This industry comprises establishments with medical staff primarily engaged in providing general or specialized outpatient care (except family planning centers and outpatient mental health and substance abuse centers). Centers or clinics of health practitioners with different degrees from more than one industry practicing within the same establishment (i.e., Doctor of Medicine and Doctor of Dental Medicine) are included in this industry. Illustrative Examples: Dialysis centers and clinics Outpatient biofeedback centers and clinics Freestanding ambulatory surgical centers and clinics Outpatient community health centers and clinics Freestanding emergency medical centers and clinics Outpatient sleep disorder centers and clinics Health maintenance organization (HMO) medical centers and clinics Cross-References.