Substance use treatment; Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Outpatient; Regular outpatient treatment; Naltrexone used in Treatment; Does not use medication assisted treatment for alcohol use disorder; Does not use MAT for opioid use disorders; Acamprosate (Campral®); Naltrexone (oral); Naltrexone (extended-release, injectable); Clonidine; Medication for mental disorders; Non-nicotine smoking/tobacco cessation; Anger management; Cognitive behavioral therapy; Motivational interviewing; Relapse prevention; Substance use disorder counseling; Telemedicine/telehealth therapy; Trauma-related counseling; Private non-profit organization; The Joint Commission; Federal, or any government funding for substance use treatment programs; Medicare; Medicaid; Federal military insurance (e.g., TRICARE); Private health insurance; Cash or self-payment; Adolescents; Young adults; Adult women; Adult men; Seniors or older adults; Clients with co-occurring mental and substance use disorders; Comprehensive mental health assessment; Comprehensive substance use assessment; Screening for tobacco use; Screening for substance use; Screening for mental disorders; Breathalyzer or blood alcohol testing; Drug or alcohol urine screening; Discharge Planning; Treatment for gambling disorder; Treatment for other addiction disorder; Substance use disorder education; Smoking/vaping/tobacco cessation counseling; Individual counseling; Group counseling; Marital/couples counseling; Smoking not permitted; Seniors; Female; Male; Sign language services for the deaf and hard of hearing; Vaping not permitted; Mental health services; Suicide prevention services