Medicare Advantage in Marion County, Missouri
2,457 people in Marion County, Missouri were enrolled in Medicare Advantage in October 2026, 34.8% of 7,060 eligible beneficiaries (−0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 84% of reported enrollment; 4 parent organizations have 11 or more members and the HHI is 7,196 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 677 members here are in plans that terminate or leave the county. MA plans offered go from 17 to 16.
Parent organizations in Marion County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,049 | −66 | 84.1% |
| CVS Health Corporation | 205 | +84 | 8.4% |
| Humana Inc. | 160 | +85 | 6.6% |
| Elevance Health, Inc. | 21 | −74 | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,491 beneficiaries in Marion County were assigned to 25 Medicare Shared Savings Program ACOs, 90.7% of assignable Original Medicare beneficiaries. Together, roughly 94% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.