Megan Oser, PhD

Megan Oser, PhD

Psychology| Gastroenterology
Accepting new patients
Primary Location
Westwood Digestive Diseases
100 Medical Plaza
Suite 205
Los Angeles, California 90024


  • Director, Behavioral Medicine in Digestive Health

 Dr. Oser is a licensed clinical psychologist specializing in behavioral medicine, digital health and gastroenterology/hepatology. Dr. Oser earned her PhD in clinical psychology from the University of Nevada, Reno. She completed a health services research fellowship at the VA Palo Alto Health Care System and Stanford University School of Medicine.
Prior to joining UCLA, Dr. Oser held leadership positions at Brigham and Women’s Hospital, Harvard Medical School, and in digital health technology companies, where she led the clinical and scientific strategy.
Dr. Oser was director of the CBT and Behavioral Medicine Program in the Department of Psychiatry at Brigham and Women’s Hospital, where she advanced cognitive behavioral therapy (CBT) clinical services and research. Her work focused on transdiagnostic CBTs for co-occurring medical and behavioral health conditions. She developed and tested novel CBTs including mindfulness-based treatments and e-health/mobile applications, integrating this work across several specialty care departments (GI/hepatology, cardiology, transplant, neurology and infectious disease). Dr. Oser directed the CBT curriculum for the Harvard Longwood Psychiatry Residency Training Program and provided clinical training to dozens of trainees, Harvard Medical School students and clinical professionals. She treated patients with co-occurring behavioral health conditions, including patients with IBS, IBD and liver disease. These treatments included acceptance and commitment therapy (ACT), mindfulness-based behavioral therapy, dialectical behavior therapy, behavioral activation and exposure and response prevention.
Within the digital health industry, Dr. Oser was the director of research for a digital health company providing cognitive behavioral programs delivered via mobile app. She led the company’s efforts to demonstrate clinical effectiveness and economic impact in commercially relevant settings. Prior to joining UCLA, Dr. Oser was VP of Clinical Innovation at a GI-focused digital therapeutics start-up. They were the first company to obtain FDA authorization for software-as-a-medical-device within gastroenterology to prescribe as a digital therapeutic (delivered via mobile app).
Dr. Oser has published 25 peer-reviewed articles, authored several book chapters, delivered national and international presentations and invited trainings and served as a reviewer for numerous scientific journals. She previously served on the editorial board of the Journal of Contextual Behavioral Science.
Dr. Oser was recruited to UCLA to develop a comprehensive GI behavioral medicine program. She is a faculty member in the Vatche and Tamar Manoukian Division of Digestive Diseases and serves as director of Behavioral Medicine in Digestive Health, where she leads the multidisciplinary team in the Integrated Digestive Health and Wellness Program. She also provides treatment for patients with a range of gastrointestinal conditions.





Stanford University School of Medicine and Center for Health Care Evaluation, VA Palo Alto Healthcar, 2011


VA Palo Alto Health Care System, 2008


University of Nevada, Reno, PhD, 2008