Medicare Advantage in Green Lake County, Wisconsin
3,873 people in Green Lake County, Wisconsin were enrolled in Medicare Advantage in October 2026, 67.2% of 5,765 eligible beneficiaries (+1.3 pts since October 2025). Network Health, Inc. is the largest parent organization with 56% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,846 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 769 members here are in plans that terminate or leave the county, and Centene Corporation, Sanford Health leave. MA plans offered go from 30 to 18.
Parent organizations in Green Lake County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Network Health, Inc. | 2,134 | +341 | 55.6% |
| UnitedHealth Group, Inc. | 938 | −164 | 24.5% |
| Humana Inc. | 428 | +176 | 11.2% |
| Elevance Health, Inc. | 177 | −156 | 4.6% |
| Centene Corporation | 56 | 0 | 1.5% |
| CVS Health Corporation | 55 | +4 | 1.4% |
| Sanford Health | 32 | +14 | 0.8% |
| Molina Healthcare, Inc. | 15 | +4 | 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, 988 beneficiaries in Green Lake County were assigned to 26 Medicare Shared Savings Program ACOs, 70.2% 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.