This document summarizes a presentation on best practices for treating opioid addiction in the criminal justice population. It outlines the challenges of treatment in this population and identifies best practices for using medication-assisted treatment (MAT) and behavioral therapy. The presentation reviews key points from the ASAM National Practice Guideline, including that MAT is the standard of care for opioid use disorder and should be continued, initiated, or made available for inmates. Discontinuing treatment can be dangerous and contradicts evidence-based practices. The implications discussed are that the guideline supports higher quality care for inmates and a rehabilitative approach, while also helping to address the opioid epidemic.