Medicare Advantage in Mercer County, Ohio
3,215 people in Mercer County, Ohio were enrolled in Medicare Advantage in October 2026, 32.2% of 9,997 eligible beneficiaries (−0.00 pts since October 2025). CVS Health Corporation is the largest parent organization with 45% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,780 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 797 members here are in plans that terminate or leave the county. MA plans offered go from 47 to 36.
Parent organizations in Mercer County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 1,448 | +138 | 45.3% |
| Humana Inc. | 641 | +27 | 20.1% |
| UnitedHealth Group, Inc. | 500 | +70 | 15.6% |
| Elevance Health, Inc. | 207 | −91 | 6.5% |
| Highmark Health | 162 | −2 | 5.1% |
| CareSource | 62 | +26 | 1.9% |
| The Schroer Group, Inc. | 61 | +21 | 1.9% |
| Devoted Health, Inc. | 56 | −12 | 1.8% |
| Centene Corporation | 47 | −9 | 1.5% |
| Molina Healthcare, Inc. | 12 | new | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 224 beneficiaries in Mercer County were assigned to 22 Medicare Shared Savings Program ACOs, 4.3% of assignable Original Medicare beneficiaries. Together, roughly 35% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.