| Aetna | Alliance |
| Americhoice | Arise |
| Anthem | BlueCross BlueShield |
| Cigna | Coresource |
| Golden Rule | Humana |
| HCH | Health Payment Systems |
| iCare | Medicare |
| Medicaid | Network Health Plan |
| Prevea | Prairie States |
| Professional Benefit Administration | Quadmed |
| Triology | Tricare |
| Trustmark | United Healthcare |
| UMR | WIDS |
| WEA | WPS |