Professional diagnostic and therapeutic services rendered by a physician, physician’s assistant, clinical nurse specialist, or nurse practitioner in an outpatient setting such as a clinic, medical office, mobile van or other location where patients generally do not stay overnight. Emergency room services are not outpatient settings. Services include diagnostic testing; early intervention and risk assessment; preventive care; screenings; and vaccinations for hepatitis A and B, flu and pneumonia. Other services include examination by practitioner, medical history taking, diagnosis and treatment of common physical and mental conditions, prescribing and managing medication therapy, treatment adherence, education and counseling on health issues, well-baby care, continuing care and management of chronic conditions, and referral to and provision of specialty care in all medical subspecialties. Primary medical care for the treatment of HIV infection includes care consistent with the U.S. Public Health Service’s guidelines.