Substance use treatment; Transitional housing, halfway house, or sober home; Outpatient; Outpatient day treatment or partial hospitalization; Intensive outpatient treatment; Regular outpatient treatment; Naltrexone used in Treatment; In-network prescribing entity; Does not use medication assisted treatment for alcohol use disorder; Prescribes naltrexone; Accepts clients using MAT but prescribed elsewhere; Naltrexone (extended-release, injectable); Private for-profit organization; The Joint Commission; IHS/Tribal/Urban (ITU) funds; Medicaid; Private health insurance; Cash or self-payment; State-financed health insurance plan other than Medicaid; Young adults; Adult women; Pregnant/postpartum women; Adult men; Seniors or older adults; Lesbian, gay, bisexual, transgender, or queer/questioning (LGBTQ); Veterans; Criminal justice (other than DUI/DWI)/Forensic clients; Clients with co-occurring mental and substance use disorders; Clients with co-occurring pain and substance use disorders; Clients who have experienced sexual abuse; Clients who have experienced trauma; Comprehensive substance use assessment; Outreach to persons in the community; Screening for substance use; Drug or alcohol urine screening; Aftercare/continuing care; Discharge Planning; Naloxone and overdose education; Outcome follow-up after discharge; Self-help groups; Recovery coach; Medication routinely used during detoxification; Substance use disorder education; Individual counseling; Group counseling; Family counseling; Smoking permitted in designated area; Adults; Seniors; Young adults; Female; Male; Vaping permitted in designated area; Case management service