Medicare Advantage in Franklin County, Massachusetts
6,934 people in Franklin County, Massachusetts were enrolled in Medicare Advantage in October 2026, 32.3% of 21,464 eligible beneficiaries (−0.8 pts since October 2025). Blue Cross and Blue Shield of Massachusetts, Inc. is the largest parent organization with 40% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,587 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 21 members here are in plans that terminate or leave the county. MA plans offered go from 21 to 22.
Parent organizations in Franklin County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Blue Cross and Blue Shield of Massachusetts, Inc. | 2,733 | −185 | 39.7% |
| Baystate Health, Inc. | 1,606 | +265 | 23.3% |
| UnitedHealth Group, Inc. | 1,228 | −91 | 17.9% |
| CareSource | 753 | −15 | 10.9% |
| Fallon Community Health Plan, Inc. | 298 | −24 | 4.3% |
| CVS Health Corporation | 164 | +1 | 2.4% |
| Serenity Care, Inc. | 41 | +2 | 0.6% |
| Elevance Health, Inc. | 29 | +2 | 0.4% |
| Health Care Service Corporation | 16 | new | 0.2% |
| Humana Inc. | 11 | −4 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 6,096 beneficiaries in Franklin County were assigned to 57 Medicare Shared Savings Program ACOs, 60.6% of assignable Original Medicare beneficiaries. Together, roughly 73% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.