Medicare Advantage in Decatur County, Iowa
656 people in Decatur County, Iowa were enrolled in Medicare Advantage in October 2026, 35.0% of 1,875 eligible beneficiaries (−0.9 pts since October 2025). CVS Health Corporation is the largest parent organization with 31% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 1,983 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 104 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 15 to 16.
Parent organizations in Decatur County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 197 | −131 | 31.0% |
| Centene Corporation | 127 | new | 20.0% |
| Humana Inc. | 109 | +18 | 17.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 91 | +40 | 14.3% |
| Elevance Health, Inc. | 54 | −22 | 8.5% |
| Trinity Health Corporation | 45 | new | 7.1% |
| Mitchell Family Office | 13 | 0 | 2.0% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 819 beneficiaries in Decatur County were assigned to 14 Medicare Shared Savings Program ACOs, 81.5% of assignable Original Medicare beneficiaries. Together, roughly 88% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.