Substance use treatment; Detoxification; Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Outpatient; Residential/24-hour residential; Intensive outpatient treatment; Residential detoxification; Naltrexone used in Treatment; In-network prescribing entity; No formal relationship with prescribing entity; Does not use medication assisted treatment for alcohol use disorder; This facility administers/prescribes medication for alcohol use disorder; In-network prescribing entity; No formal relationship with prescribing entity; Accepts clients using MAT but prescribed elsewhere; Naltrexone (extended-release, injectable); Private non-profit organization; State Substance use treatment agency; Federal, or any government funding for substance use treatment programs; IHS/Tribal/Urban (ITU) funds; Medicare; Medicaid; Private health insurance; Cash or self-payment; State-financed health insurance plan other than Medicaid; Clients with co-occurring mental and substance use disorders; Comprehensive mental health assessment; Comprehensive substance use assessment; Outreach to persons in the community; Screening for substance use; Screening for mental disorders; Breathalyzer or blood alcohol testing; Drug or alcohol urine screening; TB screening; Testing for Hepatitis C (HCV); Aftercare/continuing care; Discharge Planning; Naloxone and overdose education; Alcohol Detoxification; Benzodiazepines Detoxification; Cocaine Detoxification; Methamphetamines detoxification; Opioids detoxification; Medication routinely used during detoxification; Substance use disorder education; Individual counseling; Group counseling; Smoking permitted in designated area; Children/adolescents; Female; Male; Mental health services