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; No formal relationship with prescribing entity; Accepts clients using MAT but prescribed elsewhere; Clonidine; Medication for mental disorders; Private for-profit organization; State Substance use treatment agency; State department of health; Medicare; Medicaid; Private health insurance; Cash or self-payment; State-financed health insurance plan other than Medicaid; Comprehensive mental health assessment; Outreach to persons in the community; Screening for tobacco use; Screening for substance use; Screening for mental disorders; Discharge Planning; Outcome follow-up after discharge; Treatment for other addiction disorder; Individual counseling; Group counseling; Family counseling; Marital/couples counseling; Smoking permitted in designated area; Female; Male; Mental health services