Medicare Advantage in Polk County, Wisconsin
6,759 people in Polk County, Wisconsin were enrolled in Medicare Advantage in October 2026, 51.5% of 13,130 eligible beneficiaries (−2.4 pts since October 2025). Medica Holding Company is the largest parent organization with 55% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 3,469 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 492 members here are in plans that terminate or leave the county. MA plans offered go from 24 to 21.
Parent organizations in Polk County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 3,724 | +536 | 55.4% |
| UnitedHealth Group, Inc. | 732 | −318 | 10.9% |
| Humana Inc. | 711 | +367 | 10.6% |
| Sanford Health | 641 | +165 | 9.5% |
| HealthPartners, Inc. | 570 | +128 | 8.5% |
| Elevance Health, Inc. | 223 | −1,064 | 3.3% |
| Group Health Cooperative of Eau Claire | 63 | new | 0.9% |
| Aware Integrated, Inc. | 34 | new | 0.5% |
| CVS Health Corporation | 30 | +2 | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 140 beneficiaries in Polk County were assigned to 24 Medicare Shared Savings Program ACOs, 3.1% of assignable Original Medicare beneficiaries. Together, roughly 53% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.