Medicare Advantage in Dane County, Wisconsin
41,038 people in Dane County, Wisconsin were enrolled in Medicare Advantage in October 2026, 38.3% of 107,098 eligible beneficiaries (−1.0 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 28% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 1,917 (highly concentrated). For 2027, 3,496 members here are in plans that terminate or leave the county, and Sanford Health leaves. MA plans offered go from 40 to 31.
Parent organizations in Dane County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 11,628 | −264 | 28.4% |
| Medica Holding Company | 9,697 | −168 | 23.7% |
| University of Wisconsin Hospitals and Clincs Autho | 6,717 | +99 | 16.4% |
| Humana Inc. | 6,117 | −132 | 15.0% |
| CVS Health Corporation | 2,003 | +570 | 4.9% |
| Centene Corporation | 1,221 | +457 | 3.0% |
| Molina Healthcare, Inc. | 1,140 | +136 | 2.8% |
| Elevance Health, Inc. | 1,124 | −682 | 2.7% |
| Sanford Health | 924 | +112 | 2.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 110 | +5 | 0.3% |
| Highmark Health | 109 | −3 | 0.3% |
| Network Health, Inc. | 71 | +1 | 0.2% |
| Health Care Service Corporation | 42 | +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, 11,119 beneficiaries in Dane County were assigned to 145 Medicare Shared Savings Program ACOs, 24.5% of assignable Original Medicare beneficiaries. Together, roughly 53% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.