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