• Chair Department of Surgery
  • UCI
  • Orange, CA United States


Dr. Nguyen is the John E Connolly Professor and Chair for the department of Surgery at the University of California Irvine Medical Center, Orange, California. He is also the Chief of the Division of Gastrointestinal Surgery and Director of bariatric surgery.Dr. Nguyen is an internationally recognized surgeon respected for his work in the development of minimally invasive esophagectomy and gastrectomy procedures for cancer, and laparoscopic Roux-en-Y gastric bypass surgery for the treatment of morbid obesity. As a pioneer in the field of bariatric surgery, Dr. Nguyen plays an instrumental role in the development of the current accreditation system for bariatric surgery in the United States – the MBSAQIP. He participates in many regional and national society leadership roles, including past president of the American Society for Metabolic and Bariatric Surgery (ASMBS) and past president of the Southern California chapter of the American College of Surgeons.Dr. Nguyen is the editor-in-chief for the ASMBS Textbook of Bariatric Surgery and have served on the American Board of Surgery Gastrointestinal Surgery Advisory Council. He also serves on the editorial board for multiple high-impact surgical journals, including the Journal of the American College of Surgeons, Surgery for Obesity and Related Disorders and Annals of Surgery. He has been the principal investigator on numerous research grants and has published more than 300 peer-reviewed articles, book and book chapters. Dr. Nguyen is a member of the American Surgical Association. A well-respected educator, he has served as the director of the minimally invasive surgery fellowship program for the past 17 years. Dr. Nguyen received his medical degree from the University of Texas Health Science Center at San Antonio. He completed his general surgery residency training at Mount Sinai Medical Center in Miami, followed by fellowships in surgical oncology and minimally invasive surgery at the University of Pittsburgh Medical Center.