- Aetna
- Assurant Health
- Averde Health
- Beachstreet
- Blue Cross Blue Shield
- Cigna Open Access
- Coventry
- First Health
- Galaxy Health Network
- Great West Health Care
- HealthSmart
- Humana
- IMS
- Medicare
- Prime Health Services
- Private Healthcare Systems
- Scott & White Health Care
- Texas True Choice
- United Healthcare
- United Healthcare Medicare