Co-Occurring Disorders

Co-occurring disorders are a combination of a substance use disorder (abuse or dependence) and another mental disorder, as established in the fourth text revision edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR) of the American Psychological Association. It is estimated that 50% to 70% of people diagnosed with either a mental disorder or a substance use disorder will have a co-occurring disorder of the other type; therefore, it is crucial to address the topic of co-occurring disorders. This entry discusses a brief history of co-occurring disorders, incidence and prevalence, screening, assessment, treatment planning, treatment interventions and programs, and evidence-based practices. A list of resources for further information is also included.