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Top MA Enrollment Contracts in Massachusetts (Feb 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 (2026-02). State total enrollment shown: 537,941.

Top 10 Contracts

Rank Contract ID Organization Name Plan Type Enrolled Counties State Share
1H2256TUFTS ASSOCIATED HEALTH MAINTENANCE ORGANIZATIONHMO/HMOPOS101,7941018.9%
2H2230BCBS OF MASSACHUSETTS HMO BLUE, INC.Local PPO44,473128.3%
3H5521AETNA LIFE INSURANCE COMPANYLocal PPO41,69497.8%
4H5253UNITEDHEALTHCARE OF WISCONSIN, INC.HMO/HMOPOS40,832117.6%
5H2261BCBS OF MASSACHUSETTS HMO BLUE, INC.HMO/HMOPOS40,389117.5%
6H1486COMMONWEALTH CARE ALLIANCE, INC.HMO/HMOPOS27,182125.1%
7H8768CARE IMPROVEMENT PLUS SOUTH CENTRAL INSURANCE CO.Local PPO25,526104.7%
8H2226UnitedHealthcare of New England, Inc.HMO/HMOPOS24,68894.6%
9H2001SIERRA HEALTH AND LIFE INSURANCE COMPANY, INC.Local PPO17,947143.3%
10H5522AETNA LIFE INSURANCE COMPANYLocal PPO17,879143.3%

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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