Medicare Advantage in Greene County, Missouri
40,512 people in Greene County, Missouri were enrolled in Medicare Advantage in October 2026, 61.8% of 65,507 eligible beneficiaries (+0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 27% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 1,964 (highly concentrated). For 2027, 50 members here are in plans that terminate or leave the county. MA plans offered go from 38 to 38.
Parent organizations in Greene County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 10,758 | −1,414 | 26.6% |
| Humana Inc. | 9,957 | +2,001 | 24.6% |
| CVS Health Corporation | 8,311 | −979 | 20.6% |
| Devoted Health, Inc. | 4,105 | +3,585 | 10.2% |
| Elevance Health, Inc. | 3,952 | −2,454 | 9.8% |
| CoxHealth | 1,989 | +127 | 4.9% |
| Centene Corporation | 476 | −17 | 1.2% |
| Lumeris Group Holdings Corporation | 424 | −21 | 1.0% |
| Rifkin Managed Care Holding, LLC | 280 | −11 | 0.7% |
| Advocates for a Healthy Community, Inc. | 56 | +17 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 48 | −5 | 0.1% |
| Mitchell Family Office | 34 | new | under 0.1% |
| Missouri Healthcare Advisors, LLC | 22 | 0 | under 0.1% |
| Health Care Service Corporation | 11 | new | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 8,636 beneficiaries in Greene County were assigned to 102 Medicare Shared Savings Program ACOs, 45.5% of assignable Original Medicare beneficiaries. Together, roughly 79% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.