Medicare Advantage in Trempealeau County, Wisconsin
3,582 people in Trempealeau County, Wisconsin were enrolled in Medicare Advantage in October 2026, 49.5% of 7,234 eligible beneficiaries (−3.0 pts since October 2025). University of Wisconsin Hospitals and Clincs Autho is the largest parent organization with 40% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,560 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 481 members here are in plans that terminate or leave the county. MA plans offered go from 25 to 22.
Parent organizations in Trempealeau County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| University of Wisconsin Hospitals and Clincs Autho | 1,424 | +47 | 40.1% |
| Sanford Health | 931 | +279 | 26.2% |
| UnitedHealth Group, Inc. | 336 | −261 | 9.5% |
| CVS Health Corporation | 295 | +250 | 8.3% |
| Humana Inc. | 266 | −54 | 7.5% |
| Elevance Health, Inc. | 260 | −409 | 7.3% |
| Group Health Cooperative of Eau Claire | 21 | new | 0.6% |
| Network Health, Inc. | 21 | new | 0.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,077 beneficiaries in Trempealeau County were assigned to 17 Medicare Shared Savings Program ACOs, 81.1% of assignable Original Medicare beneficiaries. Together, roughly 90% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.