Medicare Advantage in Chouteau County, Montana
397 people in Chouteau County, Montana were enrolled in Medicare Advantage in October 2026, 27.6% of 1,437 eligible beneficiaries (+0.6 pts since October 2025). Humana Inc. is the largest parent organization with 87% of reported enrollment; 2 parent organizations have 11 or more members and the HHI is 7,686 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 217 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 14 to 7.
Parent organizations in Chouteau County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 331 | +13 | 86.6% |
| Health Care Service Corporation | 51 | +11 | 13.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 100 beneficiaries in Chouteau County were assigned to 12 Medicare Shared Savings Program ACOs, 13.4% of assignable Original Medicare beneficiaries. Together, roughly 37% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.