Substance use and co-occurring mental health conditions, also known as dual diagnosis, refer to the simultaneous presence of a substance use disorder alongside a mental health disorder. This complex condition is increasingly common and can significantly affect an individual’s ability to function day to day. Substance use remains a major health and safety concern in the United States, costing billions of dollars annually in healthcare. Research has shown that dual diagnosis impacts an individual’s overall functioning, and if left untreated, it can lead to poor health outcomes.