MA Enrollment Explorer / Parent organizations / Baystate Health, Inc.
Baystate Health, Inc.: Medicare Advantage enrollment and market share
Baystate Health, Inc. had 15,007 Medicare Advantage members in October 2026, #90 nationally with 0.04% of all MA enrollment. It gained 2,180 members (+17.0%) since October 2025, and has enrollment in 2 states and 5 counties with 11 or more members, leading the market in 1 of them. In the 2026 Annual Election Period (December to February) it gained 1,625 members (+12.6%). For 2027, 0 of its members are in plans that terminate and 2,822 in plans leaving their county.
15KMA members, October 2026
+17.0%change since October 2025 (+2,180)
0.04%national MA share, rank 90
2contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Massachusetts | 14,953 | 2.8% |
| Connecticut | 13 | 0.0% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Hampden County, MA | 7,709 | +1,243 | 15.4% |
| Berkshire County, MA | 3,122 | +197 | 49.2% |
| Hampshire County, MA | 2,516 | +484 | 21.3% |
| Franklin County, MA | 1,606 | +265 | 23.3% |
| Hartford County, CT | 13 | +2 | 0.0% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H8578 Health New England Medicare Advantage Plans | HMO/HMOPOS | 8,631 | 8,751 | 9,978 |
| H2737 Health New England Medicare Advantage Plans | Local PPO | 3,527 | 4,076 | 5,029 |
Star ratings for these contracts are in the MA Quality Dashboard.