 Study participants will be contacted by telephone at 6-months post discharge from intensive SUD treatment. The two groups Intensive Referral v. Standard Referral will be compared on measures of substance use, addiction severity, trauma symptoms, family support, support group attendance and involvement and satisfaction with the referral process. The investigators also will determine whether veterans with a co-occurring PTSD diagnosis benefit more from the enhanced intensive referral compared to standard referral and the investigators will determine whether 6-month abstinence rates are lower for those with family support compared to those without family support. 