# Accessibility bug reports — data.cms.gov, week 2026-W30

39 issue type(s) from 2715 pages scanned. Generated 2026-07-24 by [vital-scans](https://github.com/mgifford/vital-core), following [accessibility bug-reporting best practices](https://mgifford.github.io/ACCESSIBILITY.md/examples/ACCESSIBILITY_BUG_REPORTING_BEST_PRACTICES.html).

> Automated checks find roughly a third of accessibility barriers. Fields marked "requires manual testing" cannot be observed by an automated scan and need a human with assistive technology.

---
## Target size is at least 24×24 CSS pixels or has spacing (Minimum) (WCAG 2.5.8)

**Bug ID:** `VS-8b17d48b`  
**Pattern ID:** `VS-179ad9b3`  
**URL:** https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary  
**XPath / selector:** `<button class="selected" aria-label="card 1">`  
**WCAG SC:** 2.5.8 — Target Size (Minimum) (Level AA)  
**Rule:** Siteimprove Alfa — `sia-r113` ([reference](https://alfa.siteimprove.com/rules/sia-r113))  
**Severity:** Moderate  
**Frequency:** 62 instances; 21 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Target size is at least 24×24 CSS pixels or has spacing (Minimum). Detected by Siteimprove Alfa rule sia-r113 on 21 of 2715 scanned pages (62 instances).

### Steps to reproduce
1. Open https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary.
2. Locate the element: <button class="selected" aria-label="card 1">
3. Confirm the Siteimprove Alfa finding for rule sia-r113 against WCAG 2.5.8 Target Size (Minimum).

### Impact
Affects Limited manipulation/strength (13.0%), Limited reach (2.0%), Limited vision (2.4%).
- **Limited manipulation/strength** (13.0% of population)
- **Limited reach** (2.0% of population)
- **Limited vision** (2.4% of population)

### Affected pages
- https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary
- https://data.cms.gov/resources/medicare-part-b-spending-by-drug-data-dictionary
- https://data.cms.gov/resources/opt-out-affidavits-methodology
- https://data.cms.gov/resources/acos-aco-participants-and-snf-affiliates-methodology
- https://data.cms.gov/resources/opt-out-affidavits-data-dictionary
- https://data.cms.gov/resources/medicare-physician-other-practitioners-by-provider-and-service-data-dictionary
- https://data.cms.gov/resources/medicare-part-d-spending-by-drug-data-dictionary
- https://data.cms.gov/resources/medicare-monthly-enrollment-methodology
- https://data.cms.gov/resources/additional-information-on-revalidation
- https://data.cms.gov/tools/mapping-medicare-disparities-by-population
- https://data.cms.gov/resources/revalidation-due-date-list-data-dictionary
- https://data.cms.gov/resources/medicare-part-d-prescribers-methodology
- https://data.cms.gov/resources/medicare-part-b-spending-by-drug-methodology
- https://data.cms.gov/resources/medicare-part-d-spending-by-drug-methodology
- https://data.cms.gov/resources/medicare-durable-medical-equipment-devices-supplies-methodology
- https://data.cms.gov/resources/market-saturation-utilization-core-based-statistical-areas-methodology
- https://data.cms.gov/resources/cms-program-statistics-methodology
- https://data.cms.gov/resources/medicare-inpatient-hospitals-methodology
- https://data.cms.gov/resources/esrd-treatment-choices-etc-model-methodology
- https://data.cms.gov/resources/medicaid-managed-care-methodology
- https://data.cms.gov/resources/medicaid-managed-care-data-dictionary

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r113

### Example pages
- https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary
- https://data.cms.gov/resources/medicare-part-b-spending-by-drug-data-dictionary
- https://data.cms.gov/resources/opt-out-affidavits-methodology

---

## Accessible name of link or button matches visible label (WCAG 2.5.3)

**Bug ID:** `VS-db688ef0`  
**Pattern ID:** `VS-f7dba940`  
**URL:** https://data.cms.gov/tools  
**XPath / selector:** `<a role="button" tabindex="0" href="/tools/medicare-inpatient-hospital-look-up-tool" title="">`  
**WCAG SC:** 2.5.3 — Label in Name (Level A)  
**Rule:** Siteimprove Alfa — `sia-r14` ([reference](https://alfa.siteimprove.com/rules/sia-r14))  
**Severity:** Moderate  
**Frequency:** 24 instances; 2 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (6 weeks)

### Description
Accessible name of link or button matches visible label. Detected by Siteimprove Alfa rule sia-r14 on 2 of 2715 scanned pages (24 instances).

### Steps to reproduce
1. Open https://data.cms.gov/tools.
2. Locate the element: <a role="button" tabindex="0" href="/tools/medicare-inpatient-hospital-look-up-tool" title="">
3. Confirm the Siteimprove Alfa finding for rule sia-r14 against WCAG 2.5.3 Label in Name.

### Impact
Affects Without vision (1.0%), Without speech (0.5%).
- **Without vision** (1.0% of population)
- **Without speech** (0.5% of population)

### Affected pages
- https://data.cms.gov/tools
- https://data.cms.gov/provider-data/topics

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r14

### Example pages
- https://data.cms.gov/tools
- https://data.cms.gov/provider-data/topics

---

## [role="img"] elements must have alternative text (WCAG 1.1.1)

**Bug ID:** `VS-d631bd29`  
**Pattern ID:** `VS-ede1e565`  
**URL:** https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug  
**XPath / selector:** `canvas`  
**WCAG SC:** 1.1.1 — Non-text Content (Level A)  
**Rule:** axe-core — `role-img-alt` ([reference](https://dequeuniversity.com/rules/axe/4.12/role-img-alt?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 14 instances; 5 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<canvas role="img" height="500" width="768" style="display: block; box-sizing: border-box; height: 500px; width: 768px;"></canvas>
```

### Description
[role="img"] elements must have alternative text. Detected by axe-core rule role-img-alt on 5 of 2715 scanned pages (14 instances).

### Steps to reproduce
1. Open https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug.
2. Locate the element: canvas
3. Confirm the axe-core finding for rule role-img-alt against WCAG 1.1.1 Non-text Content.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug
- https://data.cms.gov/
- https://data.cms.gov/beta/provider-characteristics/medicare-provider-supplier-enrollment/medicare-provider-and-supplier-taxonomy-crosswalk
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-b-spending-by-drug
- https://data.cms.gov/browse-data-categories

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Elements with role="img" need an accessible name via aria-label or aria-labelledby.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/role-img-alt?application=axeAPI

### Example pages
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug
- https://data.cms.gov/
- https://data.cms.gov/beta/provider-characteristics/medicare-provider-supplier-enrollment/medicare-provider-and-supplier-taxonomy-crosswalk

---

## <svg> elements with an img role must have alternative text (WCAG 1.1.1)

**Bug ID:** `VS-25969f65`  
**Pattern ID:** `VS-cc981723`  
**URL:** https://data.cms.gov/provider-data  
**XPath / selector:** `path[fill="#7350A3"]`  
**WCAG SC:** 1.1.1 — Non-text Content (Level A)  
**Rule:** axe-core — `svg-img-alt` ([reference](https://dequeuniversity.com/rules/axe/4.12/svg-img-alt?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 10 instances; 1 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<path role="graphics-symbol" fill="#7350A3" d="M2,-154.154A154.167,154.167,0,0,1,114.721,-102.987L13.694,-14.633A20.042,20.042,0,0,0,2,-19.942Z" style="cursor: initial;"></path>
```

### Description
<svg> elements with an img role must have alternative text. Detected by axe-core rule svg-img-alt on 1 of 2715 scanned pages (10 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data.
2. Locate the element: path[fill="#7350A3"]
3. Confirm the axe-core finding for rule svg-img-alt against WCAG 1.1.1 Non-text Content.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/provider-data

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the <svg> with an image role an accessible name (<title> or aria-label).

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/svg-img-alt?application=axeAPI

---

## Image has accessible name (WCAG 1.1.1)

**Bug ID:** `VS-207cb39a`  
**Pattern ID:** `VS-a24eaa8c`  
**URL:** https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug  
**XPath / selector:** `<canvas role="img" height="500" width="768" style="display: block; box-sizing: border-box; height: 500px; width: 768px;">`  
**WCAG SC:** 1.1.1 — Non-text Content (Level A)  
**Rule:** Siteimprove Alfa — `sia-r2` ([reference](https://alfa.siteimprove.com/rules/sia-r2))  
**Severity:** Moderate  
**Frequency:** 6 instances; 3 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Image has accessible name. Detected by Siteimprove Alfa rule sia-r2 on 3 of 2715 scanned pages (6 instances).

### Steps to reproduce
1. Open https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug.
2. Locate the element: <canvas role="img" height="500" width="768" style="display: block; box-sizing: border-box; height: 500px; width: 768px;">
3. Confirm the Siteimprove Alfa finding for rule sia-r2 against WCAG 1.1.1 Non-text Content.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug
- https://data.cms.gov/
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-b-spending-by-drug

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give every <img> an accessible name (alt text), or alt="" if purely decorative.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r2

### Example pages
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug
- https://data.cms.gov/
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-b-spending-by-drug

---

## SVG image element has accessible name (WCAG 1.1.1)

**Bug ID:** `VS-24d8450a`  
**Pattern ID:** `VS-784b5009`  
**URL:** https://data.cms.gov/provider-data  
**XPath / selector:** `<path role="graphics-symbol" fill="#7350A3" d="M2,-154.154A154.167,154.167,0,0,1,115.054,-102.615L13.742,-14.589A20.042,20.042,0,0,0,2,-19.942Z" style="cursor: initial;">`  
**WCAG SC:** 1.1.1 — Non-text Content (Level A)  
**Rule:** Siteimprove Alfa — `sia-r43` ([reference](https://alfa.siteimprove.com/rules/sia-r43))  
**Severity:** Moderate  
**Frequency:** 10 instances; 1 of 2715 pages affected
  
**History:** first seen 2026-W26, last seen 2026-W30 (3 weeks)

### Description
SVG image element has accessible name. Detected by Siteimprove Alfa rule sia-r43 on 1 of 2715 scanned pages (10 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data.
2. Locate the element: <path role="graphics-symbol" fill="#7350A3" d="M2,-154.154A154.167,154.167,0,0,1,115.054,-102.615L13.742,-14.589A20.042,20.042,0,0,0,2,-19.942Z" style="cursor: initial;">
3. Confirm the Siteimprove Alfa finding for rule sia-r43 against WCAG 1.1.1 Non-text Content.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/provider-data

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r43

---

## <li> elements must be contained in a <ul> or <ol> (WCAG 1.3.1)

**Bug ID:** `VS-b4999ba9`  
**Pattern ID:** `VS-6175596b`  
**URL:** https://data.cms.gov/provider-data/topics/doctors-clinicians  
**XPath / selector:** `.dc-c-search-list-item.ds-u-padding-top--3:nth-child(1)`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** axe-core — `listitem` ([reference](https://dequeuniversity.com/rules/axe/4.12/listitem?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 43 instances; 10 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<li class="dc-c-search-list-item ds-u-padding-top--3">
```

### Description
<li> elements must be contained in a <ul> or <ol>. Detected by axe-core rule listitem on 10 of 2715 scanned pages (43 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/topics/doctors-clinicians.
2. Locate the element: .dc-c-search-list-item.ds-u-padding-top--3:nth-child(1)
3. Confirm the axe-core finding for rule listitem against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/provider-data/topics/doctors-clinicians
- https://data.cms.gov/provider-data/topics/long-term-care-hospitals
- https://data.cms.gov/provider-data/topics/physician-office-visit-costs
- https://data.cms.gov/provider-data/topics/home-health-services
- https://data.cms.gov/provider-data/topics/hospitals
- https://data.cms.gov/provider-data/topics/inpatient-rehabilitation-facilities
- https://data.cms.gov/provider-data/topics/hospice-care
- https://data.cms.gov/provider-data/topics/nursing-homes
- https://data.cms.gov/provider-data/topics/supplier-directory
- https://data.cms.gov/provider-data/topics/dialysis-facilities

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** <li> must be inside a <ul> or <ol>.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/listitem?application=axeAPI

### Example pages
- https://data.cms.gov/provider-data/topics/doctors-clinicians
- https://data.cms.gov/provider-data/topics/long-term-care-hospitals
- https://data.cms.gov/provider-data/topics/physician-office-visit-costs

---

## <ul> and <ol> must only directly contain <li>, <script> or <template> elements (WCAG 1.3.1)

**Bug ID:** `VS-69190b96`  
**Pattern ID:** `VS-a0bdbdf6`  
**URL:** https://data.cms.gov/provider-data/datasets?+Gynecology=&keyword%5B%5D=Obstetrics+  
**XPath / selector:** `ol[data-testid="results-list"]`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** axe-core — `list` ([reference](https://dequeuniversity.com/rules/axe/4.12/list?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 1 instances; 1 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<ol class="dc-dataset-search-list ds-u-padding--0 ds-u-margin-top--0 ds-u-margin-bottom--4 ds-u-display--block" data-testid="results-list">
```

### Description
<ul> and <ol> must only directly contain <li>, <script> or <template> elements. Detected by axe-core rule list on 1 of 2715 scanned pages (1 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/datasets?+Gynecology=&keyword%5B%5D=Obstetrics+.
2. Locate the element: ol[data-testid="results-list"]
3. Confirm the axe-core finding for rule list against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/provider-data/datasets?+Gynecology=&keyword%5B%5D=Obstetrics+

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use <ul>/<ol> with only <li> children for lists; don't fake lists with <div>s.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/list?application=axeAPI

---

## Presentational children of an element are not focusable (WCAG 1.3.1)

**Bug ID:** `VS-65df7376`  
**Pattern ID:** `VS-d6097011`  
**URL:** https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information  
**XPath / selector:** `<ul class="list-container__list list-container__list-right">`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r68` ([reference](https://alfa.siteimprove.com/rules/sia-r68))  
**Severity:** Moderate  
**Frequency:** 22 instances; 22 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Presentational children of an element are not focusable. Detected by Siteimprove Alfa rule sia-r68 on 22 of 2715 scanned pages (22 instances).

### Steps to reproduce
1. Open https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information.
2. Locate the element: <ul class="list-container__list list-container__list-right">
3. Confirm the Siteimprove Alfa finding for rule sia-r68 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/summary-statistics-on-beneficiary-enrollment/health-insurance-marketplace/health-insurance-exchanges-monthly-effectuated-enrollment
- https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/medicare-alternative-payment-model-adoption
- https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/medicare-diabetes-prevention-program
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-participants
- https://data.cms.gov/summary-statistics-on-use-and-payments/program-integrity-market-saturation-by-type-of-service/market-saturation-utilization-state-county
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/data/june-30-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/revoked-medicare-providers-and-suppliers
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicaid-spending-by-drug
- https://data.cms.gov/provider-data/dataset/46dc-a66c
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug
- https://data.cms.gov/summary-statistics-on-beneficiary-enrollment/medicare-and-medicaid-reports/medicare-monthly-enrollment
- https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/comprehensive-care-for-joint-replacement-model-metropolitan-statistical-areas
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-service-type-reports/medicare-telehealth-trends
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/cpc-initiative-participating-primary-care-practices
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-webinars-and-forums
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-b-spending-by-drug
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-d-spending-by-drug
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-milestones-and-updates
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-opioid-prescribing-rates/medicare-part-d-opioid-prescribing-rates-by-geography

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r68

### Example pages
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/summary-statistics-on-beneficiary-enrollment/health-insurance-marketplace/health-insurance-exchanges-monthly-effectuated-enrollment
- https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/medicare-alternative-payment-model-adoption

---

## Element has required aria-owns (WCAG 1.3.1)

**Bug ID:** `VS-e1169a36`  
**Pattern ID:** `VS-4408605e`  
**URL:** https://data.cms.gov/provider-data/dataset/46dc-a66c  
**XPath / selector:** `<th title="collection_type" class="ds-u-border-y--2 ds-u-padding--2 ds-u-border--dark  ds-u-font-weight--bold" aria-sort="none" style="width: 150px;">`  
**WCAG SC:** 1.3.1 — Info and Relationships (Level A)  
**Rule:** Siteimprove Alfa — `sia-r46` ([reference](https://alfa.siteimprove.com/rules/sia-r46))  
**Severity:** Moderate  
**Frequency:** 1 instances; 1 of 2715 pages affected
  
**History:** first seen 2026-W27, last seen 2026-W30 (3 weeks)

### Description
Element has required aria-owns. Detected by Siteimprove Alfa rule sia-r46 on 1 of 2715 scanned pages (1 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/dataset/46dc-a66c.
2. Locate the element: <th title="collection_type" class="ds-u-border-y--2 ds-u-padding--2 ds-u-border--dark  ds-u-font-weight--bold" aria-sort="none" style="width: 150px;">
3. Confirm the Siteimprove Alfa finding for rule sia-r46 against WCAG 1.3.1 Info and Relationships.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited cognitive, language, or learning ability (11.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited cognitive, language, or learning ability** (11.0% of population)

### Affected pages
- https://data.cms.gov/provider-data/dataset/46dc-a66c

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r46

---

## Links must be distinguishable without relying on color (WCAG 1.4.1)

**Bug ID:** `VS-3f0aee56`  
**Pattern ID:** `VS-8ade3360`  
**URL:** https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology  
**XPath / selector:** `#RichTextField-5c28484f-37b5-4d2f-84e7-78092d3462c5 > p > a[target="_blank"][rel="noopener noreferrer"]`  
**WCAG SC:** 1.4.1 — Use of Color (Level A)  
**Rule:** axe-core — `link-in-text-block` ([reference](https://dequeuniversity.com/rules/axe/4.12/link-in-text-block?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 94 instances; 12 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<a href="https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/PhysicianFeedbackProgram/Downloads/Detailed-Methodology-for-the-2018-Value-Modifier-and-2016-Quality-and-Resource-Use-Report-.pdf
```

### Description
Links must be distinguishable without relying on color. Detected by axe-core rule link-in-text-block on 12 of 2715 scanned pages (94 instances).

### Steps to reproduce
1. Open https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology.
2. Locate the element: #RichTextField-5c28484f-37b5-4d2f-84e7-78092d3462c5 > p > a[target="_blank"][rel="noopener noreferrer"]
3. Confirm the axe-core finding for rule link-in-text-block against WCAG 1.4.1 Use of Color.

### Impact
Affects Without color perception (4.5%), Limited vision (2.4%).
- **Without color perception** (4.5% of population)
- **Limited vision** (2.4% of population)

### Affected pages
- https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology
- https://data.cms.gov/resources/independent-dispute-resolution-methodology
- https://data.cms.gov/summary-statistics-on-use-and-payments/physiciansupplier-procedure-summary
- https://data.cms.gov/resources/medicare-post-acute-care-hospice-by-provider-and-service-methodology
- https://data.cms.gov/resources/esrd-facility-aggregation-group-performance-data-dictionary
- https://data.cms.gov/about
- https://data.cms.gov/medicare-value-based-payment-modifier-program/value-modifier
- https://data.cms.gov/resources/medicare-physician-other-practitioners-by-provider-data-dictionary-legacy
- https://data.cms.gov/resources/cms-program-statistics-methodology
- https://data.cms.gov/collection/synthetic-medicare-enrollment-fee-for-service-claims-and-prescription-drug-event
- https://data.cms.gov/resources/medicare-durable-medical-equipment-devices-supplies-by-referring-provider-data-dictionary-legacy
- https://data.cms.gov/resources/managing-clinician-aggregation-group-performance-data-dictionary

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/link-in-text-block?application=axeAPI

### Example pages
- https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology
- https://data.cms.gov/resources/independent-dispute-resolution-methodology
- https://data.cms.gov/summary-statistics-on-use-and-payments/physiciansupplier-procedure-summary

---

## Scrollable region must have keyboard access (WCAG 2.1.1)

**Bug ID:** `VS-eaab37ac`  
**Pattern ID:** `VS-c613c153`  
**URL:** https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025  
**XPath / selector:** `.tbody-container`  
**WCAG SC:** 2.1.1 — Keyboard (Level A)  
**Rule:** axe-core — `scrollable-region-focusable` ([reference](https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 601 instances; 601 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<div class="tbody-container">
```

### Description
Scrollable region must have keyboard access. Detected by axe-core rule scrollable-region-focusable on 601 of 2715 scanned pages (601 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025.
2. Locate the element: .tbody-container
3. Confirm the axe-core finding for rule scrollable-region-focusable against WCAG 2.1.1 Keyboard.

### Impact
Affects Without vision (1.0%), Limited manipulation/strength (13.0%), Limited reach (2.0%).
- **Without vision** (1.0% of population)
- **Limited manipulation/strength** (13.0% of population)
- **Limited reach** (2.0% of population)

### Affected pages
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025
- https://data.cms.gov/medicare-current-beneficiary-survey-mcbs/income-and-asset-ownership/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/data/q4-2024
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug/data
- https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/ambulatory-specialty-model-participants/data
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-geography-and-service/data/2020
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/federally-qualified-health-center-all-owners/data/q1-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data/q1-2025
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug/data
- https://data.cms.gov/medicare-shared-savings-program/county-level-aggregate-expenditure-and-risk-score-data-on-assignable-beneficiaries/data/2023
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/home-health-agency-enrollments/data/q3-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership-owner-information/data/q1-2025
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-geography-and-service/data/2018
- https://data.cms.gov/quality-of-care/payroll-based-journal-employee-detail-nursing-home-staffing/data/q3-2024
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-home-health-agency-by-geography-and-provider/data
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-provider-and-drug/data/2022
- https://data.cms.gov/provider-compliance/cost-reports/hospital-provider-cost-report/data/2021
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/hospital-service-area/data/2021
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-supplier-and-service/data/2021
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/rural-health-clinic-enrollments/data
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-inpatient-rehabilitation-facility-by-geography-and-provider/data
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-skilled-nursing-facility-by-geography-provider-and-service/data/2022

…and more — 601 pages total ([download CSV](csv/axe-core__scrollable-region-focusable.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Make scrollable regions keyboard-focusable (tabindex="0") so keyboard users can scroll them.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/scrollable-region-focusable?application=axeAPI

### Example pages
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025
- https://data.cms.gov/medicare-current-beneficiary-survey-mcbs/income-and-asset-ownership/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/data/q4-2024

---

## Select element must have an accessible name (WCAG 4.1.2)

**Bug ID:** `VS-b21d1758`  
**Pattern ID:** `VS-fab92378`  
**URL:** https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs  
**XPath / selector:** `.form-control`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `select-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/select-name?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 127 instances; 127 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<select name="version-select" class="form-control">
```

### Description
Select element must have an accessible name. Detected by axe-core rule select-name on 127 of 2715 scanned pages (127 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs.
2. Locate the element: .form-control
3. Confirm the axe-core finding for rule select-name against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-service-type-reports/medicare-telehealth-trends/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/next-generation-accountable-care-organization-model-data/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-hospice-by-geography-and-provider/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-supplier/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/physiciansupplier-procedure-summary/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/medicare-clinical-laboratory-fee-schedule-private-payer-rates-and-volumes/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-provider-and-drug/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-geography-and-drug/api-docs
- https://data.cms.gov/quality-of-care/payroll-based-journal-employee-detail-nursing-home-staffing/api-docs
- https://data.cms.gov/quality-of-care/medicare-dialysis-facilities/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/order-and-referring/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-all-owners/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-quality-improvement-and-evaluation-system/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-change-of-ownership/api-docs
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-aligned-beneficiaries/api-docs
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/revalidation-due-date-list/api-docs
- https://data.cms.gov/quality-of-care/nursing-home-chain-performance-measures/api-docs
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/medicare-fee-for-service-public-provider-enrollment/api-docs
- https://data.cms.gov/quality-of-care/deficit-reduction-act-hospital-acquired-condition-measures/api-docs

…and more — 127 pages total ([download CSV](csv/axe-core__select-name.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the <select> an accessible name via a <label> or aria-label.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/select-name?application=axeAPI

### Example pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-service-type-reports/medicare-telehealth-trends/api-docs

---

## Form elements must have labels (WCAG 4.1.2)

**Bug ID:** `VS-5fde38a2`  
**Pattern ID:** `VS-fafffee0`  
**URL:** https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool  
**XPath / selector:** `#react-select-2-input`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `label` ([reference](https://dequeuniversity.com/rules/axe/4.12/label?application=axeAPI))  
**Severity:** Critical  
**Frequency:** 14 instances; 8 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<input class="InteractiveToolsSear..." autocapitalize="none" autocomplete="off" autocorrect="off" id="react-select-2-input" spellcheck="false" tabindex="0" type="text" aria-autocomplete="list" aria-ex
```

### Description
Form elements must have labels. Detected by axe-core rule label on 8 of 2715 scanned pages (14 instances).

### Steps to reproduce
1. Open https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool.
2. Locate the element: #react-select-2-input
3. Confirm the axe-core finding for rule label against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/tools/market-saturation-utilization-state-county-mapping-tool
- https://data.cms.gov/medicare-shared-savings-program/accountable-care-organizations
- https://data.cms.gov/tools/medicare-revalidation-list
- https://data.cms.gov/tools/medicare-inpatient-hospital-look-up-tool
- https://data.cms.gov/tools/medicare-physician-other-practitioner-look-up-tool
- https://data.cms.gov/tools/market-saturation-utilization-core-based-statistical-areas-mapping-tool

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Associate every form control with a <label> (via for/id) or an aria-label/aria-labelledby.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label?application=axeAPI

### Example pages
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/tools/market-saturation-utilization-state-county-mapping-tool

---

## Elements must only use permitted ARIA attributes (WCAG 4.1.2)

**Bug ID:** `VS-3d192113`  
**Pattern ID:** `VS-ebb1c464`  
**URL:** https://data.cms.gov/medicare-shared-savings-program/accountable-care-organizations  
**XPath / selector:** `.ExpandIcon__wrapper`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `aria-prohibited-attr` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-prohibited-attr?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 1 instances; 1 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<div class="ExpandIcon__wrapper" title="Expand" aria-label="Expand">
```

### Description
Elements must only use permitted ARIA attributes. Detected by axe-core rule aria-prohibited-attr on 1 of 2715 scanned pages (1 instances).

### Steps to reproduce
1. Open https://data.cms.gov/medicare-shared-savings-program/accountable-care-organizations.
2. Locate the element: .ExpandIcon__wrapper
3. Confirm the axe-core finding for rule aria-prohibited-attr against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/medicare-shared-savings-program/accountable-care-organizations

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-prohibited-attr?application=axeAPI

---

## ARIA commands must have an accessible name (WCAG 4.1.2)

**Bug ID:** `VS-e71d7143`  
**Pattern ID:** `VS-5c82bd60`  
**URL:** https://data.cms.gov/provider-data/birthing-friendly-hospitals-and-health-systems  
**XPath / selector:** `.p-dropdown-trigger`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** axe-core — `aria-command-name` ([reference](https://dequeuniversity.com/rules/axe/4.12/aria-command-name?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 1 instances; 1 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<div class="p-dropdown-trigger" role="button" aria-haspopup="listbox" aria-expanded="false" data-pc-section="trigger">
```

### Description
ARIA commands must have an accessible name. Detected by axe-core rule aria-command-name on 1 of 2715 scanned pages (1 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/birthing-friendly-hospitals-and-health-systems.
2. Locate the element: .p-dropdown-trigger
3. Confirm the axe-core finding for rule aria-command-name against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/provider-data/birthing-friendly-hospitals-and-health-systems

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the command (button/link/menuitem) an accessible name via text or aria-label.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/aria-command-name?application=axeAPI

---

## aria-hidden element does not contain focusable elements (WCAG 4.1.2)

**Bug ID:** `VS-8fbb959a`  
**Pattern ID:** `VS-f6cf30ff`  
**URL:** https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352  
**XPath / selector:** `<div id="tooltip-trigger--115" tabindex="-1" class="ds-c-tooltip" data-placement="bottom-start">`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** Siteimprove Alfa — `sia-r17` ([reference](https://alfa.siteimprove.com/rules/sia-r17))  
**Severity:** Moderate  
**Frequency:** 1853 instances; 381 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
aria-hidden element does not contain focusable elements. Detected by Siteimprove Alfa rule sia-r17 on 381 of 2715 scanned pages (1853 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352.
2. Locate the element: <div id="tooltip-trigger--115" tabindex="-1" class="ds-c-tooltip" data-placement="bottom-start">
3. Confirm the Siteimprove Alfa finding for rule sia-r17 against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352
- https://data.cms.gov/provider-data/dataset/6jpm-sxkc?page=3
- https://data.cms.gov/provider-data/dataset/covid-19_hcp
- https://data.cms.gov/provider-data/dataset/apyc-v239?page=4
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/provider-data/dataset/5sqm-2qku?page=2
- https://data.cms.gov/provider-data/dataset/3xeb-u9wp
- https://data.cms.gov/provider-data/dataset/k653-4ka8
- https://data.cms.gov/provider-data/dataset/dgck-syfz?page=3
- https://data.cms.gov/provider-data/dataset/4jcv-atw7?page=5
- https://data.cms.gov/provider-data/dataset/eda0-92f0?page=5
- https://data.cms.gov/provider-data/dataset/ptds-r8im?page=5
- https://data.cms.gov/provider-data/dataset/0938-3dfa?page=2
- https://data.cms.gov/provider-data/dataset/029b-dd7e?page=4
- https://data.cms.gov/provider-data/dataset/q9vs-r7wp?page=3
- https://data.cms.gov/provider-data/dataset/vxub-6swi
- https://data.cms.gov/provider-data/dataset/k2ze-bqvw?page=5
- https://data.cms.gov/provider-data/dataset/069d-826b?page=1719
- https://data.cms.gov/provider-data/dataset/tee5-ixt5?page=3
- https://data.cms.gov/provider-data/dataset/f4ga-b9gx?page=3
- https://data.cms.gov/provider-data/dataset/ypbt-wvdk
- https://data.cms.gov/provider-data/dataset/nhsn_bsi?page=2
- https://data.cms.gov/provider-data/dataset/fykj-qjee?page=2
- https://data.cms.gov/provider-data/dataset/qatj-nmws?page=3
- https://data.cms.gov/provider-data/dataset/avtz-f2ge?page=3

…and more — 381 pages total ([download CSV](csv/alfa__sia-r17.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r17

### Example pages
- https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352
- https://data.cms.gov/provider-data/dataset/6jpm-sxkc?page=3
- https://data.cms.gov/provider-data/dataset/covid-19_hcp

---

## Form field has accessible name (WCAG 4.1.2)

**Bug ID:** `VS-b198125c`  
**Pattern ID:** `VS-a48e6078`  
**URL:** https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs  
**XPath / selector:** `<select name="version-select" class="form-control">`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** Siteimprove Alfa — `sia-r8` ([reference](https://alfa.siteimprove.com/rules/sia-r8))  
**Severity:** Moderate  
**Frequency:** 81 instances; 77 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Form field has accessible name. Detected by Siteimprove Alfa rule sia-r8 on 77 of 2715 scanned pages (81 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs.
2. Locate the element: <select name="version-select" class="form-control">
3. Confirm the Siteimprove Alfa finding for rule sia-r8 against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-hospice-by-geography-and-provider/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-supplier/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/physiciansupplier-procedure-summary/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/medicare-clinical-laboratory-fee-schedule-private-payer-rates-and-volumes/api-docs
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-geography-and-drug/api-docs
- https://data.cms.gov/quality-of-care/payroll-based-journal-employee-detail-nursing-home-staffing/api-docs
- https://data.cms.gov/quality-of-care/medicare-dialysis-facilities/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/order-and-referring/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-all-owners/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-quality-improvement-and-evaluation-system/api-docs
- https://data.cms.gov/quality-of-care/deficit-reduction-act-hospital-acquired-condition-measures/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-price-transparency-enforcement-activities-and-outcomes/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-enrollments/api-docs
- https://data.cms.gov/medicare-shared-savings-program/advance-investment-payment-spend-plan/api-docs
- https://data.cms.gov/quality-of-care/minimum-data-set-frequency/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-opioid-prescribing-rates/medicare-part-d-opioid-prescribing-rates-by-geography/api-docs
- https://data.cms.gov/tools/market-saturation-utilization-state-county-mapping-tool
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-skilled-nursing-facility-by-geography-provider-and-service/api-docs

…and more — 77 pages total ([download CSV](csv/alfa__sia-r8.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Associate the form field with a label.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r8

### Example pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs

---

## Component with same name serves same purpose (WCAG 4.1.2)

**Bug ID:** `VS-3bdd7bf3`  
**Pattern ID:** `VS-a2a3dffb`  
**URL:** https://data.cms.gov/quality-of-care  
**XPath / selector:** `<div aria-selected="true" aria-label="slide" role="option" class="slide___3-Nqo slideHorizontal___1NzNV carousel__slide carousel__slide--visible MoreTopicCarousel__slide">`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** Siteimprove Alfa — `sia-r90` ([reference](https://alfa.siteimprove.com/rules/sia-r90))  
**Severity:** Moderate  
**Frequency:** 9 instances; 5 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Component with same name serves same purpose. Detected by Siteimprove Alfa rule sia-r90 on 5 of 2715 scanned pages (9 instances).

### Steps to reproduce
1. Open https://data.cms.gov/quality-of-care.
2. Locate the element: <div aria-selected="true" aria-label="slide" role="option" class="slide___3-Nqo slideHorizontal___1NzNV carousel__slide carousel__slide--visible MoreTopicCarousel__slide">
3. Confirm the Siteimprove Alfa finding for rule sia-r90 against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/quality-of-care
- https://data.cms.gov/summary-statistics-on-provider-enrollment
- https://data.cms.gov/provider-compliance
- https://data.cms.gov/medicare-value-based-payment-modifier-program
- https://data.cms.gov/covid-19

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r90

### Example pages
- https://data.cms.gov/quality-of-care
- https://data.cms.gov/summary-statistics-on-provider-enrollment
- https://data.cms.gov/provider-compliance

---

## Button has accessible name (WCAG 4.1.2)

**Bug ID:** `VS-d42071df`  
**Pattern ID:** `VS-29f9f921`  
**URL:** https://data.cms.gov/provider-data/birthing-friendly-hospitals-and-health-systems  
**XPath / selector:** `<div class="p-dropdown-trigger" role="button" aria-haspopup="listbox" aria-expanded="false">`  
**WCAG SC:** 4.1.2 — Name, Role, Value (Level A)  
**Rule:** Siteimprove Alfa — `sia-r12` ([reference](https://alfa.siteimprove.com/rules/sia-r12))  
**Severity:** Moderate  
**Frequency:** 1 instances; 1 of 2715 pages affected
  
**History:** first seen 2026-W27, last seen 2026-W30 (3 weeks)

### Description
Button has accessible name. Detected by Siteimprove Alfa rule sia-r12 on 1 of 2715 scanned pages (1 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/birthing-friendly-hospitals-and-health-systems.
2. Locate the element: <div class="p-dropdown-trigger" role="button" aria-haspopup="listbox" aria-expanded="false">
3. Confirm the Siteimprove Alfa finding for rule sia-r12 against WCAG 4.1.2 Name, Role, Value.

### Impact
Affects Without vision (1.0%), Limited vision (2.4%), Limited manipulation/strength (13.0%).
- **Without vision** (1.0% of population)
- **Limited vision** (2.4% of population)
- **Limited manipulation/strength** (13.0% of population)

### Affected pages
- https://data.cms.gov/provider-data/birthing-friendly-hospitals-and-health-systems

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Give the button an accessible name via text, aria-label, or aria-labelledby.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r12

---

## Elements must meet minimum color contrast ratio thresholds (WCAG 1.4.3)

**Bug ID:** `VS-ff9ec64e`  
**Pattern ID:** `VS-be8d563e`  
**URL:** https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs  
**XPath / selector:** `a[aria-describedby="tooltip-trigger--325"]`  
**WCAG SC:** 1.4.3 — Contrast (Minimum) (Level AA)  
**Rule:** axe-core — `color-contrast` ([reference](https://dequeuniversity.com/rules/axe/4.12/color-contrast?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 133 instances; 15 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<a aria-describedby="tooltip-trigger--325" class="ds-c-tooltip__trigger dkan-disabled-link" tabindex="0">
```

### Description
Elements must meet minimum color contrast ratio thresholds. Detected by axe-core rule color-contrast on 15 of 2715 scanned pages (133 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs.
2. Locate the element: a[aria-describedby="tooltip-trigger--325"]
3. Confirm the axe-core finding for rule color-contrast against WCAG 1.4.3 Contrast (Minimum).

### Impact
Affects Limited vision (2.4%), Without color perception (4.5%).
- **Limited vision** (2.4% of population)
- **Without color perception** (4.5% of population)

### Affected pages
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Nephrology
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Hospice+and+Palliative+Care
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Preventive+Medicine
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Cardiac+Surgery
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Neuropsychiatry
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-non-physicians/data/june-18-2026
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Physical+Therapist+in+Private+Practice
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/order-and-referring/data/june-2-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/may-26-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-non-physicians/data/june-16-2026
- https://data.cms.gov/sitemap
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Physician+Assistant
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Pulmonary+Disease
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Psychiatry

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Increase the contrast between text and its background to at least 4.5:1 (3:1 for large text). Check both light and dark modes.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/color-contrast?application=axeAPI

### Example pages
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Nephrology
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Hospice+and+Palliative+Care

---

## Text has sufficient color contrast (Enhanced) (WCAG 1.4.3)

**Bug ID:** `VS-7c9855fa`  
**Pattern ID:** `VS-f7e99f4b`  
**URL:** https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics  
**XPath / selector:** `text: "Access API"`  
**WCAG SC:** 1.4.3 — Contrast (Minimum) (Level AA)  
**Rule:** Siteimprove Alfa — `sia-r69` ([reference](https://alfa.siteimprove.com/rules/sia-r69))  
**Severity:** Moderate  
**Frequency:** 8550 instances; 691 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Text has sufficient color contrast (Enhanced). Detected by Siteimprove Alfa rule sia-r69 on 691 of 2715 scanned pages (8550 instances).

### Steps to reproduce
1. Open https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics.
2. Locate the element: text: "Access API"
3. Confirm the Siteimprove Alfa finding for rule sia-r69 against WCAG 1.4.3 Contrast (Minimum).

### Impact
Affects Limited vision (2.4%), Without color perception (4.5%).
- **Limited vision** (2.4% of population)
- **Without color perception** (4.5% of population)

### Affected pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system/data
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/federally-qualified-health-center-all-owners/data/q1-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data/q1-2025
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug/data
- https://data.cms.gov/resources/value-modifier-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-geography-and-service/data/2018
- https://data.cms.gov/resources/aco-reach-financial-and-quality-results-data-dictionary
- https://data.cms.gov/resources/minimum-data-set-frequency-methodology
- https://data.cms.gov/quality-of-care/payroll-based-journal-employee-detail-nursing-home-staffing/data/q3-2024
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-provider-and-drug/data/2022
- https://data.cms.gov/resources/county-level-aggregate-expenditure-and-risk-score-data-on-assignable-beneficiaries-methodology-2021-2023
- https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-home-health-agency-by-geography-and-provider
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs
- https://data.cms.gov/datasets?keyword%5B0%5D=Average&page=2
- https://data.cms.gov/resources/medicare-service-type-reports-methodology
- https://data.cms.gov/datasets?page=8&theme%5B0%5D=Hospitals

…and more — 691 pages total ([download CSV](csv/alfa__sia-r69.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Increase text contrast to meet WCAG AA (4.5:1, or 3:1 for large text).

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r69

### Example pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider

---

## Text has enhanced contrast (WCAG 1.4.6)

**Bug ID:** `VS-a43c1c3b`  
**Pattern ID:** `VS-646b1e0b`  
**URL:** https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics  
**XPath / selector:** `text: "Access API"`  
**WCAG SC:** 1.4.6 — Contrast (Enhanced) (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r66` ([reference](https://alfa.siteimprove.com/rules/sia-r66))  
**Severity:** Moderate  
**Frequency:** 21693 instances; 708 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Text has enhanced contrast. Detected by Siteimprove Alfa rule sia-r66 on 708 of 2715 scanned pages (21693 instances).

### Steps to reproduce
1. Open https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics.
2. Locate the element: text: "Access API"
3. Confirm the Siteimprove Alfa finding for rule sia-r66 against WCAG 1.4.6 Contrast (Enhanced).

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system/data
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/federally-qualified-health-center-all-owners/data/q1-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data/q1-2025
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug/data
- https://data.cms.gov/resources/value-modifier-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-geography-and-service/data/2018
- https://data.cms.gov/resources/aco-reach-financial-and-quality-results-data-dictionary
- https://data.cms.gov/resources/minimum-data-set-frequency-methodology
- https://data.cms.gov/quality-of-care/payroll-based-journal-employee-detail-nursing-home-staffing/data/q3-2024
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-provider-and-drug/data/2022
- https://data.cms.gov/resources/county-level-aggregate-expenditure-and-risk-score-data-on-assignable-beneficiaries-methodology-2021-2023
- https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-home-health-agency-by-geography-and-provider
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs
- https://data.cms.gov/datasets?keyword%5B0%5D=Average&page=2
- https://data.cms.gov/resources/medicare-service-type-reports-methodology
- https://data.cms.gov/datasets?page=8&theme%5B0%5D=Hospitals

…and more — 708 pages total ([download CSV](csv/alfa__sia-r66.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Increase text contrast to meet WCAG AAA (7:1).

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r66

### Example pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider

---

## Text has minimum contrast ratio of 4.5:1 (WCAG 1.4.8)

**Bug ID:** `VS-ae250123`  
**Pattern ID:** `VS-2208081b`  
**URL:** https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352  
**XPath / selector:** `<p class="ds-c-usa-banner__header-text">`  
**WCAG SC:** 1.4.8 — Visual Presentation (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r73` ([reference](https://alfa.siteimprove.com/rules/sia-r73))  
**Severity:** Moderate  
**Frequency:** 17532 instances; 1204 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Text has minimum contrast ratio of 4.5:1. Detected by Siteimprove Alfa rule sia-r73 on 1204 of 2715 scanned pages (17532 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352.
2. Locate the element: <p class="ds-c-usa-banner__header-text">
3. Confirm the Siteimprove Alfa finding for rule sia-r73 against WCAG 1.4.8 Visual Presentation.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Promoting+Interoperability
- https://data.cms.gov/provider-data/dataset/6jpm-sxkc?page=3
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/provider-data/dataset/covid-19_hcp
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system/data
- https://data.cms.gov/provider-data/dataset/apyc-v239?page=4
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Cancer
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/federally-qualified-health-center-all-owners/data/q1-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data/q1-2025
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/provider-data/dataset/5sqm-2qku?page=2
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug/data
- https://data.cms.gov/resources/value-modifier-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Hospitals
- https://data.cms.gov/provider-data/dataset/3xeb-u9wp
- https://data.cms.gov/provider-data/dataset/k653-4ka8
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-geography-and-service/data/2018
- https://data.cms.gov/resources/aco-reach-financial-and-quality-results-data-dictionary

…and more — 1204 pages total ([download CSV](csv/alfa__sia-r73.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r73

### Example pages
- https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Promoting+Interoperability

---

## Link is distinguishable without relying on color (WCAG 1.4.8)

**Bug ID:** `VS-422376a0`  
**Pattern ID:** `VS-fbf54eba`  
**URL:** https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool  
**XPath / selector:** `<p class="latestDateAvailable">`  
**WCAG SC:** 1.4.8 — Visual Presentation (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r74` ([reference](https://alfa.siteimprove.com/rules/sia-r74))  
**Severity:** Moderate  
**Frequency:** 26 instances; 26 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Link is distinguishable without relying on color. Detected by Siteimprove Alfa rule sia-r74 on 26 of 2715 scanned pages (26 instances).

### Steps to reproduce
1. Open https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool.
2. Locate the element: <p class="latestDateAvailable">
3. Confirm the Siteimprove Alfa finding for rule sia-r74 against WCAG 1.4.8 Visual Presentation.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/tools/medicare-part-d-drug-spending-dashboard
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/tools/geographic-variation-in-standardized-medicare-spending-state
- https://data.cms.gov/summary-statistics-on-beneficiary-enrollment/health-insurance-marketplace
- https://data.cms.gov/quality-of-care
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-opioid-prescribing-rates
- https://data.cms.gov/tools/market-saturation-utilization-state-county-mapping-tool
- https://data.cms.gov/provider-compliance/fee-for-service-error-rate-improper-payment
- https://data.cms.gov/tools/mapping-medicare-disparities-by-population
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-premium-reports
- https://data.cms.gov/cms-innovation-center-programs/alternative-payments-comprehensive-primary-care-initiative-participating-primary-care-practices
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-geographic-comparisons
- https://data.cms.gov/tools/geographic-variation-in-standardized-medicare-spending-county
- https://data.cms.gov/tools/medicare-revalidation-list
- https://data.cms.gov/tools/mapping-medicare-disparities-by-hospital
- https://data.cms.gov/summary-statistics-on-provider-enrollment/medicare-provider-type-reports
- https://data.cms.gov/tools/medicare-inpatient-hospital-look-up-tool
- https://data.cms.gov/summary-statistics-on-provider-enrollment
- https://data.cms.gov/provider-compliance
- https://data.cms.gov/medicare-value-based-payment-modifier-program
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview
- https://data.cms.gov/covid-19
- https://data.cms.gov/provider-compliance/cost-reports
- https://data.cms.gov/tools/medicaid-drug-spending-dashboard

…and more — 26 pages total ([download CSV](csv/alfa__sia-r74.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r74

### Example pages
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/tools/medicare-part-d-drug-spending-dashboard
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool

---

## Target size is at least 44×44 CSS pixels (Enhanced) (WCAG 2.5.5)

**Bug ID:** `VS-60de3682`  
**Pattern ID:** `VS-cb53cc4d`  
**URL:** https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352  
**XPath / selector:** `<a class="ally-skip-link" href="#main-content">`  
**WCAG SC:** 2.5.5 — Target Size (Enhanced) (Level AAA)  
**Rule:** Siteimprove Alfa — `sia-r111` ([reference](https://alfa.siteimprove.com/rules/sia-r111))  
**Severity:** Moderate  
**Frequency:** 29083 instances; 1187 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Target size is at least 44×44 CSS pixels (Enhanced). Detected by Siteimprove Alfa rule sia-r111 on 1187 of 2715 scanned pages (29083 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352.
2. Locate the element: <a class="ally-skip-link" href="#main-content">
3. Confirm the Siteimprove Alfa finding for rule sia-r111 against WCAG 2.5.5 Target Size (Enhanced).

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Promoting+Interoperability
- https://data.cms.gov/provider-data/dataset/6jpm-sxkc?page=3
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/provider-data/dataset/covid-19_hcp
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system/data
- https://data.cms.gov/provider-data/dataset/apyc-v239?page=4
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Cancer
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/federally-qualified-health-center-all-owners/data/q1-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data/q1-2025
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/provider-data/dataset/5sqm-2qku?page=2
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug/data
- https://data.cms.gov/resources/value-modifier-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Hospitals
- https://data.cms.gov/provider-data/dataset/3xeb-u9wp
- https://data.cms.gov/provider-data/dataset/k653-4ka8
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-geography-and-service/data/2018
- https://data.cms.gov/resources/aco-reach-financial-and-quality-results-data-dictionary

…and more — 1187 pages total ([download CSV](csv/alfa__sia-r111.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r111

### Example pages
- https://data.cms.gov/provider-data/dataset/ijh5-nb2v?page=2352
- https://data.cms.gov/provider-data/datasets?theme%5B0%5D=Physician+office+visit+costs
- https://data.cms.gov/provider-data/datasets?keyword%5B%5D=Promoting+Interoperability

---

## Form elements should have a visible label (WCAG criterion undetermined)

**Bug ID:** `VS-a78ba437`  
**Pattern ID:** `VS-33841929`  
**URL:** https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool  
**XPath / selector:** `#react-select-2-input`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `label-title-only` ([reference](https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI))  
**Severity:** Serious  
**Frequency:** 11 instances; 7 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<input class="InteractiveToolsSear..." autocapitalize="none" autocomplete="off" autocorrect="off" id="react-select-2-input" spellcheck="false" tabindex="0" type="text" aria-autocomplete="list" aria-ex
```

### Description
Form elements should have a visible label. Detected by axe-core rule label-title-only on 7 of 2715 scanned pages (11 instances).

### Steps to reproduce
1. Open https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool.
2. Locate the element: #react-select-2-input
3. Confirm the axe-core finding for rule label-title-only.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/tools/market-saturation-utilization-state-county-mapping-tool
- https://data.cms.gov/tools/medicare-revalidation-list
- https://data.cms.gov/tools/medicare-inpatient-hospital-look-up-tool
- https://data.cms.gov/tools/medicare-physician-other-practitioner-look-up-tool
- https://data.cms.gov/tools/market-saturation-utilization-core-based-statistical-areas-mapping-tool

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/label-title-only?application=axeAPI

### Example pages
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/tools/market-saturation-utilization-state-county-mapping-tool

---

## Banner landmark should not be contained in another landmark (WCAG criterion undetermined)

**Bug ID:** `VS-37c9e032`  
**Pattern ID:** `VS-30db094d`  
**URL:** https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025  
**XPath / selector:** `.Header`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `landmark-banner-is-top-level` ([reference](https://dequeuniversity.com/rules/axe/4.12/landmark-banner-is-top-level?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 1349 instances; 1349 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<header class="Header" style="position: sticky;">
```

### Description
Banner landmark should not be contained in another landmark. Detected by axe-core rule landmark-banner-is-top-level on 1349 of 2715 scanned pages (1349 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025.
2. Locate the element: .Header
3. Confirm the axe-core finding for rule landmark-banner-is-top-level.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025
- https://data.cms.gov/resources/mcbs-summary-tables-glossary
- https://data.cms.gov/medicare-current-beneficiary-survey-mcbs/income-and-asset-ownership/data
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/data/q4-2024
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/api-docs
- https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/ambulatory-specialty-model-participants/data
- https://data.cms.gov/resources/public-reporting-of-missing-digital-contact-information-data-dictionary
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-service-type-reports/medicare-telehealth-trends/api-docs
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/resources/number-of-accountable-care-organization-assigned-beneficiaries-by-county-data-dictionary-2023
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-geography-and-service/data/2020
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system/data
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/federally-qualified-health-center-all-owners/data/q1-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data/q1-2025
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug/data
- https://data.cms.gov/medicare-shared-savings-program/county-level-aggregate-expenditure-and-risk-score-data-on-assignable-beneficiaries/data/2023
- https://data.cms.gov/resources/value-modifier-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool

…and more — 1349 pages total ([download CSV](csv/axe-core__landmark-banner-is-top-level.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Put the banner landmark (<header>) at the top level, not nested inside another landmark.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-banner-is-top-level?application=axeAPI

### Example pages
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospice-all-owners/data/q4-2025
- https://data.cms.gov/resources/mcbs-summary-tables-glossary
- https://data.cms.gov/medicare-current-beneficiary-survey-mcbs/income-and-asset-ownership/data

---

## Heading levels should only increase by one (WCAG criterion undetermined)

**Bug ID:** `VS-32eef4c9`  
**Pattern ID:** `VS-d25f622d`  
**URL:** https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs  
**XPath / selector:** `.apiDocsContainer.container:nth-child(1) > .row > .col > h3`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `heading-order` ([reference](https://dequeuniversity.com/rules/axe/4.12/heading-order?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 370 instances; 304 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<h3>Dataset Information</h3>
```

### Description
Heading levels should only increase by one. Detected by axe-core rule heading-order on 304 of 2715 scanned pages (370 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs.
2. Locate the element: .apiDocsContainer.container:nth-child(1) > .row > .col > h3
3. Confirm the axe-core finding for rule heading-order.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-service-type-reports/medicare-telehealth-trends/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/summary-statistics-on-beneficiary-enrollment
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs
- https://data.cms.gov/datasets?keyword%5B0%5D=Average&page=2
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/next-generation-accountable-care-organization-model-data/api-docs
- https://data.cms.gov/resources/medicare-service-type-reports-methodology
- https://data.cms.gov/datasets?page=8&theme%5B0%5D=Hospitals
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-hospice-by-geography-and-provider/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-supplier/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/physiciansupplier-procedure-summary/api-docs
- https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/medicare-clinical-laboratory-fee-schedule-private-payer-rates-and-volumes/api-docs
- https://data.cms.gov/resources/nursing-home-affiliated-entity-performance-measures-methodology
- https://data.cms.gov/datasets?page=3&theme%5B0%5D=Dialysis+facilities
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-provider-and-drug/api-docs
- https://data.cms.gov/resources/next-generation-aco-model-data-methodology
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-geography-and-drug/api-docs
- https://data.cms.gov/datasets?keyword%5B0%5D=Quality&page=3
- https://data.cms.gov/resources/fee-for-service-public-provider-enrollment-methodology-q1-2023-q2-2025
- https://data.cms.gov/provider-data/topics/dialysis-facilities/measures
- https://data.cms.gov/datasets?page=3

…and more — 304 pages total ([download CSV](csv/axe-core__heading-order.csv)).

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use heading levels in order (h1 → h2 → h3) without skipping; structure, not size.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/heading-order?application=axeAPI

### Example pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners/medicare-physician-other-practitioners-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-service-type-reports/medicare-telehealth-trends/api-docs

---

## Landmarks should have a unique role or role/label/title (i.e. accessible name) c (WCAG criterion undetermined)

**Bug ID:** `VS-cb448647`  
**Pattern ID:** `VS-8806389c`  
**URL:** https://data.cms.gov/tools/medicare-part-d-drug-spending-dashboard  
**XPath / selector:** `.desktop`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `landmark-unique` ([reference](https://dequeuniversity.com/rules/axe/4.12/landmark-unique?application=axeAPI))  
**Severity:** Moderate  
**Frequency:** 18 instances; 18 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<nav aria-label="breadcrumb" class="DatasetHero__breadcrumb desktop">
```

### Description
Landmarks should have a unique role or role/label/title (i.e. accessible name) c. Detected by axe-core rule landmark-unique on 18 of 2715 scanned pages (18 instances).

### Steps to reproduce
1. Open https://data.cms.gov/tools/medicare-part-d-drug-spending-dashboard.
2. Locate the element: .desktop
3. Confirm the axe-core finding for rule landmark-unique.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/tools/medicare-part-d-drug-spending-dashboard
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/tools/medicaid-managed-care-dashboard
- https://data.cms.gov/tools/geographic-variation-in-standardized-medicare-spending-state
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-d-spending-by-drug
- https://data.cms.gov/tools/market-saturation-utilization-state-county-mapping-tool
- https://data.cms.gov/tools/mapping-medicare-disparities-by-population
- https://data.cms.gov/tools/geographic-variation-in-standardized-medicare-spending-county
- https://data.cms.gov/tools/medicare-revalidation-list
- https://data.cms.gov/tools/mapping-disparities-by-social-determinants-of-health
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-quarterly-part-b-spending-by-drug
- https://data.cms.gov/tools/mapping-medicare-disparities-by-hospital
- https://data.cms.gov/tools/medicare-inpatient-hospital-look-up-tool
- https://data.cms.gov/tools/medicare-enrollment-dashboard
- https://data.cms.gov/tools/medicare-physician-other-practitioner-look-up-tool
- https://data.cms.gov/tools/market-saturation-utilization-core-based-statistical-areas-mapping-tool
- https://data.cms.gov/tools/medicaid-drug-spending-dashboard
- https://data.cms.gov/tools/medicare-part-b-drug-spending-dashboard

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** When a landmark role/type repeats (e.g. two <nav>s), give each a distinct accessible name with aria-label or aria-labelledby (e.g. "Primary" and "Footer" navigation) so screen-reader users can tell them apart.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/landmark-unique?application=axeAPI

### Example pages
- https://data.cms.gov/tools/medicare-part-d-drug-spending-dashboard
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/tools/medicaid-managed-care-dashboard

---

## Table header text should not be empty (WCAG criterion undetermined)

**Bug ID:** `VS-7fb0a240`  
**Pattern ID:** `VS-d69fc059`  
**URL:** https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology  
**XPath / selector:** `.ArticleSection__component-container:nth-child(5) > .DynamicTable > .container > .row > .offset-lg-3.col > .DynamicTable__inner > .DynamicTable__table-wrapper > .DynamicTable__table > thead > tr > .default-header:nth-child(1)`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `empty-table-header` ([reference](https://dequeuniversity.com/rules/axe/4.12/empty-table-header?application=axeAPI))  
**Severity:** Minor  
**Frequency:** 9 instances; 4 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<th class="CellRenderer__cell default-header" style="width: 114px;"><div id="RichTextField-9c35d4eb-1066-42fd-8b9e-834e9eac5a66" class="RichTextField"> </div></th>
```

### Description
Table header text should not be empty. Detected by axe-core rule empty-table-header on 4 of 2715 scanned pages (9 instances).

### Steps to reproduce
1. Open https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology.
2. Locate the element: .ArticleSection__component-container:nth-child(5) > .DynamicTable > .container > .row > .offset-lg-3.col > .DynamicTable__inner > .DynamicTable__table-wrapper > .DynamicTable__table > thead > tr > .default-header:nth-child(1)
3. Confirm the axe-core finding for rule empty-table-header.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology
- https://data.cms.gov/provider-data/topics/nursing-homes/quality-measures
- https://data.cms.gov/provider-data/topics/home-health-services/measuring-agency-performance
- https://data.cms.gov/resources/geographic-variation-methodology-2018

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/empty-table-header?application=axeAPI

### Example pages
- https://data.cms.gov/resources/2018-value-modifier-performance-year-2016-methodology
- https://data.cms.gov/provider-data/topics/nursing-homes/quality-measures
- https://data.cms.gov/provider-data/topics/home-health-services/measuring-agency-performance

---

## Headings should not be empty (WCAG criterion undetermined)

**Bug ID:** `VS-7409bf80`  
**Pattern ID:** `VS-0066c67d`  
**URL:** https://data.cms.gov/provider-data/topics/hospitals/timely-effective-care  
**XPath / selector:** `h2:nth-child(27)`  
**WCAG SC:** _undetermined_  
**Rule:** axe-core — `empty-heading` ([reference](https://dequeuniversity.com/rules/axe/4.12/empty-heading?application=axeAPI))  
**Severity:** Minor  
**Frequency:** 2 instances; 2 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### HTML snippet
```html
<h2 id="hospital-harm"><span>&nbsp;</span></h2>
```

### Description
Headings should not be empty. Detected by axe-core rule empty-heading on 2 of 2715 scanned pages (2 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/topics/hospitals/timely-effective-care.
2. Locate the element: h2:nth-child(27)
3. Confirm the axe-core finding for rule empty-heading.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-data/topics/hospitals/timely-effective-care
- https://data.cms.gov/provider-compliance/independent-dispute-resolution

### Testing environment
Automated: axe-core, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Remove empty headings or give them text. Don't use heading tags for spacing.

See remediation guidance: https://dequeuniversity.com/rules/axe/4.12/empty-heading?application=axeAPI

### Example pages
- https://data.cms.gov/provider-data/topics/hospitals/timely-effective-care
- https://data.cms.gov/provider-compliance/independent-dispute-resolution

---

## First focusable element is link to main content (WCAG criterion undetermined)

**Bug ID:** `VS-4be8d89e`  
**Pattern ID:** `VS-aa242c2d`  
**URL:** https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics  
**XPath / selector:** `{"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r87` ([reference](https://alfa.siteimprove.com/rules/sia-r87))  
**Severity:** Moderate  
**Frequency:** 708 instances; 708 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
First focusable element is link to main content. Detected by Siteimprove Alfa rule sia-r87 on 708 of 2715 scanned pages (708 instances).

### Steps to reproduce
1. Open https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics.
2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
3. Confirm the Siteimprove Alfa finding for rule sia-r87.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/provider-summary-by-type-of-service/provider-service-classifications/restructured-betos-classification-system/data
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/hospital-enrollments/data
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/federally-qualified-health-center-all-owners/data/q1-2025
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/provider-of-services-file-internet-quality-improvement-and-evaluation-system/data/q1-2025
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-spending-by-drug/medicare-part-b-spending-by-drug/data
- https://data.cms.gov/resources/value-modifier-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-geography-and-service/data/2018
- https://data.cms.gov/resources/aco-reach-financial-and-quality-results-data-dictionary
- https://data.cms.gov/resources/minimum-data-set-frequency-methodology
- https://data.cms.gov/quality-of-care/payroll-based-journal-employee-detail-nursing-home-staffing/data/q3-2024
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-provider-and-drug/data/2022
- https://data.cms.gov/resources/county-level-aggregate-expenditure-and-risk-score-data-on-assignable-beneficiaries-methodology-2021-2023
- https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-home-health-agency-by-geography-and-provider
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs
- https://data.cms.gov/datasets?keyword%5B0%5D=Average&page=2
- https://data.cms.gov/resources/medicare-service-type-reports-methodology
- https://data.cms.gov/datasets?page=8&theme%5B0%5D=Hospitals

…and more — 708 pages total ([download CSV](csv/alfa__sia-r87.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r87

### Example pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider

---

## aria attribute is permitted for element role (WCAG criterion undetermined)

**Bug ID:** `VS-199fe2c5`  
**Pattern ID:** `VS-e05344b9`  
**URL:** https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics  
**XPath / selector:** `@aria-label="Open Nursing Home Chain Performance Measures"`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r18` ([reference](https://alfa.siteimprove.com/rules/sia-r18))  
**Severity:** Moderate  
**Frequency:** 850 instances; 215 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
aria attribute is permitted for element role. Detected by Siteimprove Alfa rule sia-r18 on 215 of 2715 scanned pages (850 instances).

### Steps to reproduce
1. Open https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics.
2. Locate the element: @aria-label="Open Nursing Home Chain Performance Measures"
3. Confirm the Siteimprove Alfa finding for rule sia-r18.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/opt-out-affidavits
- https://data.cms.gov/resources/value-modifier-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-prescriber-look-up-tool
- https://data.cms.gov/resources/aco-reach-financial-and-quality-results-data-dictionary
- https://data.cms.gov/resources/minimum-data-set-frequency-methodology
- https://data.cms.gov/resources/medicare-part-d-prescribers-by-provider-and-drug-data-dictionary
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-home-health-agency-by-geography-and-provider
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-premium-reports/cms-program-statistics-medicare-premiums
- https://data.cms.gov/resources/medicare-pac-utilization-snf-by-geography-and-provider-data-dictionary
- https://data.cms.gov/provider-compliance/public-reporting-of-missing-digital-contact-information
- https://data.cms.gov/resources/deficit-reduction-act-dra-hospital-acquired-condition-hac-measures-methodology
- https://data.cms.gov/summary-statistics-on-beneficiary-enrollment/health-insurance-marketplace/health-insurance-exchanges-monthly-effectuated-enrollment
- https://data.cms.gov/summary-statistics-on-use-and-payments/medicare-medicaid-service-type-reports/medicare-home-health-patients-and-visits-by-state
- https://data.cms.gov/resources/medicare-part-b-spending-by-drug-data-dictionary
- https://data.cms.gov/resources/medicaid-opioid-prescribing-rates-by-geography-data-dictionary-0
- https://data.cms.gov/resources/opt-out-affidavits-methodology
- https://data.cms.gov/resources/home-health-agency-cost-report-data-dictionary
- https://data.cms.gov/tools/medicare-part-d-drug-spending-dashboard
- https://data.cms.gov/cms-innovation-center-programs/disease-episode-based-payment-models/medicare-alternative-payment-model-adoption
- https://data.cms.gov/resources/next-generation-aco-model-data-methodology
- https://data.cms.gov/tools/provider-opt-out-affidavits-look-up-tool
- https://data.cms.gov/resources/acos-aco-participants-and-snf-affiliates-methodology

…and more — 215 pages total ([download CSV](csv/alfa__sia-r18.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Only use ARIA states/properties that are allowed on this element/role.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r18

### Example pages
- https://data.cms.gov/quality-of-care/long-term-care-facility-characteristics
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider
- https://data.cms.gov/cms-innovation-center-programs/cms-innovation-models-overview/innovation-center-model-summary-information

---

## Headings are structured hierarchically (WCAG criterion undetermined)

**Bug ID:** `VS-e94d6384`  
**Pattern ID:** `VS-f054f4a4`  
**URL:** https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs  
**XPath / selector:** `<h3>`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r53` ([reference](https://alfa.siteimprove.com/rules/sia-r53))  
**Severity:** Moderate  
**Frequency:** 180 instances; 151 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Headings are structured hierarchically. Detected by Siteimprove Alfa rule sia-r53 on 151 of 2715 scanned pages (180 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs.
2. Locate the element: <h3>
3. Confirm the Siteimprove Alfa finding for rule sia-r53.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs
- https://data.cms.gov/datasets?keyword%5B0%5D=Average&page=2
- https://data.cms.gov/resources/medicare-service-type-reports-methodology
- https://data.cms.gov/datasets?page=8&theme%5B0%5D=Hospitals
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-post-acute-care-hospice/medicare-post-acute-care-utilization-hospice-by-geography-and-provider/api-docs
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-durable-medical-equipment-devices-supplies/medicare-durable-medical-equipment-devices-supplies-by-supplier/api-docs
- https://data.cms.gov/summary-statistics-on-use-and-payments/physiciansupplier-procedure-summary/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/medicare-clinical-laboratory-fee-schedule-private-payer-rates-and-volumes/api-docs
- https://data.cms.gov/datasets?page=3&theme%5B0%5D=Dialysis+facilities
- https://data.cms.gov/resources/next-generation-aco-model-data-methodology
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-part-d-prescribers/medicare-part-d-prescribers-by-geography-and-drug/api-docs
- https://data.cms.gov/datasets?keyword%5B0%5D=Quality&page=3
- https://data.cms.gov/datasets?page=3
- https://data.cms.gov/resources/medicare-inpatient-hospitals-by-provider-data-dictionary-2013-2016
- https://data.cms.gov/resources/medicare-covid-19-cases-hospitalizations-data-dictionary
- https://data.cms.gov/quality-of-care/payroll-based-journal-employee-detail-nursing-home-staffing/api-docs
- https://data.cms.gov/quality-of-care/medicare-dialysis-facilities/api-docs
- https://data.cms.gov/quality-of-care/dialysis-facilities
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-inpatient-hospitals/medicare-inpatient-hospitals-by-provider/api-docs
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/order-and-referring/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-all-owners/api-docs
- https://data.cms.gov/resources/hospital-provider-cost-report-methodology
- https://data.cms.gov/resources/aco-reach-aligned-beneficiaries-data-dictionary-2021-2023

…and more — 151 pages total ([download CSV](csv/alfa__sia-r53.csv)).

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
**How to fix:** Use headings in a logical, non-skipping order.

See remediation guidance: https://alfa.siteimprove.com/rules/sia-r53

### Example pages
- https://data.cms.gov/provider-summary-by-type-of-service/medicare-outpatient-hospitals/medicare-outpatient-hospitals-by-provider-and-service/api-docs
- https://data.cms.gov/provider-characteristics/hospitals-and-other-facilities/skilled-nursing-facility-change-of-ownership/api-docs
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models/aco-reach-providers/api-docs

---

## Element with orientation is not locked (WCAG criterion undetermined)

**Bug ID:** `VS-229d2a35`  
**Pattern ID:** `VS-7fbb8b20`  
**URL:** https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/june-2-2026  
**XPath / selector:** `{"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r59` ([reference](https://alfa.siteimprove.com/rules/sia-r59))  
**Severity:** Moderate  
**Frequency:** 17 instances; 17 of 2715 pages affected
  
**History:** first seen 2026-W28, last seen 2026-W30 (3 weeks)

### Description
Element with orientation is not locked. Detected by Siteimprove Alfa rule sia-r59 on 17 of 2715 scanned pages (17 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/june-2-2026.
2. Locate the element: {"type":"document","children":[{"type":"type","name":"html","publicId":null,"sys
3. Confirm the Siteimprove Alfa finding for rule sia-r59.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/june-2-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/order-and-referring/data/june-23-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/data/june-16-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/june-16-2026
- https://data.cms.gov/resources/medicare-alternative-payment-model-adoption-methodology
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-non-physicians/data/may-26-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-non-physicians/data/june-30-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/data/july-2-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/july-14-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/data/june-5-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-non-physicians/data
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/data/may-29-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-non-physicians/data/july-7-2026
- https://data.cms.gov/cms-innovation-center-programs/accountable-care-models
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/api-docs
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/june-18-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/data/june-18-2026

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r59

### Example pages
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/pending-initial-logging-and-tracking-physicians/data/june-2-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/order-and-referring/data/june-23-2026
- https://data.cms.gov/provider-characteristics/medicare-provider-supplier-enrollment/fiscal-intermediary-shared-system-attending-and-rendering/data/june-16-2026

---

## Table header has scope (WCAG criterion undetermined)

**Bug ID:** `VS-f8c2f109`  
**Pattern ID:** `VS-2cd767ca`  
**URL:** https://data.cms.gov/quality-of-care  
**XPath / selector:** `<h5 class="typeface-05-h5-desktop-regular-white MoreTopicCarouselCard__count">`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r78` ([reference](https://alfa.siteimprove.com/rules/sia-r78))  
**Severity:** Moderate  
**Frequency:** 31 instances; 7 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Table header has scope. Detected by Siteimprove Alfa rule sia-r78 on 7 of 2715 scanned pages (31 instances).

### Steps to reproduce
1. Open https://data.cms.gov/quality-of-care.
2. Locate the element: <h5 class="typeface-05-h5-desktop-regular-white MoreTopicCarouselCard__count">
3. Confirm the Siteimprove Alfa finding for rule sia-r78.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/quality-of-care
- https://data.cms.gov/
- https://data.cms.gov/summary-statistics-on-provider-enrollment
- https://data.cms.gov/provider-compliance
- https://data.cms.gov/medicare-value-based-payment-modifier-program
- https://data.cms.gov/covid-19
- https://data.cms.gov/collection/synthetic-medicare-enrollment-fee-for-service-claims-and-prescription-drug-event

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r78

### Example pages
- https://data.cms.gov/quality-of-care
- https://data.cms.gov/
- https://data.cms.gov/summary-statistics-on-provider-enrollment

---

## Presentational attribute (use CSS) (WCAG criterion undetermined)

**Bug ID:** `VS-a7b9fe52`  
**Pattern ID:** `VS-04a9d28c`  
**URL:** https://data.cms.gov/provider-data/topics/hospitals/complications-deaths  
**XPath / selector:** `table`  
**WCAG SC:** _undetermined_  
**Rule:** deprecated-html — `presentational-attr`  
**Severity:** Moderate  
**Frequency:** 809 instances; 3 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (6 weeks)

### HTML snippet
```html
<table cellpadding="0" cellspacing="0"><tbody><tr><td colspan="5" valign="middle"><strong><span>Complication Measure Performance Categories</span></strong></td></tr><tr><td valign="top"><strong><span>
```

### Description
Presentational attribute (use CSS). Detected by deprecated-html rule presentational-attr on 3 of 2715 scanned pages (809 instances).

### Steps to reproduce
1. Open https://data.cms.gov/provider-data/topics/hospitals/complications-deaths.
2. Locate the element: table
3. Confirm the deprecated-html finding for rule presentational-attr.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/provider-data/topics/hospitals/complications-deaths
- https://data.cms.gov/provider-data/topics/hospitals/ambulatory-surgical-centers
- https://data.cms.gov/provider-data/topics/hospitals/measures-and-current-data-collection-periods

### Testing environment
Automated: deprecated-html, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
Not captured by automated scan — requires manual testing.

### Example pages
- https://data.cms.gov/provider-data/topics/hospitals/complications-deaths
- https://data.cms.gov/provider-data/topics/hospitals/ambulatory-surgical-centers
- https://data.cms.gov/provider-data/topics/hospitals/measures-and-current-data-collection-periods

---

## Scrolling content can be accessed by keyboard (WCAG criterion undetermined)

**Bug ID:** `VS-3afdf6f4`  
**Pattern ID:** `VS-c18be945`  
**URL:** https://data.cms.gov/tools/mapping-medicare-disparities-by-population  
**XPath / selector:** `text: "Population View"`  
**WCAG SC:** _undetermined_  
**Rule:** Siteimprove Alfa — `sia-r57` ([reference](https://alfa.siteimprove.com/rules/sia-r57))  
**Severity:** Moderate  
**Frequency:** 8420 instances; 2 of 2715 pages affected
  
**History:** first seen 2026-W24, last seen 2026-W30 (7 weeks)

### Description
Scrolling content can be accessed by keyboard. Detected by Siteimprove Alfa rule sia-r57 on 2 of 2715 scanned pages (8420 instances).

### Steps to reproduce
1. Open https://data.cms.gov/tools/mapping-medicare-disparities-by-population.
2. Locate the element: text: "Population View"
3. Confirm the Siteimprove Alfa finding for rule sia-r57.

### Impact
Not captured by automated scan — requires manual testing.

### Affected pages
- https://data.cms.gov/tools/mapping-medicare-disparities-by-population
- https://data.cms.gov/tools/mapping-medicare-disparities-by-hospital

### Testing environment
Automated: Siteimprove Alfa, headless Chromium (Playwright). Manual AT verification: Not captured by automated scan — requires manual testing.

### Suggested fix
See remediation guidance: https://alfa.siteimprove.com/rules/sia-r57

### Example pages
- https://data.cms.gov/tools/mapping-medicare-disparities-by-population
- https://data.cms.gov/tools/mapping-medicare-disparities-by-hospital