Dr. Nathan is the Medical Director of Inova’s Advanced Lung Disease Program and Lung Transplant Program, a position he has held since 1996. He is also a Professor of Medical Education at the University of Virginia, a position he has held since 2020.

Dr. Nathan is board certified in pulmonary diseases, critical care medicine and internal medicine. As the author of more than 500 publications, Dr. Nathan is internationally recognized for his expertise in advanced lung diseases. He is co-editor of two books on idiopathic pulmonary fibrosis, or IPF, that provide pulmonologists and other healthcare workers with an up-to-date review of the background and advances in the field: Idiopathic Pulmonary Fibrosis and Guide to Clinical Management of Idiopathic Pulmonary Fibrosis. Dr. Nathan is a reviewer for multiple journals and is on the editorial board for the journal, Thorax. He has served on multiple committees, including FDA advisory boards, as well as steering committees for clinical trials in IPF and PH. 

Dr. Nathan is a member of several professional medical associations, including the American Thoracic Society, the American College of Chest Physicians, and the International Society for Heart and Lung Transplantation. Dr. Nathan received an M.B.B.cH. from the University of Witwatersrand Medical School.