Medicare Advantage in Mercer County, Missouri
281 people in Mercer County, Missouri were enrolled in Medicare Advantage in October 2026, 29.4% of 955 eligible beneficiaries (+1.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 95% of reported enrollment; 2 parent organizations have 11 or more members and the HHI is 9,089 (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 17 to 19.
Parent organizations in Mercer County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 219 | +10 | 95.2% |
| CVS Health Corporation | 11 | −6 | 4.8% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 98 beneficiaries in Mercer County were assigned to 11 Medicare Shared Savings Program ACOs, 18.3% of assignable Original Medicare beneficiaries. Together, roughly 42% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.