James D. Leo, MD

Dr. Leo was born and raised in Hollywood, California. After experiencing New England life and weather while attending the Massachusetts Institute of Technology for undergraduate studies in Biology, he fled back to the warmth of California. However, he made a right turn instead of a left turn, and ended up in medical school at the University of California, San Francisco, thereby trading in the cold winters of Massachusetts for the constant fog of San Francisco.

After receiving his Medical Degree in 1981, Dr. Leo finally made it back home to Southern California, where he has remained warmly and happily since. After completing residencies in Emergency Medicine and Internal Medicine, with a one-year stint as an Emergency Department Director in between, he established his practice in Internal Medicine and Critical Care Medicine in Long Beach. Dr. Leo serves as the Medical Director of Best Practice and Clinical Outcomes for the MemorialCare Health System, overseeing the implementation of evidence-based medicine into the electronic health record across the MemorialCare system. His private practice emphasizes wellness and disease prevention.

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

This physician or health care professional uses an electronic medical record system.
This physician or health care professional uses myMemorialCare to access and store patient health information via the Epic ambulatory electronic medical record system. Patients of this practice may also securely view their health information online via myMemorialCare (MyChart), Epic’s patient portal.


  • Critical Care Medicine
  • Internal Medicine


Medical Education
UC San Francisco School of Medicine
Date Completed:
July 1 1981
Long Beach Memorial Medical Center

MemorialCare Hospital Affiliations