Douglas L. Nguyen, MD, gastroenterologist

Douglas L. Nguyen, MD


Gastroenterology, Internal Medicine

Clinical Interests

Chronic liver disease, High-risk inflammatory bowel disease, Immunonutrition therapy for chronic inflammatory diseases and cancers, Irritable bowel syndrome, Specialized nutrition support for chronic illnesses and cancer

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  • American Board of Internal Medicine, Gastroenterology [Internal Medicine]
  • American Board of Internal Medicine, Internal Medicine
  • English
  • Vietnamese
Medical School
University of Cincinnati College of Medicine
Mayo Clinic College of MedicineInternal Medicine
University of California IrvineGastroenterology
Professional Positions
  • Assistant Professor — Division of Gastroenterology, Department of Medicine
  • Member — American Gastroenterology Association
  • Member — American College of Gastroenterology
  • Member — Crohn's and Colitis Foundation of America
Awards and Recognition
Outstanding Research Award — Mayo Clinic Internal Medicine Residency Program
International Health Program Scholarship — Mayo School of Graduate Medical Education
More Information

Dr. Douglas L. Nguyen is fellowship-trained UCI Health specialist in gastroenterology and hepatology. He has additional expertise in inflammatory bowel disease. His clinical interests include high-risk inflammatory bowel disease, intestinal failure, irritable bowel syndrome and chronic liver disease.

Nguyen also provides comprehensive clinical nutrition support for patients with gastrointestinal diseases. His goal is to improve his patients’ digestive health and quality of life through specialized medical and nutritional therapies. He is particularly interested in the role of immunonutrition as both a primary therapy and adjunct therapy for the management of chronic inflammatory diseases and cancers.

He has shared his clinical expertise at numerous local, national and international meetings. He also is the author of multiple peer-review publications and book chapters on inflammatory bowel disease, liver disease, short bowel syndrome and specialized nutritional support in high-risk populations.

Nguyen earned his medical degree at the University of Cincinnati School of Medicine in Ohio. He completed an internal medicine residency at Mayo Clinic in Rochester, Minn., followed by a fellowship in gastroenterology and hepatology at UC Irvine Medical Center. He also received additional training in high-risk inflammatory bowel disease, specialized nutrition support and management of chronic liver disease.

UCI Health H.H. Chao Comprehensive Digestive Disease Center
101 The City Drive South, Building 22C
Orange, CA 92868
Phone: 888-717-4463
UCI Health Digestive Disease Center — Newport
Pacific Medical Plaza
1640 Newport Blvd., Suite 350
Costa Mesa, CA 92627
Phone: 888-717-4463
UCI Health — Tustin
1451 Irvine Blvd.
Tustin, CA 92780
Phone: 714-838-8408
Fax: 714-838-0003