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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.
Board Certifications
American Board of Internal Medicine, Gastroenterology, 1981
American Board of Internal Medicine, Internal Medicine, 1976
Medical Education
George Washington University, MD, 1973
Residencies
University of Southern California School of Medicine, MD, Internal Medicine, 1977
Fellowships
University of California at Irvine Medical Center, MD, Gastroenterology, 1981
