Medicare Advantage in Sullivan County, Missouri
453 people in Sullivan County, Missouri were enrolled in Medicare Advantage in October 2026, 30.0% of 1,512 eligible beneficiaries (−0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 83% of reported enrollment; 3 parent organizations have 11 or more members and the HHI is 7,032 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 18 to 24.
Parent organizations in Sullivan County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 351 | +46 | 82.8% |
| Humana Inc. | 53 | +6 | 12.5% |
| CVS Health Corporation | 20 | new | 4.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 293 beneficiaries in Sullivan County were assigned to 17 Medicare Shared Savings Program ACOs, 34.0% of assignable Original Medicare beneficiaries. Together, roughly 54% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.