Medicare Advantage in Defiance County, Ohio
5,017 people in Defiance County, Ohio were enrolled in Medicare Advantage in October 2026, 51.5% of 9,733 eligible beneficiaries (+1.2 pts since October 2025). CVS Health Corporation is the largest parent organization with 40% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,879 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 660 members here are in plans that terminate or leave the county. MA plans offered go from 43 to 36.
Parent organizations in Defiance County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 1,999 | +755 | 40.1% |
| UnitedHealth Group, Inc. | 1,575 | +112 | 31.6% |
| Elevance Health, Inc. | 598 | −301 | 12.0% |
| Humana Inc. | 534 | −14 | 10.7% |
| Devoted Health, Inc. | 141 | +101 | 2.8% |
| CareSource | 42 | new | 0.8% |
| Centene Corporation | 39 | −31 | 0.8% |
| The Schroer Group, Inc. | 15 | +2 | 0.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 14 | −3 | 0.3% |
| Trinity Health Corporation | 13 | new | 0.3% |
| Highmark Health | 11 | −1 | 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, 1,622 beneficiaries in Defiance County were assigned to 22 Medicare Shared Savings Program ACOs, 42.3% of assignable Original Medicare beneficiaries. Together, roughly 72% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.