Medicare Advantage in Clayton County, Iowa
1,823 people in Clayton County, Iowa were enrolled in Medicare Advantage in October 2026, 34.9% of 5,222 eligible beneficiaries (−0.8 pts since October 2025). Medical Associates Clinic, P.C. is the largest parent organization with 34% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,208 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 533 members here are in plans that terminate or leave the county, and CVS Health Corporation, Blue Cross Blue Shield of Michigan Mutual Ins. Co. leave. MA plans offered go from 25 to 16.
Parent organizations in Clayton County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Medical Associates Clinic, P.C. | 605 | +3 | 33.9% |
| UnitedHealth Group, Inc. | 405 | −222 | 22.7% |
| CVS Health Corporation | 356 | +136 | 19.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 173 | +36 | 9.7% |
| Humana Inc. | 116 | +28 | 6.5% |
| Centene Corporation | 47 | +25 | 2.6% |
| Trinity Health Corporation | 38 | new | 2.1% |
| Elevance Health, Inc. | 35 | −18 | 2.0% |
| Mitchell Family Office | 12 | new | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,792 beneficiaries in Clayton County were assigned to 21 Medicare Shared Savings Program ACOs, 68.7% of assignable Original Medicare beneficiaries. Together, roughly 80% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.