Dr. Grace Pien is an assistant professor of medicine at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include pulmonary diseases, critical care medicine, sleep, sleep apnea and sleep disorders. Dr. Pien received her M.D. from the Columbia University College of Physicians and Surgeons and completed her residency in internal medicine at the Boston University School of Medicine. She performed a fellowship in pulmonary and critical care medicine and a fellowship in sleep medicine at the Hospital of the University of Pennsylvania.