 While the populations of interest for this study are rural and highly rural Veterans, rural and highly rural status will be defined by zip code of residence at the time the follow-up questionnaire is administered, six months after discharge from SUD treatment. Patients may be admitted from a rural zip code but at discharge move to a residence in an urban zip code. The investigators will initially compare outcomes between all participants who received the Intensive Referral and those who received Standard Referral. The investigators will then compare outcomes between the two groups Intensive Referral v. Standard Referral in those veterans who are living in rural or very rural zip codes at six months post-discharge. 