Medicare Advantage in Eau Claire County, Wisconsin
11,159 people in Eau Claire County, Wisconsin were enrolled in Medicare Advantage in October 2026, 47.4% of 23,519 eligible beneficiaries (−2.1 pts since October 2025). Sanford Health is the largest parent organization with 47% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,968 (highly concentrated). For 2027, 5,021 members here are in plans that terminate or leave the county, and Medica Holding Company, UnitedHealth Group, Inc. leave. MA plans offered go from 22 to 13.
Parent organizations in Eau Claire County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Sanford Health | 5,197 | +654 | 46.7% |
| Medica Holding Company | 2,356 | +551 | 21.2% |
| UnitedHealth Group, Inc. | 1,535 | −615 | 13.8% |
| Elevance Health, Inc. | 973 | −631 | 8.8% |
| Humana Inc. | 899 | −171 | 8.1% |
| Group Health Cooperative of Eau Claire | 78 | +41 | 0.7% |
| CVS Health Corporation | 64 | −2 | 0.6% |
| Network Health, Inc. | 15 | +4 | 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 4,911 beneficiaries in Eau Claire County were assigned to 41 Medicare Shared Savings Program ACOs, 53.6% of assignable Original Medicare beneficiaries. Together, roughly 76% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.