Medicare Advantage in Hampden County, Massachusetts
50,260 people in Hampden County, Massachusetts were enrolled in Medicare Advantage in October 2026, 45.3% of 111,031 eligible beneficiaries (−0.5 pts since October 2025). CareSource is the largest parent organization with 27% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 1,671 (moderately concentrated). HRSA classifies the county as partly rural. For 2027, 1,119 members here are in plans that terminate or leave the county. MA plans offered go from 35 to 37.
Parent organizations in Hampden County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CareSource | 13,479 | −80 | 27.0% |
| Blue Cross and Blue Shield of Massachusetts, Inc. | 8,576 | −934 | 17.2% |
| Baystate Health, Inc. | 7,709 | +1,243 | 15.4% |
| UnitedHealth Group, Inc. | 7,591 | −373 | 15.2% |
| CVS Health Corporation | 5,463 | +600 | 10.9% |
| Point32Health, Inc. | 3,031 | −539 | 6.1% |
| Fallon Community Health Plan, Inc. | 1,792 | −100 | 3.6% |
| Humana Inc. | 1,571 | +383 | 3.1% |
| Serenity Care, Inc. | 419 | −1 | 0.8% |
| Trinity Health Corporation | 162 | −13 | 0.3% |
| Elevance Health, Inc. | 122 | +1 | 0.2% |
| Molina Healthcare, Inc. | 35 | +7 | under 0.1% |
| MHH Healthcare, L.P. | 11 | new | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 28,145 beneficiaries in Hampden County were assigned to 111 Medicare Shared Savings Program ACOs, 65.8% of assignable Original Medicare beneficiaries. Together, roughly 81% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.