Substance use treatment; Outpatient; Intensive outpatient treatment; Regular outpatient treatment; Naltrexone used in Treatment; No formal relationship with prescribing entity; Accepts clients using medication assisted treatment for alcohol use disorder but prescribed elsewhere; No formal relationship with prescribing entity; Accepts clients using MAT but prescribed elsewhere; Naltrexone (oral); Medication for mental disorders; Brief intervention; Cognitive behavioral therapy; Motivational interviewing; Matrix Model; Relapse prevention; Substance use disorder counseling; Telemedicine/telehealth therapy; Trauma-related counseling; 12-step facilitation; Private for-profit organization; State Substance use treatment agency; State mental health department; State department of health; IHS/Tribal/Urban (ITU) funds; Private health insurance; Cash or self-payment; Sliding fee scale (fee is based on income and other factors); Adolescents; Clients with co-occurring mental and substance use disorders; Clients with co-occurring pain and substance use disorders; Comprehensive mental health assessment; Comprehensive substance use assessment; Interim services for clients; Screening for tobacco use; Screening for substance use; Screening for mental disorders; Drug or alcohol urine screening; TB screening; Aftercare/continuing care; Discharge Planning; Naloxone and overdose education; Assistance with obtaining social services; Substance use disorder education; Smoking/vaping/tobacco cessation counseling; Individual counseling; Group counseling; Family counseling; Marital/couples counseling; Smoking not permitted; Children/adolescents; Female; Male; Specially designed program for DUI/DWI clients; Sign language services for the deaf and hard of hearing; Vaping not permitted; Case management service; Mental health services; Social skills development; Integrated primary care services; Suicide prevention services