Medicare Advantage in Glacier County, Montana
491 people in Glacier County, Montana were enrolled in Medicare Advantage in October 2026, 21.1% of 2,322 eligible beneficiaries (+1.9 pts since October 2025). Humana Inc. is the largest parent organization with 62% of reported enrollment; 3 parent organizations have 11 or more members and the HHI is 4,997 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 100 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 15 to 5.
Parent organizations in Glacier County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 301 | +85 | 62.4% |
| UnitedHealth Group, Inc. | 158 | −34 | 32.8% |
| Health Care Service Corporation | 23 | +9 | 4.8% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 338 beneficiaries in Glacier County were assigned to 15 Medicare Shared Savings Program ACOs, 35.7% of assignable Original Medicare beneficiaries. Together, roughly 49% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.