This research investigates the implementation of Routine Outcome Monitoring (ROM) and feedback at the new ICAMH clinic for the treatment of addiction and double diagnosis. ROM, a pivotal component in modern psychotherapy, involves systematic assessments of patients’ progress by employing standardized tools to measure mental health aspects such as symptom severity and overall functioning. The ICAMH clinic integrates ROM into its treatment protocols in two primary stages: Raw Score Feedback and Expected Treatment Response (ETR). Initially, patient progress is monitored against standardized functional norms, while later stages utilize ETR curves that align patient progress with expected treatment responses based on accumulated clinical data. This study aims to elucidate how ROM enhances therapeutic effectiveness, facilitates personalized treatment adjustments, and supports clinical training and research. By implementing ROM, the clinic not only aims to refine treatment efficacy but also enhances patient engagement and therapist training, potentially setting new standards for clinical practice in mental health and addiction therapy.