Medicare Advantage in Buchanan County, Iowa
2,017 people in Buchanan County, Iowa were enrolled in Medicare Advantage in October 2026, 40.3% of 5,009 eligible beneficiaries (−0.8 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 33% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,429 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 298 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 19 to 21.
Parent organizations in Buchanan County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 657 | −295 | 32.8% |
| CVS Health Corporation | 583 | +189 | 29.1% |
| Humana Inc. | 324 | +76 | 16.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 300 | −2 | 15.0% |
| Centene Corporation | 58 | +24 | 2.9% |
| Trinity Health Corporation | 52 | +31 | 2.6% |
| Elevance Health, Inc. | 28 | −16 | 1.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,727 beneficiaries in Buchanan County were assigned to 15 Medicare Shared Savings Program ACOs, 75.6% of assignable Original Medicare beneficiaries. Together, roughly 85% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.