Despite recent gains in understanding the links between intimate partner violence and substance abuse by women, the service issues related to these cooccurring problems are relatively unexplored. This study addresses 3 practice-related questions critical to the provision of services in coordinated or integrated substance abuse and intimate partner violence programs: (a) Are different “doors” to service associated with different outcomes? (b) Does the level of substance use prior to the onset of services predict changes in self-efficacy or vulnerability to battering? and (c) How does proximity of violence impact program outcomes? We followed 128 women for 6 months after admission to a state-funded demonstration project on cooccurring substance abuse and intimate partner violence on outcomes of self-efficacy, fear of violence, and substance use. The relationship between outcomes and door to service, substance use, and acuity of violence were examined using contingency analysis, analysis of covariance, and logistic regression. We discuss the findings and applications of the research to practice.