September 2026 data briefing: June 2026 enrollment and September 2026 SNP ingested
Data through June 2026 (enrollment) and September 2026 (SNP) · ingested September 26, 2026live
The June 2026 Medicare Monthly Enrollment file and the September 2026 SNP Comprehensive Report are live across the site. Six things worth knowing from this cycle, each linked to the page that shows it.
What changed in this release
| # | Change | Where to look |
|---|---|---|
| 1 | The national MA & other health plan share is 51.1% on the CMS national record (36,106,704 of 70,609,057 beneficiaries). Year-on-year figures now compare June 2025 with June 2026. | National trend |
| 2 | CMS restated April 2026 after the previous ingest: its current national record is 36,003,398 of 70,479,609, against 36,012,033 of 70,408,037 published here before, and 27 of 3,199 county records still match the earlier file. | Methodology |
| 3 | Two counties (Sheridan County, MT and Hayes County, NE) have a CMS-suppressed June 2026 count. Their share and score inputs show as unavailable, never zero, and they are left out of county sums. | County explorer |
| 4 | September 2026 SNP Comprehensive Report: 8,453,338 people in a Special Needs Plan, 6,486,061 of them in a D-SNP, across 347 D-SNP contracts and 1,082 D-SNP plans. | SNP enrollment |
| 5 | The national D-SNP market-sizing proxy moves from 51.8% to 52.4% on the same 49-jurisdiction basis, mostly because the dual denominator moved to June 2026. It is a cross-vintage sizing indicator, not an enrollment rate. | D-SNP marketing |
| 6 | The Competitive Lens now loads the September 2026 CPSC month and the CMS Plan Crosswalk 2026, so plan continuations are CMS-confirmed where CMS lists a successor. | Entries & exits |
Derived layers (Market Opportunity Score, Marketing Opportunity Score, county, state and national pages) were recomputed on the new inputs with unchanged methods. Full technical notes are in the changelog. Prior files stay on Data downloads so existing citations still resolve. Previous release: the July 31, 2026 ingest (superseded).