Conducting a screening and assessment requires a fundamental understanding of how substance use disorders (SUD), alcohol use disorders (AUD), and opioid use disorders, (OUD) may reflect itself in observable symptomology. This interactive training will define addiction, highlight the criteria for SUD, and will integrate a public health approach to further discuss the physiological, psychological, and behavioral indicators that help inform a screening and assessment process including withdrawal signs and risks associated with the presenting symptoms. Treatment modalities, multidimensional assessment, and overall information gathering will also be discussed.