Medicare Advantage in Grafton County, New Hampshire
5,560 people in Grafton County, New Hampshire were enrolled in Medicare Advantage in October 2026, 21.7% of 25,594 eligible beneficiaries (−11.4 pts since October 2025). Humana Inc. is the largest parent organization with 57% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,755 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 498 members here are in plans that terminate or leave the county, and BMC Health System, Inc. leaves. MA plans offered go from 2 to 5.
Parent organizations in Grafton County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 3,123 | +2,921 | 56.7% |
| Elevance Health, Inc. | 1,066 | −1,016 | 19.4% |
| BMC Health System, Inc. | 498 | −1,107 | 9.0% |
| UnitedHealth Group, Inc. | 381 | −2,691 | 6.9% |
| CVS Health Corporation | 286 | −183 | 5.2% |
| Health Care Service Corporation | 123 | new | 2.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 17 | −125 | 0.3% |
| Highmark Health | 11 | 0 | 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, 5,939 beneficiaries in Grafton County were assigned to 108 Medicare Shared Savings Program ACOs, 48.4% of assignable Original Medicare beneficiaries. Together, roughly 60% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.