Medicare Advantage in Maries County, Missouri
1,105 people in Maries County, Missouri were enrolled in Medicare Advantage in October 2026, 47.0% of 2,349 eligible beneficiaries (+1.5 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 56% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 3,879 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 339 members here are in plans that terminate or leave the county. MA plans offered go from 25 to 23.
Parent organizations in Maries County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 597 | −23 | 56.1% |
| Humana Inc. | 254 | +154 | 23.9% |
| CVS Health Corporation | 127 | +29 | 11.9% |
| Centene Corporation | 31 | +19 | 2.9% |
| Rifkin Managed Care Holding, LLC | 27 | +1 | 2.5% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 15 | +1 | 1.4% |
| Elevance Health, Inc. | 13 | −129 | 1.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 460 beneficiaries in Maries County were assigned to 12 Medicare Shared Savings Program ACOs, 52.3% of assignable Original Medicare beneficiaries. Together, roughly 75% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.