Independent Medicare market intelligence · Public CMS data · April 2026 county file, ingested July 31, 2026
Medicare market answers you can defend in the room.
Built on named CMS datasets for brokers planning AEP, strategy and finance teams sizing markets, and analysts who need the source file. Free to read without an account.
Find your market
Type a state or county to jump straight to it, start from one of the largest markets, or open the explorer for all 3,199 counties. April 2026 CMS county file.
No state or county matches that. Search all 3,199 counties →
Explore all 3,199 counties → filter by health plan share, momentum and market size. Weighing more than one? Compare markets side by side →
Browse markets
Largest markets
Medicare beneficiaries, CMS state record, April 2026
- California7,218,783
- Florida5,319,022
- Texas4,999,773
- New York4,042,202
- Pennsylvania3,030,753
Highest MA & other health plan share
CMS state record, April 2026
- Puerto Rico86.7%
- Michigan63.6%
- Alabama61.4%
- Rhode Island59.9%
- Maine58.9%
Fastest growing
12-month change in share, counties with 20,000+ beneficiaries
- Caddo Parish, LA+4.4 pts
- Webb County, TX+3.1 pts
- Craven County, NC+2.5 pts
- Onslow County, NC+2.5 pts
- San Juan County, NM+2.4 pts
Most headroom
Lowest share, counties with 20,000+ beneficiaries
Browse all states and counties → the full directory, all 53 jurisdictions and 3,199 counties.
What you can use today
Live capabilities only. Everything in beta or planned is on the roadmap, not in this list.
Competitive
Go to market
Policy and provenance
This cycle's headline numbers
live static extract derived curated modeled Source data, derived metrics and models — what these labels mean →
Start from your task
Jump straight to the answer set that matches the work in front of you.
What is free, and what a free account adds
Nothing is charged for while MedicareInsights is in beta, and no card is taken. Every published figure is readable without an account; an account changes what you can do with the data, never what you can see.
Free, no account
- Every state, jurisdiction, county, methodology and policy page, in full
- Every chart, its provenance panel, its data table and its ready-made citation
- Copy any chart as a PNG
- The published CSV files on Data downloads, complete and unfiltered
- The weekly market brief and the monthly data-release briefing
A free beta account adds
- County drill-downs with full history, advanced filters and the full chart library
- Complete filtered CSV exports from the county and SNP explorers — without an account a filtered export returns a 50-row sample, labelled as capped inside the file
- The full Market and Marketing Opportunity Score tables (the top 25 rows without)
- Comparison of up to 5 markets instead of 2, and higher save limits (50 markets, 50 analyses, 25 alert rules, against 3, 2 and 1)
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Built to be cited
Most Medicare stats you'll find online are undated and unsourced. Every figure here names its source, its vintage and which of the three kinds of number it is.
Named sources & vintages
Every figure names its CMS file and states its data vintage — Monthly Enrollment, CPSC, Star Ratings, Part D parameters. No undated charts, anywhere.Provenance on every chart
An expandable panel under each figure: method, basis notes, limitations, and a link to the exact CMS source file.Source, derived or modeled
Source data, metrics derived from it by a published formula, and modeled or forecast values are labeled apart — so you know exactly what kind of number you're quoting.So what / Now what
Each answer ends with what the number means and the concrete next moves — pre-formatted citation included, ready for your deck.Where the line is. MedicareInsights supports research, market analysis, strategy development and presentation work. It is not a regulatory, compliance, actuarial or filing source: validate any figure against the named CMS file before using it in a filing, a bid, a rate submission or a compliance process, and never cite a modeled figure as CMS data. This matches the Terms of use, which exclude legal, actuarial, investment, compliance and medical advice.