Medicare Advantage in Marshall County, Iowa
3,779 people in Marshall County, Iowa were enrolled in Medicare Advantage in October 2026, 41.7% of 9,054 eligible beneficiaries (+0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 38% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,686 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,157 members here are in plans that terminate or leave the county, and Blue Cross Blue Shield of Michigan Mutual Ins. Co., Molina Healthcare, Inc. leave. MA plans offered go from 23 to 24.
Parent organizations in Marshall County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,412 | −155 | 37.7% |
| CVS Health Corporation | 1,006 | −177 | 26.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 652 | +153 | 17.4% |
| Humana Inc. | 573 | +224 | 15.3% |
| Mitchell Family Office | 57 | +3 | 1.5% |
| Elevance Health, Inc. | 29 | −17 | 0.8% |
| Molina Healthcare, Inc. | 14 | new | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,401 beneficiaries in Marshall County were assigned to 30 Medicare Shared Savings Program ACOs, 61.0% of assignable Original Medicare beneficiaries. Together, roughly 77% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.