Medicare Advantage in Marion County, Ohio
9,008 people in Marion County, Ohio were enrolled in Medicare Advantage in October 2026, 59.2% of 15,223 eligible beneficiaries (+0.8 pts since October 2025). CVS Health Corporation is the largest parent organization with 27% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,067 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,451 members here are in plans that terminate or leave the county. MA plans offered go from 41 to 38.
Parent organizations in Marion County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 2,423 | +267 | 27.0% |
| Humana Inc. | 2,179 | +573 | 24.3% |
| Devoted Health, Inc. | 1,630 | +1,028 | 18.2% |
| UnitedHealth Group, Inc. | 1,591 | −127 | 17.7% |
| Elevance Health, Inc. | 911 | −491 | 10.1% |
| CareSource | 142 | +97 | 1.6% |
| Centene Corporation | 46 | −37 | 0.5% |
| Molina Healthcare, Inc. | 44 | new | 0.5% |
| Highmark Health | 13 | new | 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, 3,225 beneficiaries in Marion County were assigned to 27 Medicare Shared Savings Program ACOs, 64.9% of assignable Original Medicare beneficiaries. Together, roughly 86% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.