Dr. Simpson is Professor of Medicine and Clinical Professor of Epidemiology at the University of North Carolina, Chapel Hill.  Dr. Simpson completed his medical degree at Georgetown University School of Medicine in Washington, DC, and followed that with an internship and residency in internal medicine and a fellowship in cardiology at the University of Illinois Hospital in Chicago. He received both his PhD and MPH in Epidemiology from the UNC School of Public Health.  

Dr. Simpson is Board Certified in Internal Medicine and Cardiovascular Disease and certified by the National Board of Medical Examiners. He is a Fellow of the American College of Cardiology and the American College of Physicians and a Fellow of the National Lipid Association. Dr. Simpson is principal investigator of SUDDEN, a population-based study of the epidemiology of all-cause, out-of-hospital, sudden unexpected death (OHSUD) in adults under age 65. His other areas of research interest include the management of hypercholesterolemia, hypertension, and cardiovascular disease, and he has lectured nationally and internationally on these topics. His work is widely published, and he serves as a reviewer for numerous medical publications.