- Phone Number
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Dr. Mark Johnson is a gastroenterologist and has more than 35 years of medical experience. He can help patients suffering from Crohn’s disease, colitis, diverticulitis, irritable bowel syndrome and other conditions. He welcomes new patients.
- American Board of Internal Medicine, Gastroenterology, 1981
- American Board of Internal Medicine, Internal Medicine, 1976
- George Washington University, MD, 1973
- University of Southern California School of Medicine, MD, Internal Medicine, 1977
- University of California at Irvine Medical Center, MD, Gastroenterology, 1981