Medicare Advantage in Story County, Iowa
4,402 people in Story County, Iowa were enrolled in Medicare Advantage in October 2026, 27.2% of 16,205 eligible beneficiaries (−1.0 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 46% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 3,021 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 2,506 members here are in plans that terminate or leave the county, and Blue Cross Blue Shield of Michigan Mutual Ins. Co., CVS Health Corporation leave. MA plans offered go from 18 to 7.
Parent organizations in Story County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,009 | +46 | 46.2% |
| Humana Inc. | 806 | +315 | 18.5% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 720 | +155 | 16.6% |
| CVS Health Corporation | 711 | −585 | 16.3% |
| Mitchell Family Office | 47 | +16 | 1.1% |
| Elevance Health, Inc. | 45 | −21 | 1.0% |
| Immanuel | 11 | new | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 7,292 beneficiaries in Story County were assigned to 39 Medicare Shared Savings Program ACOs, 78.8% 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.