Dr. Stephen A. Harrison, FACP, FAASLD is the medical director of Pinnacle Clinical Research. He is board certified in internal medicine and gastroenterology.
Dr. Harrison is a visiting professor of hepatology at the Radcliffe Department of Medicine at the University of Oxford. Previously, he was a professor of medicine at the Uniformed Services University of the Health Sciences.
He served in the United States Army for over 20 years, retiring in 2016 with the rank of Colonel. While serving, Harrison served as the director of Graduate Medical Education at Brooke Army Medical Center, associate dean for the San Antonio Uniformed Services Health Education Consortium, and was a gastroenterology consultant to the Army Surgeon General.
He was an associate editor of Hepatology and now is an associate editor of Alimentary Pharmacology and Therapeutics. He is a peer reviewer for over 20 medical journals and is known internationally for studies in hepatitis C and non-alcoholic fatty liver disease.