- Aetna - Beech Street - Blue Cross Blue Shield - Bravo (Medicare HMO) - CIGNA - Coventry / First Health - Employers Health Network - Freedom of Choice PPO - Great-West Healthcare - HealthSmart PPO - HealthSmart EPO - Humana - IMS - Interplan Health Group (IHG) - Medicare (and we file secondaries) - Medicaid (Traditional only) - Memorial Hermann HNP - Pacificare - PHCS - PPO Next - Principal - Provider Select PPO - Texas True Choice - Three Rivers - UMR - Unicare - UnitedHealthcare - Wellcare - Work Link