This industry comprises establishments primarily engaged in providing residential care and treatment for patients with mental health and substance abuse illnesses. These establishments provide room, board, supervision, and counseling services. Although medical services may be available at these establishments, they are incidental to the counseling, mental rehabilitation, and support services offered. These establishments generally provide a wide range of social services in addition to counseling. Illustrative Examples: Alcoholism or drug addiction rehabilitation facilities (except licensed hospitals) Psychiatric convalescent homes or hospitals Mental health halfway houses Residential group homes for the emotionally disturbed Cross-References. ? Establishments primarily engaged in providing treatment of mental health and substance abuse illnesses on an exclusively outpatient basis are classified in Industry 621420, Outpatient Mental Health and Substance Abuse Centers; ? Establishments primarily engaged in providing residential care for persons diagnosed with mental retardation are classified in Industry 623210, Residential Mental Retardation Facilities; and ? Establishments known and licensed as hospitals primarily engaged in providing inpatient treatment of mental health and substance abuse illnesses with an emphasis on medical treatment and monitoring are classified in Industry 622210, Psychiatric and Substance Abuse Hospitals.