Compare markets side by side
Pick two or three markets — any mix of states and counties — and compare them on penetration, momentum, D-SNP share, and carrier concentration. Each figure keeps its CMS source and vintage. Links are shareable: your selection is stored in the URL.
Penetration: CMS Medicare Monthly Enrollment / CPSC county file. D-SNP share: February 2026 (state) · Plan year 2026, with 2023–2026 penetration history (county). Carrier count and stars are the curated major-carrier extract (March 2026); county velocity is a simple YoY penetration-point change. Blank cells mean that figure isn't tracked at that geography yet — never assume zero.
Top states by MA penetration
Interactive side-by-side comparison needs JavaScript. Here is the citable baseline table; the full list is on the state penetration page.
| State | Penetration | Rank | Market type |
|---|---|---|---|
| Puerto Rico | 82.1% | 1 | Switcher |
| Florida | 64.7% | 2 | Switcher |
| Arizona | 63.4% | 3 | Switcher |
| Kentucky | 61.4% | 4 | Switcher |
| Nevada | 61% | 5 | Switcher |
| New Mexico | 60.6% | 6 | Switcher |
| Tennessee | 60.5% | 7 | Switcher |
| Maryland | 60.4% | 8 | Switcher |
| Indiana | 60.3% | 9 | Switcher |
| Delaware | 60% | 10 | Switcher |
| Louisiana | 59.6% | 11 | Switcher |
| South Carolina | 59.6% | 12 | Switcher |
Penetration as of February 2026.
So what / Now what
Side-by-side comparison is how you turn "which market?" into a defensible pick — same metrics, same vintages, no cherry-picking. Conversion markets (sub-50% penetration) reward ageing-in and first-time-switcher plays; switcher markets reward benefit and network competition against incumbents.
- Start from find your market to locate states and counties, then add them here.
- Benchmark the full field on the state penetration table and fastest-growing counties.
- Sales teams: cross-reference the growth runway index and carrier battlecards.
Provenance — MA enrollment & penetration by state
- Source file
- CMS Medicare Monthly Enrollment (data.cms.gov, public API)
- Vintage
- February 2026
- Last updated
- June 15, 2026
- Refresh cadence
- Monthly (CMS publishes ~3 months in arrears)
- Method
- State-level rows pulled from the Medicare Monthly Enrollment API; MA share = MA_AND_OTH_BENES / TOT_BENES. Refreshed via automated pipeline from the CMS public API.
- Known limitations
- Penetration here is share of all Medicare beneficiaries (Parts A and/or B), not the KFF eligible-only basis, which runs ~4pts higher.