OBJECTIVES/SPECIFIC AIMS: This is a prospective, longitudinal cohort study correlating postoperative opioid use, prescription availability at discharge and patient use at home using survey methodology and longitudinal cohort data. The primary objectives of this project are twofold. First, we will determine whether the number of opioid pills prescribed after surgery increases the risk of abuse, diversion and conversion to chronic use. Next, we will determine whether patient and parent characteristics, behavioral factors and medical comorbidities increase the risk of opioid abuse, diversion and conversion to chronic use after surgery. METHODS/STUDY POPULATION: A mixed-methods approach will be employed utilizing retrospective and prospective medical record review, survey methodology, and longitudinal cohort matching with California’s Controlled Substance Utilization Review and Evaluation System (CURES) reports of opioid usage. Surveys will be administered before and after surgery and will capture both parent and patient level factors that may influence longitudinal opioid use. Adolescents and young adults 13-20 years old discharged from Children’s Hospital Los Angeles undergoing one of seven procedures most commonly associated with an opioid prescription at time of discharge (spinal fusion, arthroscopy, bowel resection for inflammatory bowel disease, pectus excavatum repair, tonsillectomy, pilonidal excision and hip reconstruction) will be enrolled. RESULTS/ANTICIPATED RESULTS: Inpatient and outpatient opioid usage will predict incidence of diversion, abuse and conversion to chronic usage. Furthermore, socioeconomic factors and behavioral comorbidities such as anxiety and depression will be identified as predictors of diversion, abuse and conversion to chronic opioid use. DISCUSSION/SIGNIFICANCE OF IMPACT: This study will be one of the first to identify opioid prescribing variation in children who require surgery and will identify multiple provider, patient and family level factors influencing use. Furthermore, it will identify factors predictive of possible diversion, abuse and conversion to chronic use. The results of this exploratory analysis will lay the foundation for future studies utilizing physician decision support tools, aid in crafting “best practice” patterns and clinical benchmarks for opioid prescribing, and serve to inform policy makers on the most impactful ways to optimize opioid prescribing practices for adolescents who require surgery.