PRIMARY CARE PHYSICIAN

Primary Care Physician in general term is a family doctor or the doctor one who is visited by the patient first for any kind of health problem. Primary care physicians are also called Gate Keepers, as they are the ones who are contacted first by the patient.
PCP is also called referring doctor

Ordering Physician: Ordering Physician is a physician who orders for non-physician services for the patient such as diagnostic laboratory tests, clinical laboratory tests, pharmaceutical services, and durable medical equipment
Unique Physician Identification Number (UPIN).
FACILITY PROVIDERS
Following are the most common facility providers:
1 Hospitals
2 Ambulatory Surgery Center (ASC)
3 Skilled Nursing Facility (SNF)
4 Home Health
5 Hospice