Medicare Advantage in Custer County, Idaho
230 people in Custer County, Idaho were enrolled in Medicare Advantage in October 2026, 14.9% of 1,546 eligible beneficiaries (+1.4 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 93% of reported enrollment; 2 parent organizations have 11 or more members and the HHI is 8,713 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 3 to 3.
Parent organizations in Custer County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 202 | +5 | 93.1% |
| Molina Healthcare, Inc. | 15 | new | 6.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 768 beneficiaries in Custer County were assigned to 13 Medicare Shared Savings Program ACOs, 70.0% 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.