Medicare Advantage in Hillsborough County, New Hampshire
33,098 people in Hillsborough County, New Hampshire were enrolled in Medicare Advantage in October 2026, 34.8% of 95,194 eligible beneficiaries (−1.9 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 38% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,642 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 9,488 members here are in plans that terminate or leave the county, and CVS Health Corporation, BMC Health System, Inc., CareSource leave. MA plans offered go from 17 to 15.
Parent organizations in Hillsborough County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 12,369 | +380 | 37.5% |
| Humana Inc. | 9,279 | +6,105 | 28.2% |
| CVS Health Corporation | 5,460 | −706 | 16.6% |
| Elevance Health, Inc. | 3,732 | −4,070 | 11.3% |
| BMC Health System, Inc. | 2,034 | +172 | 6.2% |
| Blue Cross and Blue Shield of Massachusetts, Inc. | 36 | +10 | 0.1% |
| Health Care Service Corporation | 19 | new | under 0.1% |
| CareSource | 17 | new | under 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 12 | −24 | 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, 26,758 beneficiaries in Hillsborough County were assigned to 136 Medicare Shared Savings Program ACOs, 67.4% of assignable Original Medicare beneficiaries. Together, roughly 79% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.