- 10,275
- Aetna Life Insurance Company
- Anthem Blue Cross
- AultCare Insurance Company
- Buckeye Community Health Plan
- CareSource
- Coordinated Health Mutual, Inc.
- Coventry Health and Life Insurance Company (Health America)
- Humana Health Plan of Ohio
- Kaiser Foundation Health Plan of Ohio
- Medical Health Insuring Corporation of Ohio
- Medical Mutual
- Molina Healthcare of Ohio
- Paramount Insurance Company
- Time Insurance Company
- United Healthcare Insurance Company