The SASSI Institute is pleased to announce the publication of its newest manuscript “Mental Health and Substance Use Disorder Co-Morbidities Among Teens in Treatment: SASSI-A3 Correlations in Screening Scores.” Within this article, we review data from teenagers in treatment focusing on mental health diagnoses alongside a DSM-5 diagnosis of substance use disorder. Our hope is that by identifying possible correlations between SASSI-A3 scale scores and diagnosed mental health disorders, (depression and anxiety in particular), will provide clinicians with additional tools to direct the course of subsequent clinical interviews, in particular for teens suffering from co-occurring disorders. This Open-Access article is available here: Mental Health and Substance Use Disorder Co-Morbidities Among Teens in Treatment: SASSI-A3 Correlations in Screening Scores