Wikipedia
Preferred provider organization
In health insurance in the United States, a preferred provider organization (or PPO, sometimes referred to as a participating provider organization or preferred provider option) is a managed care organization of medical doctors, hospitals, and other health care providers who have agreed with an insurer or a third-party administrator to provide health care at reduced rates to the insurer's or administrator's clients.
Usage examples of "preferred provider organization".
Although they had been trying to form a preferred provider organization with a large insurance company and Blue Shield, they were not having much luck.