A primary care provider (PCP) is a doctor, nurse practitioner or physician's assistant who acts as a patient's main health care provider for common medical issues. A PCP refers patients to a specialist when needed. Boston Children's Hospital has a network of over 250 physicians as part of the Pediatric Physicians Organization at Children's Hospital (PPOC).Listen as Eileen Costello, MD, discusses how at Boston Children's Hospital we provide a variety of clinicians to help deliver the best possible care. Our team of physicians and nurses has been recognized by a number of independent organizations for overall excellence.