Effective assessment is crucial in treating patients with comorbid OCD and EDs. It is important for providers to create comprehensive treatment plans by combining current empirical evidence, their own clinical judgment, and the patient’s willingness to participate in interventions. The success of this process largely depends on the thoroughness of the initial assessment and ongoing follow-up. There is no established treatment manual or approach for addressing both disorders, so a comprehensive approach that combines current empirical evidence, clinical judgment, and the patient’s willingness to participate in interventions is needed. Medical stability is of utmost importance when treating individuals with EDs. Identifying the chief complaint can be difficult due to the overlap of symptoms, and understanding the timeline of symptoms and data from assessment measures is useful, but understanding the specific rituals, rules, and avoided stimuli is the true key to identifying which disorder should be targeted more.