Medicare Advantage in Blaine County, Idaho
1,307 people in Blaine County, Idaho were enrolled in Medicare Advantage in October 2026, 20.4% of 6,402 eligible beneficiaries (−7.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 89% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 7,892 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,042 members here are in plans that terminate or leave the county, and Humana Inc. leaves. MA plans offered go from 7 to 1.
Parent organizations in Blaine County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,114 | +312 | 88.6% |
| Molina Healthcare, Inc. | 48 | −1 | 3.8% |
| CVS Health Corporation | 43 | +4 | 3.4% |
| Humana Inc. | 41 | −25 | 3.3% |
| Elevance Health, Inc. | 11 | −2 | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 142 beneficiaries in Blaine County were assigned to 55 Medicare Shared Savings Program ACOs, 4.7% of assignable Original Medicare beneficiaries. Together, roughly 24% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.