Medicare Advantage in Knox County, Ohio
8,296 people in Knox County, Ohio were enrolled in Medicare Advantage in October 2026, 55.1% of 15,047 eligible beneficiaries (+0.5 pts since October 2025). Humana Inc. is the largest parent organization with 32% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,416 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 852 members here are in plans that terminate or leave the county. MA plans offered go from 48 to 40.
Parent organizations in Knox County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 2,619 | +538 | 31.8% |
| CVS Health Corporation | 2,539 | +390 | 30.8% |
| UnitedHealth Group, Inc. | 1,211 | −61 | 14.7% |
| Trinity Health Corporation | 1,137 | +181 | 13.8% |
| Elevance Health, Inc. | 566 | −506 | 6.9% |
| CareSource | 74 | new | 0.9% |
| The Health Plan of West Virginia, Inc. | 33 | new | 0.4% |
| Molina Healthcare, Inc. | 30 | new | 0.4% |
| Centene Corporation | 29 | −25 | 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, 3,171 beneficiaries in Knox County were assigned to 43 Medicare Shared Savings Program ACOs, 61.7% of assignable Original Medicare beneficiaries. Together, roughly 83% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.