Medicare Advantage in Mahaska County, Iowa
1,890 people in Mahaska County, Iowa were enrolled in Medicare Advantage in October 2026, 37.1% of 5,092 eligible beneficiaries (−2.2 pts since October 2025). Humana Inc. is the largest parent organization with 24% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 1,867 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 375 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 16 to 17.
Parent organizations in Mahaska County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 454 | +225 | 24.3% |
| CVS Health Corporation | 414 | −220 | 22.2% |
| Centene Corporation | 335 | +273 | 17.9% |
| UnitedHealth Group, Inc. | 285 | −419 | 15.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 275 | +36 | 14.7% |
| Trinity Health Corporation | 54 | +42 | 2.9% |
| Mitchell Family Office | 26 | +2 | 1.4% |
| Elevance Health, Inc. | 24 | −12 | 1.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,341 beneficiaries in Mahaska County were assigned to 26 Medicare Shared Savings Program ACOs, 57.8% of assignable Original Medicare beneficiaries. Together, roughly 73% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.