Medicare Advantage in Green County, Wisconsin
3,385 people in Green County, Wisconsin were enrolled in Medicare Advantage in October 2026, 35.1% of 9,644 eligible beneficiaries (−0.4 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 41% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,542 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 460 members here are in plans that terminate or leave the county. MA plans offered go from 32 to 28.
Parent organizations in Green County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,381 | −49 | 41.2% |
| CVS Health Corporation | 593 | +162 | 17.7% |
| Humana Inc. | 580 | +80 | 17.3% |
| Medica Holding Company | 487 | +48 | 14.5% |
| Elevance Health, Inc. | 121 | −219 | 3.6% |
| University of Wisconsin Hospitals and Clincs Autho | 101 | −6 | 3.0% |
| Highmark Health | 38 | +1 | 1.1% |
| Molina Healthcare, Inc. | 30 | +5 | 0.9% |
| Network Health, Inc. | 23 | +11 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,836 beneficiaries in Green County were assigned to 29 Medicare Shared Savings Program ACOs, 63.3% 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.