Programs offered in special units of general acute care hospitals that provide diagnostic and treatment services for children, adolescents, adults and/or older adults who have acute or chronic mental or emotional disturbances, require hospitalization for maximum benefit, and who might be a threat to themselves, to their families or to others if left in the community or placed in a less restrictive treatment setting. Services may include a comprehensive evaluation; 24-hour care in a supportive, therapeutic environment; counseling for the patient and family; adjunctive therapies as needed; medication, if required; and an aftercare program following discharge.