Medicare Advantage in Williams County, Ohio
4,360 people in Williams County, Ohio were enrolled in Medicare Advantage in October 2026, 46.1% of 9,449 eligible beneficiaries (+0.3 pts since October 2025). CVS Health Corporation is the largest parent organization with 40% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,806 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 507 members here are in plans that terminate or leave the county. MA plans offered go from 36 to 39.
Parent organizations in Williams County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CVS Health Corporation | 1,726 | +572 | 39.8% |
| Humana Inc. | 1,121 | +247 | 25.9% |
| UnitedHealth Group, Inc. | 912 | +219 | 21.0% |
| Elevance Health, Inc. | 441 | −501 | 10.2% |
| Centene Corporation | 49 | −42 | 1.1% |
| CareSource | 46 | new | 1.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 38 | +1 | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 319 beneficiaries in Williams County were assigned to 31 Medicare Shared Savings Program ACOs, 8.6% of assignable Original Medicare beneficiaries. Together, roughly 51% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.