Medicare Advantage in Butler County, Iowa
1,297 people in Butler County, Iowa were enrolled in Medicare Advantage in October 2026, 32.9% of 3,945 eligible beneficiaries (−0.02 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 36% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,406 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 496 members here are in plans that terminate or leave the county, and Blue Cross Blue Shield of Michigan Mutual Ins. Co. leaves. MA plans offered go from 23 to 18.
Parent organizations in Butler County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 452 | −290 | 35.5% |
| CVS Health Corporation | 342 | +146 | 26.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 188 | +27 | 14.8% |
| Humana Inc. | 146 | +46 | 11.5% |
| Trinity Health Corporation | 101 | +59 | 7.9% |
| Centene Corporation | 31 | new | 2.4% |
| Mitchell Family Office | 12 | +1 | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 814 beneficiaries in Butler County were assigned to 20 Medicare Shared Savings Program ACOs, 37.0% of assignable Original Medicare beneficiaries. Together, roughly 58% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.