Medicare Advantage in Washington County, Wisconsin
22,500 people in Washington County, Wisconsin were enrolled in Medicare Advantage in October 2026, 64.1% of 35,075 eligible beneficiaries (+0.3 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 54% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 3,634 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 716 members here are in plans that terminate or leave the county. MA plans offered go from 34 to 33.
Parent organizations in Washington County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 12,146 | −717 | 54.1% |
| Network Health, Inc. | 4,952 | +1,917 | 22.0% |
| Humana Inc. | 2,975 | +419 | 13.2% |
| CVS Health Corporation | 1,442 | +11 | 6.4% |
| Elevance Health, Inc. | 652 | −522 | 2.9% |
| Centene Corporation | 198 | +104 | 0.9% |
| Molina Healthcare, Inc. | 55 | +16 | 0.2% |
| CareSource | 28 | 0 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 20 | +1 | under 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, 7,807 beneficiaries in Washington County were assigned to 42 Medicare Shared Savings Program ACOs, 81.5% of assignable Original Medicare beneficiaries. Together, roughly 93% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.