MA Enrollment Explorer / Parent organizations / Blue Cross and Blue Shield of Massachusetts, Inc.
Blue Cross and Blue Shield of Massachusetts, Inc.: Medicare Advantage enrollment and market share
Blue Cross and Blue Shield of Massachusetts, Inc. had 87,476 Medicare Advantage members in October 2026, #35 nationally with 0.24% of all MA enrollment. It lost 11,420 members (−11.5%) since October 2025, and has enrollment in 6 states and 23 counties with 11 or more members, leading the market in 3 of them. In the 2026 Annual Election Period (December to February) it lost 13,763 members (−13.9%). For 2027, 0 of its members are in plans that terminate and 20,330 in plans leaving their county.
87KMA members, October 2026
−11.5%change since October 2025 (−11,420)
0.24%national MA share, rank 35
2contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Massachusetts | 86,884 | 16.1% |
| New Hampshire | 115 | 0.1% |
| Florida | 48 | 0.0% |
| Maine | 30 | 0.0% |
| Connecticut | 14 | 0.0% |
| South Carolina | 13 | 0.0% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Middlesex County, MA | 15,399 | −1,877 | 14.6% |
| Worcester County, MA | 14,892 | −2,032 | 18.5% |
| Hampden County, MA | 8,576 | −934 | 17.2% |
| Norfolk County, MA | 8,465 | −668 | 17.2% |
| Barnstable County, MA | 8,378 | −59 | 39.5% |
| Plymouth County, MA | 7,776 | −1,299 | 18.4% |
| Bristol County, MA | 6,689 | −943 | 12.6% |
| Essex County, MA | 6,464 | −2,977 | 10.0% |
| Hampshire County, MA | 4,292 | −112 | 36.3% |
| Suffolk County, MA | 3,202 | −429 | 6.6% |
| Franklin County, MA | 2,733 | −185 | 39.7% |
| Rockingham County, NH | 43 | +14 | 0.2% |
| Hillsborough County, NH | 36 | +10 | 0.1% |
| Collier County, FL | 23 | +5 | 0.0% |
| Carroll County, NH | 21 | new | 0.9% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H2230 Blue Cross Blue Shield of Massachusetts | Local PPO | 75,866 | 84,363 | 45,093 |
| H2261 Blue Cross Blue Shield of Massachusetts | HMO/HMOPOS | 12,905 | 14,533 | 42,383 |
Star ratings for these contracts are in the MA Quality Dashboard.