Medicare Advantage in St. Croix County, Wisconsin
9,676 people in St. Croix County, Wisconsin were enrolled in Medicare Advantage in October 2026, 47.6% of 20,336 eligible beneficiaries (−4.2 pts since October 2025). Medica Holding Company is the largest parent organization with 60% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,992 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 123 members here are in plans that terminate or leave the county. MA plans offered go from 14 to 14.
Parent organizations in St. Croix County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medica Holding Company | 5,765 | +923 | 59.9% |
| HealthPartners, Inc. | 1,349 | +259 | 14.0% |
| UnitedHealth Group, Inc. | 1,185 | −719 | 12.3% |
| Humana Inc. | 567 | +144 | 5.9% |
| Group Health Cooperative of Eau Claire | 425 | new | 4.4% |
| Elevance Health, Inc. | 180 | −1,333 | 1.9% |
| Aware Integrated, Inc. | 100 | +69 | 1.0% |
| CVS Health Corporation | 57 | −4 | 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, 416 beneficiaries in St. Croix County were assigned to 44 Medicare Shared Savings Program ACOs, 6.2% of assignable Original Medicare beneficiaries. Together, roughly 51% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.