Dr. Richard Johnson graduated from the University of Louisville School of Medicine. He also did a residency in internal medicine and a fellowship in pulmonary disease at the University of Southern California- LAC+USC Medical Center. He is board certified in the field of internal medicine and pulmonary disease. He has been in practice for 20 years and currently affiliated with the Foothill Presbyterian Hospital and San Dimas Community Hospital. Dr. Johnson is a member of the American College of Surgeons.