Medicare Advantage in Seneca County, Ohio
5,765 people in Seneca County, Ohio were enrolled in Medicare Advantage in October 2026, 42.6% of 13,544 eligible beneficiaries (+0.5 pts since October 2025). CVS Health Corporation is the largest parent organization with 44% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,626 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 866 members here are in plans that terminate or leave the county, and Trinity Health Corporation leaves. MA plans offered go from 59 to 50.
Parent organizations in Seneca County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 2,479 | +497 | 43.5% |
| UnitedHealth Group, Inc. | 1,021 | +21 | 17.9% |
| Elevance Health, Inc. | 720 | −361 | 12.6% |
| Devoted Health, Inc. | 694 | +383 | 12.2% |
| Humana Inc. | 582 | −64 | 10.2% |
| CareSource | 56 | new | 1.0% |
| Centene Corporation | 54 | −34 | 0.9% |
| General Catalyst Group Management Holdings LP | 43 | +13 | 0.8% |
| Trinity Health Corporation | 39 | +14 | 0.7% |
| The Schroer Group, Inc. | 14 | 0 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,670 beneficiaries in Seneca County were assigned to 31 Medicare Shared Savings Program ACOs, 43.4% of assignable Original Medicare beneficiaries. Together, roughly 67% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.