Medicare Advantage in Power County, Idaho
514 people in Power County, Idaho were enrolled in Medicare Advantage in October 2026, 32.1% of 1,602 eligible beneficiaries (−8.9 pts since October 2025). Gemstone Holdings, Inc. is the largest parent organization with 41% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,096 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 16 members here are in plans that terminate or leave the county. MA plans offered go from 10 to 10.
Parent organizations in Power County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Gemstone Holdings, Inc. | 208 | −248 | 41.3% |
| UnitedHealth Group, Inc. | 168 | +142 | 33.3% |
| Molina Healthcare, Inc. | 70 | −21 | 13.9% |
| Humana Inc. | 46 | −12 | 9.1% |
| Fenyx Health Holdings, Inc. | 12 | new | 2.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 385 beneficiaries in Power County were assigned to 9 Medicare Shared Savings Program ACOs, 59.8% of assignable Original Medicare beneficiaries. Together, roughly 73% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.