Medicare Advantage in Hill County, Montana
260 people in Hill County, Montana were enrolled in Medicare Advantage in October 2026, 7.4% of 3,500 eligible beneficiaries (+0.9 pts since October 2025). Health Care Service Corporation is the largest parent organization with 100% of reported enrollment; 1 parent organizations have 11 or more members and the HHI is 10,000 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 214 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves.
Parent organizations in Hill County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Health Care Service Corporation | 234 | +29 | 100.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 244 beneficiaries in Hill County were assigned to 17 Medicare Shared Savings Program ACOs, 9.9% of assignable Original Medicare beneficiaries. Together, roughly 17% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.