Which is responsible for supervising and coordinating health care services for enrollees?

The primary care provider (PCP) plays a crucial role in supervising and coordinating health care services for enrollees. The PCP serves as the first point of contact for patients within the health care system. They are responsible for managing a patient's overall care, which includes diagnosing health issues, recommending treatment options, and referring patients to specialists when necessary. This coordination ensures that patients receive appropriate care that fits their medical needs and maintains continuity of care.

In systems where a PCP is used, enrollees often have a more integrated experience, as their health records and treatment plans are primarily managed by the same provider. This centralized approach can lead to better health outcomes, as the PCP has a comprehensive view of the patient's health history and can address various health concerns in a coordinated manner.

The other options do not fulfill this specific role of coordinating care in the same way. A preferred provider organization primarily refers to a network rather than an individual responsible for care coordination. A fee-for-service plan allows patients to receive services without requiring a unique coordinating entity, while a national copayment plan typically focuses on cost-sharing rather than care management. Thus, the primary care provider stands out as the entity responsible for overseeing and facilitating the overall health care experience for enrollees.