Medicare Advantage in Fremont County, Idaho
887 people in Fremont County, Idaho were enrolled in Medicare Advantage in October 2026, 29.4% of 3,014 eligible beneficiaries (−9.1 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 52% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 3,749 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 21 members here are in plans that terminate or leave the county. MA plans offered go from 10 to 10.
Parent organizations in Fremont County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 455 | +190 | 52.5% |
| Gemstone Holdings, Inc. | 255 | −468 | 29.4% |
| Molina Healthcare, Inc. | 82 | −1 | 9.5% |
| Humana Inc. | 44 | +14 | 5.1% |
| Fenyx Health Holdings, Inc. | 16 | new | 1.8% |
| CVS Health Corporation | 14 | −2 | 1.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 829 beneficiaries in Fremont County were assigned to 21 Medicare Shared Savings Program ACOs, 63.1% of assignable Original Medicare beneficiaries. Together, roughly 74% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.