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Top MA Enrollment Contracts in Massachusetts (Jul 2026)
This page summarizes county-level Medicare Advantage enrollment by contract in Massachusetts.
Home / Data Tools / MA Enrollment / MA State Rankings / Massachusetts
Data source: SCC Enrollment MA Alternative File (2026-07). State total enrollment shown: 540,668.
Top 10 Contracts
| Rank | Contract ID | Organization Name | Plan Type | Enrolled | Counties | State Share |
|---|---|---|---|---|---|---|
| 1 | H2256 | TUFTS ASSOCIATED HEALTH MAINTENANCE ORGANIZATION | HMO/HMOPOS | 100,390 | 10 | 18.6% |
| 2 | H2230 | BCBS OF MASSACHUSETTS HMO BLUE, INC. | Local PPO | 44,558 | 12 | 8.2% |
| 3 | H5521 | AETNA LIFE INSURANCE COMPANY | Local PPO | 41,980 | 10 | 7.8% |
| 4 | H5253 | UNITEDHEALTHCARE OF WISCONSIN, INC. | HMO/HMOPOS | 41,884 | 10 | 7.7% |
| 5 | H2261 | BCBS OF MASSACHUSETTS HMO BLUE, INC. | HMO/HMOPOS | 41,804 | 11 | 7.7% |
| 6 | H1486 | COMMONWEALTH CARE ALLIANCE, INC. | HMO/HMOPOS | 26,215 | 12 | 4.8% |
| 7 | H2226 | UnitedHealthcare of New England, Inc. | HMO/HMOPOS | 24,376 | 9 | 4.5% |
| 8 | H8768 | CARE IMPROVEMENT PLUS SOUTH CENTRAL INSURANCE CO. | Local PPO | 23,424 | 10 | 4.3% |
| 9 | H2225 | COMMONWEALTH CARE ALLIANCE, INC. | HMO/HMOPOS | 18,759 | 10 | 3.5% |
| 10 | H9485 | Mass General Brigham Health Plan, Inc. | Local PPO | 17,824 | 10 | 3.3% |
Method note: Enrollment is based on legal state/county of residence for payment purposes and may include out-of-service-area beneficiaries.
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