Dr. Arnaout is a physician-scientist in the Department of Medicine at Massachusetts General Hospital in Boston. He is Chief-Emeritus of the Division of Nephrology at Massachusetts General Hospital, and Professor of Medicine at Harvard Medical School.
Dr. Arnaout received his medical degree with distinction from the American University of Beirut, Lebanon. He served on the medical staff of the American University of Beirut Hospital as an intern and resident in Medicine before moving to Johns Hopkins where he completed his residency. He then moved to Harvard where he finished fellowships in immunology and nephrology at Boston's Childrens Hospital and Brigham and Women's Hospital.
Dr. Arnaout is a physician-scientist and served as Chief of the Division of Nephrology at Massachusetts General Hospital from 1998-2013. He received many awards including the 2018 Homer W Smith Award from the American Society fo Nephrology presented annually to an individual "who has made outstanding contributions which fundamentally affect the science of nephrology". He currently serves as a practicing physician, Principal Investigator on several Federal grants and Director of the Leukocyte Biology & Inflammation Program and the Structural Biology Program in the Department of Medicine and Nephrology at Massachusetts General Hospital.