The prevalence of history of head trauma along with reported sequelae as a result of such in this sample suggests that head trauma may certainly be a significant factor in persons presenting for substance abuse treatment. Assessing for a history of head trauma and associated sequelae in persons presenting in substance abuse treatment programs may be clinically appropriate as such sequelae have been found to adversely affect treatment progress. Further discussion on implications of the results of this research as well as discussion on further research in the area are provided.