Medicare Advantage in Sioux County, Nebraska
56 people in Sioux County, Nebraska were enrolled in Medicare Advantage in October 2026, 19.2% of 292 eligible beneficiaries (+6.5 pts since October 2025). Medica Holding Company is the largest parent organization with 58% of reported enrollment; 2 parent organizations have 11 or more members and the HHI is 5,128 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 12 members here are in plans that terminate or leave the county, and Humana Inc. leaves. MA plans offered go from 7 to 4.
Parent organizations in Sioux County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 29 | +8 | 58.0% |
| Humana Inc. | 21 | +10 | 42.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 4 beneficiaries in Sioux County were assigned to 2 Medicare Shared Savings Program ACOs, 2.8% of assignable Original Medicare beneficiaries. Together, roughly 21% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.