MA Enrollment Explorer / Parent organizations / University of Wisconsin Hospitals and Clincs Autho
University of Wisconsin Hospitals and Clincs Autho: Medicare Advantage enrollment and market share
University of Wisconsin Hospitals and Clincs Autho had 21,418 Medicare Advantage members in October 2026, #83 nationally with 0.06% of all MA enrollment. It lost 15,030 members (−41.2%) since October 2025, and has enrollment in 3 states and 13 counties with 11 or more members, leading the market in 4 of them. In the 2026 Annual Election Period (December to February) it lost 14,813 members (−40.8%). For 2027, none of its members are in plans that terminate or leave their county.
21KMA members, October 2026
−41.2%change since October 2025 (−15,030)
0.06%national MA share, rank 83
2contracts with enrollment
Largest states
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| La Crosse County, WI | 7,804 | −140 | 57.1% |
| Dane County, WI | 6,717 | +99 | 16.4% |
| Monroe County, WI | 1,752 | −89 | 41.8% |
| Houston County, MN | 1,514 | +191 | 53.3% |
| Trempealeau County, WI | 1,424 | +47 | 40.1% |
| Fillmore County, MN | 588 | +74 | 21.4% |
| Columbia County, WI | 581 | −55 | 9.1% |
| Wabasha County, MN | 337 | +253 | 11.1% |
| Buffalo County, WI | 291 | +24 | 20.4% |
| Allamakee County, IA | 171 | −9 | 19.6% |
| Green County, WI | 101 | −6 | 3.0% |
| Winneshiek County, IA | 66 | +13 | 8.4% |
| Fayette County, IA | 21 | −2 | 1.2% |
| Ogle County, IL | 0 | −27 | 0.0% |
| Adams County, WI | 0 | −120 | 0.0% |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H5262 Quartz Medicare Advantage (HMO) | HMO/HMOPOS | 32,538 | 32,766 | 18,970 |
| H9834 Quartz Medicare Advantage (HMO) | HMO/HMOPOS | 3,873 | 3,682 | 2,448 |
Star ratings for these contracts are in the MA Quality Dashboard.