Release history
Changelog
Every data ingest and material site change, newest first. Ingest entries are written by the refresh pipeline; prior vintages of each file are archived under data downloads so old citations stay reproducible.
| Date | Type | Change | Vintage |
|---|---|---|---|
| July 20, 2026 | site | Second integrity pass: county penetration now shows a graded ±1σ reliability band (replacing the hard 20k cliff) with robust/moderate/thin tiers; the modeled growth-runway score is normalized to the 95th-percentile market so a single outlier no longer sets the scale; and compare mode respects the velocity noise-gate and updates its tab title/description per selection. | — |
| July 20, 2026 | site | Analytics-integrity hardening ahead of full county rollout: YoY velocity now carries a per-county stability band (sqrt(2p(1-p)/N)) and directional color/arrows are suppressed for moves within noise; thin or low-reliability county pages are gated to noindex,follow (and dropped from the sitemap) to protect domain authority; and the modeled growth-runway score now highlights each state's dominant driver by percentile so a high score is explainable, never a black box. | — |
| July 20, 2026 | site | County pipeline extended for full-coverage drill-down: refresh_cms_data.py --counties now layers Census ACS 5-year 65+ population onto every county, and optional CPSC (carrier count, top carrier, D-SNP share) and MA/PDP landscape ($0-premium availability) enrichment when the CMS source files are supplied. Each layer stamps its own provenance; county pages render the new fields only where present, so an unenriched county never shows an invented number. | — |
| July 18, 2026 | site | County drill-down launched: every state page now links to per-county pages at /market/states/{state}/{county}/ with penetration trajectory, market structure, D-SNP share, So what / Now what, provenance, and neighboring-county links. New homepage “Find your market” state→county browser (works without JavaScript), a multi-market “Your markets” watchlist, and a Compare-markets tool (/market/compare/) for side-by-side states and counties with shareable URLs. A new full-coverage county ingest (refresh_cms_data.py --counties, CMS Monthly Enrollment county file, registered as ma_county_penetration) extends county pages to every U.S. county on the next data run; small-population counties are flagged for reliability. | — |
| July 17, 2026 | site | New Sales intelligence hub for payer sales organizations, pointed at AEP 2027 and plan years 2027-2028: a 2027 disruption pipeline (dated CMS events with an AEP 2027 play and a 2028 setup per event), AEP 2027 target markets with a CRM-ready CSV, growth runway index (modeled, labeled), whitespace counties, per-carrier vulnerability battlecards, and a D-SNP deployment map. Also: downloadable state sales playbook one-pagers, a sales trigger watch in briefings, and glossary entries for AEP, OEP, SEP, LIS, ANOC, disenrollment rate, and runway score. | — |
| July 17, 2026 | site | Site update: newsletter signup form, About/Privacy/Terms pages, glossary, bulk data-download index, per-vintage CSV archive, Atom feed for briefings, structured data, and social share cards. Star-movement page now shows official October ratings only. | — |
| July 1, 2026 | ingest | CMS policy developments reviewed and updated through July 2026. source → | Through July 2026 |
| June 15, 2026 | ingest | CMS Medicare Monthly Enrollment for February 2026 ingested — state penetration table, national basis figures, and all dependent pages refreshed. source → | February 2026 |
| June 15, 2026 | ingest | National MA vs Original Medicare series extended with February 2026 enrollment. source → | Plan year 2026 (Feb 2026 enrollment) |
| May 1, 2026 | ingest | County-level market snapshot refreshed for 76 tracked counties (CPSC files), with 2023–2026 penetration history. source → | Plan year 2026 |
| May 1, 2026 | ingest | Carrier footprint by state refreshed from March 2026 contract enrollment. source → | March 2026 |
| May 1, 2026 | ingest | SNP share of MA enrollment by state refreshed from the SNP Comprehensive Report. source → | February 2026 |
| April 15, 2026 | ingest | Modeled PMPM benefit-value series re-estimated against CY2026 landscape files (modeled — directional only). source → | Plan years 2022–2026 |
| April 7, 2026 | ingest | CY2026 Part D benefit parameters and IRA negotiated-price list finalized and ingested. source → | CY2026 final parameters |
| March 15, 2026 | ingest | Dual-eligible density by state refreshed from MMCO 2025 Q4 data. source → | 2025 Q4 |
| February 15, 2026 | ingest | Regulatory reference library updated through the 2027 Advance Notice. source → | Current through 2027 Advance Notice (Feb 2026) |
| February 10, 2026 | ingest | 2026 Star Ratings (published October 2025) ingested — carrier trajectories and measure-level erosion updated. source → | 2026 Star Ratings (published Oct 2025) |
| January 20, 2026 | ingest | 2026 plan exits and January member-migration reconciliation ingested. source → | Plan year 2026 |
Get the 5 biggest shifts in Medicare data, monthly
One email per CMS release cycle: what changed in the new data, the five largest market shifts, and links to the updated answers. No product news, no filler.
No spam, unsubscribe anytime. See the privacy policy. Latest issue: Data release briefings →