Medicare Advantage in Rock County, Nebraska
81 people in Rock County, Nebraska were enrolled in Medicare Advantage in October 2026, 18.6% of 436 eligible beneficiaries (−1.2 pts since October 2025). Medica Holding Company is the largest parent organization with 100% of reported enrollment; 1 parent organizations have 11 or more members and the HHI is 10,000 (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 9 to 4.
Parent organizations in Rock County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 64 | −3 | 100.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 25 beneficiaries in Rock County were assigned to 6 Medicare Shared Savings Program ACOs, 8.3% of assignable Original Medicare beneficiaries. Together, roughly 25% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.