Substance use disorders can be particularly confusing to report. How do you match documentation that aligns with DSM-5 descriptions to those descriptions found in ICD-10-CM? When should a patient be considered as on long-term opiates vs. dependent on opiates? Which diagnosis codes should be used when a patient is on MAT therapy? When is remission appropriate vs. withdrawal? We’ll use Official ICD-10-CM Guidelines, AHA Coding Clinics, and other trusted resources to answer these and other tough questions regarding reporting for substance use disorders.