Medicare Advantage in Custer County, Nebraska
603 people in Custer County, Nebraska were enrolled in Medicare Advantage in October 2026, 21.5% of 2,811 eligible beneficiaries (−0.8 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 41% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,024 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 342 members here are in plans that terminate or leave the county. MA plans offered go from 17 to 19.
Parent organizations in Custer County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 241 | −21 | 41.3% |
| Blue Cross Blue Shield of Nebraska | 173 | +61 | 29.6% |
| Medica Holding Company | 117 | −21 | 20.0% |
| Centene Corporation | 31 | new | 5.3% |
| Sanford Health | 22 | +7 | 3.8% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,441 beneficiaries in Custer County were assigned to 16 Medicare Shared Savings Program ACOs, 84.0% of assignable Original Medicare beneficiaries. Together, roughly 87% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.