James M. Trenbeath, MD

Dr. Trenbeath attended medical school at the University of North Dakota and graduated from George Washington University of Medical School. He completed his internship and residency at the University of Missouri Medical Center , and his fellowship at LA County/USC Medical Center. Board certified in Internal Medicine and Gastroenterology, Dr. Trenbeath has been on staff at Saddleback Memorial Medical Center for two decades.

In his free time, Dr. Trenbeath enjoys skiing and fly fishing. He lives in San Juan Capistrano with his wife and three children.

This physician is a member of MemorialCare Physician Society which drives clinical outcomes and performance for MemorialCare Health System.


  • Gastroenterology
  • Internal Medicine

Types of Care

MemorialCare Hospital Affiliations