Medicare Advantage in Harrison County, Missouri
601 people in Harrison County, Missouri were enrolled in Medicare Advantage in October 2026, 27.0% of 2,224 eligible beneficiaries (−0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 82% of reported enrollment; 3 parent organizations have 11 or more members and the HHI is 6,998 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 32 members here are in plans that terminate or leave the county. MA plans offered go from 13 to 12.
Parent organizations in Harrison County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 482 | −19 | 82.3% |
| CVS Health Corporation | 88 | +1 | 15.0% |
| Humana Inc. | 16 | new | 2.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 70 beneficiaries in Harrison County were assigned to 13 Medicare Shared Savings Program ACOs, 5.1% of assignable Original Medicare beneficiaries. Together, roughly 31% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.