OBJECTIVES/SPECIFIC AIMS: Objective: Identify barriers and facilitators of positive patient-provider interactions for AAN patients. METHODS/STUDY POPULATION: Methods: Using a mixed-methods, longitudinal, patient-interview design, N = 29 (to date) women with a history of AAN have been enrolled. Each patient completed a diagnostic interview and standardized surveys to establish ED diagnosis, severity, and associated psychopathology. Transcribed, semi-structured qualitative interviews are assessed for common themes using content analysis methods. RESULTS/ANTICIPATED RESULTS: Anticipated Results: Patients aged 18 to 74 (M = 36.3, SD = 12.0), with mean BMI = 39.8 (22.7-61.1; SD = 11.3), and mean weight suppression (lbs) during their illness = 119.41 (SD = 69.3). Women reported a mean=12.75 years (0-37 years, SD = 10.5) treatment delay. Qualitative analysis revealed the following barriers in healthcare provider interactions: 1) experiences of provider weight-bias, 2) low specificity in ED screening questions, 3) lack of indicated screening procedures/diagnostic tests (orthostatic screening, EKG, food log, labs), and 4) provider praise of ED behaviors. Facilitators: 1) lower BMI at presentation, 2) provider education in EDs, 3) community-provider collaboration, and 4) patient self- and family- advocacy. DISCUSSION/SIGNIFICANCE OF IMPACT: Discussion: Unfortunately, while early intervention best predicts positive outcomes, higher-weight patients in this study experienced significant treatment delay. Translationally, it is taking too long for AAN patients to receive the right treatment at the right time. However, findings indicate that interventions at the provider level (increasing ED education, building community partnerships, increased adherence to screening protocols) could improve screening, diagnostic, and referral practices—and ultimately long-term outcomes for this unique patient population.