www.cms.gov: Lighthouse — week 2026-W40

95 pages sampled by Google Lighthouse (its own headless Chrome). Scores are 0–100 (higher is better); metrics are Core Web Vitals. Download: CSV (per-page scores) · JSON (AI-ready, includes recommendations) · Priority pages CSV · Priority pages JSON.

Trend

Lighthouse category scores over 17 weeks

Lighthouse category scores by week
Week	Performance	Accessibility	Best practices	SEO
2026-W24	66	100	100	92
2026-W25	64	100	96	100
2026-W26	64	100	96	100
2026-W27	61	100	96	100
2026-W28	57	100	96	100
2026-W29	62	100	100	92
2026-W30	61	100	100	69
2026-W31	63	100	100	92
2026-W32	57	100	96	100
2026-W33	56	100	96	100
2026-W34	55	100	96	100
2026-W35	58	100	96	100
2026-W36	59	100	92	100
2026-W37	57	100	96	100
2026-W38	57	100	96	100
2026-W39	55	100	96	100
2026-W40	57	100	88	92

History & Trends → Severity, Lighthouse and other measures across 17 weeks.

Performance impact

How far pages fall short of Google's "good" benchmarks: Largest Contentful Paint ≤ 2.5s and page weight ≤ 1.6 MB. Lower is better.

Avg extra LCP over 2.5s: 5.3s 76/95 pages over
Avg extra weight over 1.6 MB: 0.42 MB 71/137 pages over

Set page_loads_per_week for this target to also estimate total wasted time and data (the way daily-dap uses traffic counts).

Medians across sampled pages

Performance: 57/100
Accessibility: 100/100
Best practices: 88/100
SEO: 92/100
Agentic browsing: 99/100
Largest Contentful Paint: 7.3s
First Contentful Paint: 3.8s
Speed Index: 4.4s
Total Blocking Time: 0.3s
Cumulative Layout Shift: 0.062

Recommendations

Issues Lighthouse flagged across the 95 sampled page(s), beyond the headline scores — grouped by category and ranked by how many pages they affect. Estimated savings (transfer bytes or load time) are Lighthouse's own estimates where available. Accessibility audits are intentionally omitted; they overlap with the axe-core findings on the Accessibility page.

Performance

Performance recommendations from Lighthouse, by sampled pages affected.
Recommendation	Pages	Est. saving
Network dependency tree	95/95	—
Minimize main-thread work	83/95	36.0s
Render-blocking requests	77/95	155.8s
Reduce unused CSS	77/95	4.8 MB · 25.8s
Time to Interactive	77/95	—
Reduce JavaScript execution time	76/95	30.8s
Font display	76/95	4.7s
Largest Contentful Paint	76/95	—
First Contentful Paint	75/95	—
Reduce unused JavaScript	74/95	11.2 MB · 36.8s
Max Potential First Input Delay	72/95	—
Total Blocking Time	60/95	—
Use efficient cache lifetimes	57/95	167.3s
Speed Index	56/95	—
Avoid multiple page redirects	54/95	56.5s
Document request latency	48/95	27.0s
Initial server response time was short	38/95	20.3s
Minify CSS	34/95	276 KB · 1.3s
Page prevented back/forward cache restoration	33/95	—
Minify JavaScript	32/95	102 KB · 0.8s
Forced reflow	32/95	—
LCP request discovery	31/95	—
Layout shift culprits	28/95	—
Improve image delivery	18/95	20.6s
Legacy JavaScript	13/95	2.0s
LCP breakdown	3/95	—

Best Practices

Best Practices recommendations from Lighthouse, by sampled pages affected.
Recommendation	Pages	Est. saving
Serves images with low resolution	51/95	—
Missing source maps for large first-party JavaScript	32/95	—
Does not use HTTPS	30/95	—
Uses third-party cookies	18/95	—
Issues were logged in the `Issues` panel in Chrome Devtools	18/95	—
Page lacks the HTML doctype, thus triggering quirks-mode	18/95	—
Charset declaration is missing or occurs too late in the HTML	18/95	—
Browser errors were logged to the console	1/95	—

SEO

SEO recommendations from Lighthouse, by sampled pages affected.
Recommendation	Pages	Est. saving
Document does not have a meta description	41/95	—
Image elements do not have `[alt]` attributes	18/95	—
Page is blocked from indexing	7/95	—
Links do not have descriptive text	5/95	—
Links are not crawlable	1/95	—

Agentic (AI-readiness)

Agentic (AI-readiness) recommendations from Lighthouse, by sampled pages affected.
Recommendation	Pages	Est. saving
WebMCP tools registered	95/95	—
WebMCP form coverage	95/95	—
WebMCP schemas are valid	95/95	—
llms.txt follows recommendations	95/95	—
Cumulative Layout Shift	28/95	—

What the Agentic score means

The Agentic (AI-readiness) score is new in Google Lighthouse (13.4+). It measures how well a page works for AI agents and assistants — the tools that increasingly mediate how people find and use government services. It checks for things like an llms.txt file (a machine-readable guide for language models), valid structured data, a well-formed accessibility tree that agents can parse, and WebMCP tool/form descriptions. A higher score means an AI assistant is more likely to understand the page and complete tasks on a citizen's behalf correctly.

It is experimental and evolving; treat it as a forward-looking signal, not a compliance requirement. Median across sampled pages: 99/100.

Gaps found on the sampled pages: WebMCP tools registered (95), WebMCP form coverage (95), WebMCP schemas are valid (95), llms.txt follows recommendations (95), Cumulative Layout Shift (28).

Per-page results

Lighthouse scores and Core Web Vitals per sampled page (2026-W40). Agentic = experimental agentic-browsing score. PWA / offline readiness is tracked in the Standards tab (Lighthouse 12+ removed the PWA category). — click a column heading to sort

/medicare-coverage-database/view/article.aspx	53	100	78	100	100	10.4s	11.3s	10.4s	0.2s	0.007
/medicare/regulations-guidance/transmittals/2026-transmittals/r13945mpi	62	100	100	92	99	4.4s	9.2s	4.4s	0.2s	0.066
/medicare-coverage-database/view/ncacal-public-comments.aspx	51	100	96	100	100	3.8s	7.2s	3.8s	0.6s	0.048
/medicare-coverage-database/view/lcd.aspx	35	97	78	100	69	10.4s	11.4s	10.4s	0.2s	0.316
/medicare/medicaid-coordination/states/medicaid-integrity-program	50	100	59	92	94	2.3s	5.8s	5.9s	0.8s	0.11
/medicare/regulations-guidance/transmittals/2025-transmittals/r13364cp	48	100	77	92	100	5.4s	10.7s	5.4s	0.5s	0
/outreach-and-education/reach-out/find-tools-to-help-you-help-others/open-enrollment-outreach-and-media-materials	44	100	77	100	100	4.4s	10.9s	6.0s	0.7s	0
/icd10m/FY2023-version40-fullcode-cms/fullcode_cms/P0018.html	99	70	70	83	100	1.6s	1.6s	2.6s	0.0s	0
/medicare-coverage-database/view/lcd.aspx	59	97	78	100	73	2.2s	7.3s	3.0s	0.1s	0.264
/medicare-coverage-database/view/lcd.aspx	49	97	96	100	100	10.0s	10.6s	10.0s	0.3s	0
/medicare-coverage-database/search-results.aspx	52	100	96	92	100	7.5s	12.8s	7.5s	0.3s	0
/about-cms/who-we-are/leadership/digital-service-cms	59	100	100	92	100	4.8s	10.2s	4.8s	0.2s	0
/data-research	69	100	100	85	99	1.9s	5.8s	2.5s	0.3s	0.065
/privacy/third-party-privacy-policies	54	100	77	100	100	4.1s	11.1s	5.6s	0.4s	0
/medicare/enrollment-renewal/providers-suppliers	50	100	100	100	100	4.9s	12.3s	5.1s	0.5s	0
/icd10m/FY2026-fr-v43.1-fullcode-cms/fullcode_cms/P0668.html	99	62	70	83	100	1.6s	1.6s	1.6s	0.0s	0
/medicare/regulations-guidance/transmittals/2023-transmittals	53	100	100	69	53	1.8s	3.8s	2.6s	0.4s	0.803
/medicare-coverage-database/view/lcd.aspx	48	94	96	100	100	12.1s	13.0s	12.1s	0.3s	0
/icd10m/fy2025-version42.0-fullcode-cms/fullcode_cms/P0049.html	92	62	88	83	87	1.9s	1.9s	1.9s	0.0s	0.156
/marketplace/resources/fact-sheets-faqs	62	100	100	100	100	4.3s	9.0s	5.3s	0.1s	0
/priorities/innovation/innovation-models/making-care-primary	37	100	77	100	100	5.9s	13.4s	7.0s	1.0s	0
/medicare/regulations-guidance/transmittals/2023-transmittals/r12359cp	46	100	77	92	99	5.2s	10.8s	5.2s	0.6s	0.066
/icd10m/FY2026-fr-v43-fullcode-cms/fullcode_cms/P2001.html	75	62	88	83	100	2.0s	2.0s	4.5s	0.8s	0
/medicare-coverage-database/view/lcd.aspx	25	94	96	100	51	10.4s	11.2s	10.4s	0.3s	0.962
/about-cms/what-we-do/nursing-homes	86	100	100	92	94	1.8s	2.9s	2.9s	0.2s	0.106
/regulations-and-guidance/guidance/transmittals/transmittals/r10524pi	55	100	77	92	100	5.4s	13.2s	7.2s	0.2s	0
/medicare/regulations-guidance/transmittals/2026-transmittals	39	100	77	61	100	5.2s	12.9s	6.9s	0.8s	0
/medicare-coverage-database/view/lcd.aspx	47	97	96	100	100	10.2s	11.0s	10.2s	0.4s	0
/medicare-coverage-database/view/cal.aspx	56	97	92	100	100	10.3s	10.6s	10.3s	0.0s	0
/medicare-coverage-database/view/article.aspx	40	100	78	100	80	10.1s	11.3s	10.1s	0.3s	0.212
/medicare-coverage-database/view/ncacal-decision-memo.aspx	51	96	96	100	54	2.0s	7.3s	2.7s	0.1s	0.7
/acronyms	67	100	77	61	100	4.4s	5.2s	4.4s	0.2s	0
/regulations-and-guidance/guidance/transmittals/2018-transmittals-items/r4127cp	48	100	77	92	100	5.1s	12.0s	5.5s	0.5s	0
/medicare-coverage-database/view/article.aspx	52	100	78	92	99	10.2s	11.2s	10.2s	0.2s	0.062
/medicare-coverage-database/view/lcd.aspx	37	94	96	100	75	3.5s	4.4s	6.2s	1.1s	0.254
/medicare-coverage-database/view/article.aspx	48	97	96	100	100	10.0s	10.6s	10.0s	0.3s	0
/apps/ama/license.asp	68	99	77	61	88	1.9s	5.0s	2.8s	0.3s	0.15
/medicare-coverage-database/view/article.aspx	52	100	96	100	100	9.9s	10.6s	9.9s	0.2s	0
/icd10m/version36-fullcode-cms/fullcode_cms/P0050.html	99	70	70	83	100	1.7s	1.7s	1.7s	0.0s	0
/medicare/regulations-guidance/transmittals/2024-transmittals/r12558cp	64	100	100	92	100	4.4s	9.1s	4.4s	0.0s	0
/medicare-coverage-database/view/lcd.aspx	55	100	96	100	100	6.7s	12.0s	6.7s	0.2s	0
/medicare-coverage-database/view/article.aspx	68	100	78	92	98	3.0s	8.4s	3.0s	0.1s	0.074
/medicare/employers-plan-sponsors/creditable-coverage/disclosure-form	54	100	77	100	99	4.6s	9.7s	4.6s	0.4s	0.065
/icd10m/FY2023-version40-fullcode-cms/fullcode_cms/P0034.html	99	70	70	83	100	1.6s	1.6s	1.6s	0.1s	0
/icd10m/FY2026-nprm-version43-fullcode-cms/fullcode_cms/P0142.html	93	54	70	83	87	1.3s	1.3s	1.3s	0.0s	0.156
/medicare/coding-billing/skilled-nursing-facility-snf-consolidated-billing/2019-part-a-mac-update	65	100	100	100	95	1.8s	5.1s	2.7s	0.5s	0.098
/medicare-coverage-database/view/lcd.aspx	51	97	96	100	100	3.6s	4.0s	4.7s	1.9s	0
/medicare-coverage-database/view/lcd.aspx	48	97	78	100	73	4.0s	5.6s	13.6s	0.1s	0.265
/medicare/regulations-guidance/transmittals/2021-transmittals	35	100	77	69	100	5.3s	13.4s	6.6s	1.2s	0
/medicare/provider-enrollment-and-certification/guidanceforlawsandregulations/nursing-homes	90	100	100	100	96	1.8s	2.9s	2.4s	0.2s	0.095
/medical-bill-rights/help/guides	62	100	96	92	99	4.8s	11.5s	4.8s	0.1s	0.065
/about-cms/leadership/organization	68	100	100	100	99	1.8s	5.1s	2.4s	0.4s	0.067
/medicare/regulations-guidance/transmittals/2024-transmittals/r12493otn	67	100	81	92	98	2.1s	5.5s	2.5s	0.4s	0.071
/medicare-coverage-database/view/article.aspx	57	97	78	100	99	7.1s	11.1s	7.1s	0.1s	0.058
/nosurprises/privacy	49	98	59	100	100	5.5s	12.9s	7.3s	0.4s	0
/medicare/payment/fee-schedules/clinical-laboratory-fee-schedule-clfs	82	100	100	100	85	1.9s	2.2s	2.0s	0.3s	0.174
/medicare-coverage-database/view/lcd.aspx	40	94	78	100	70	3.4s	8.7s	17.6s	0.2s	0.301
/newsroom/press-releases/report-details-national-health-care-spending-increases-2001	56	100	77	100	100	4.4s	9.9s	4.5s	0.3s	0
/medicare-coverage-database/view/article.aspx	53	100	96	100	100	7.5s	13.0s	7.5s	0.2s	0
/icd10m/version38-fullcode-cms/fullcode_cms/P0661.html	96	70	88	83	100	2.1s	2.1s	2.8s	0.0s	0
/icd10m/version372-fullcode-cms/fullcode_cms/P0004.html	93	70	70	83	88	1.6s	1.7s	1.6s	0.1s	0.152
/medicare/forms-notices/cms-forms	71	100	100	100	95	1.8s	4.9s	2.4s	0.3s	0.098
/icd10m/version%20371r1-fullcode-cms/fullcode_cms/P0019.html	98	70	70	83	97	1.6s	1.6s	1.6s	0.0s	0.079
/medicare-coverage-database/view/lcd.aspx	36	97	96	100	72	10.0s	10.8s	10.0s	0.3s	0.279
/medicare/physician-fee-schedule/search/overview	49	98	100	92	83	2.6s	5.9s	3.0s	0.7s	0.184
/medicare/regulations-guidance/transmittals/2017-transmittals	46	100	100	69	100	5.0s	9.9s	5.0s	0.7s	0
/icd10m/version37-fullcode-cms/fullcode_cms/P0094.html	92	70	70	83	87	1.4s	1.4s	2.7s	0.1s	0.156
/newsroom/fact-sheets/no-surprises-act-independent-dispute-resolution-process-proposed-rule-fact-sheet	65	100	81	100	100	2.9s	6.4s	3.2s	0.3s	0.022
/medicare/coding-billing/therapy-services	70	100	100	100	99	1.8s	5.3s	2.5s	0.4s	0.065
/about-cms/contact/directory/ars-aberdeen-llc/1556326	44	100	77	92	100	4.4s	10.8s	6.0s	0.7s	0
/icd10m/FY2025-NPRM-Version42-fullcode-cms/fullcode_cms/P0148.html	99	70	88	83	100	1.6s	1.6s	1.6s	0.1s	0
/medicare-coverage-database/view/lcd.aspx	62	97	96	100	75	1.8s	7.1s	2.4s	0.1s	0.253
/icd10m/FY2026-fr-v43-fullcode-cms/fullcode_cms/P0358.html	99	62	88	83	100	1.6s	1.7s	1.6s	0.0s	0
/medicaid-chip/medicare-coordination/financial-alignment	78	98	100	100	99	1.8s	5.0s	1.8s	0.2s	0.066
/marketplace-private-insurance/resources/data-resources	75	100	100	100	85	1.7s	3.7s	1.8s	0.3s	0.174
/icd10m/version39-fullcode-cms/fullcode_cms/P0337.html	98	70	88	83	100	1.8s	1.8s	1.8s	0.1s	0.039
/about-cms/contact/directory/baymark-health-services-west-virginia-inc/1559231	68	100	100	92	99	1.8s	4.8s	2.4s	0.5s	0.065
/about-cms/contact/speaking-engagement-request-form	63	100	77	100	99	1.7s	5.0s	3.9s	0.6s	0.065
/medicare-coverage-database/view/article.aspx	52	100	78	100	99	10.3s	11.1s	10.3s	0.2s	0.062
/icd10m/version%20371r1-fullcode-cms/fullcode_cms/P0104.html	99	70	70	83	100	1.3s	1.3s	2.4s	0.1s	0
/medicare-coverage-database/view/lcd.aspx	34	94	96	100	75	10.1s	11.0s	10.1s	0.4s	0.249
/regulations-and-guidance/administrative-simplification/nationalprovidentstand	68	100	100	100	87	1.8s	4.2s	2.7s	0.4s	0.157
/medicare-coverage-database/details/nca-view-public-comments.aspx	53	100	96	100	100	3.4s	6.9s	3.4s	0.6s	0.033
/medicare/regulations-guidance/transmittals/2025-transmittals/r13095otn	58	100	100	92	99	5.1s	9.9s	5.1s	0.2s	0.066
/medicare/payment/prospective-payment-systems/hospital-outpatient-pps/quarterly-addenda-updates	54	100	100	92	94	4.7s	11.1s	4.7s	0.3s	0.108
/license/ama	62	99	100	61	100	4.1s	8.9s	4.1s	0.2s	0
/icd10m/FY2026-fr-v43-fullcode-cms/fullcode_cms/P0011.html	99	62	70	83	100	1.8s	1.8s	1.8s	0.0s	0
/regulations-and-guidance/guidance/transmittals/transmittals/r489pr1	61	100	77	92	95	2.0s	5.0s	2.5s	0.6s	0.102
/medicare-coverage-database/view/lcd.aspx	24	97	78	100	51	10.2s	11.1s	10.2s	0.3s	0.962
/medicare-coverage-database/reports/local-coverage-final-lcds-contractor-report.aspx	32	97	78	92	88	3.3s	10.8s	4.2s	2.9s	0.15
/icd10m/FY2024-version41-fullcode-cms/fullcode_cms/P0298.html	93	70	70	83	87	1.6s	1.7s	1.6s	0.0s	0.155
/icd10m/version372-fullcode-cms/fullcode_cms/P0641.html	98	70	70	83	100	1.9s	1.9s	1.9s	0.0s	0
/medicare-coverage-database/view/ncacal-public-comments.aspx	71	100	78	100	99	3.9s	5.1s	3.9s	0.1s	0.067
/priorities/health-equity/minority-health/resource-center/language/vietnamese-tieng-viet	51	98	81	92	100	4.6s	30.8s	12.9s	0.3s	0
/medicare-coverage-database/reports/local-coverage-final-lcds-state-report.aspx	32	97	96	92	100	4.0s	10.8s	6.1s	3.1s	0