Lewin, a chairman of the department of radiology and radiological science at Johns Hopkins, was born in Cleveland. He earned his A.B. in chemistry from Brown University in 1981 and his M.D. from Yale University in 1985. Lewin then completed an internship in pediatrics at Yale-New Haven Hospital in 1986, a residency in diagnostic radiology at the University Hospitals of Cleveland in 1990, a magnetic resonance research fellowship at Siemens Medical Systems in West Germany in 1990, and a fellowship at the Cleveland Clinic Foundation in 1992. After his neuroradiology fellowship, he was a visiting fellow in head and neck radiology at Pittsburgh Eye and Ear Hospital while serving as assistant staff at the Cleveland Clinic. In 1993, Lewin returned to the University Hospitals of Cleveland as the director of magnetic resonance imaging (MRI) and assistant professor of radiology at Case Western Reserve University. He became vice chair for research and academic affairs in 1997, and attained tenure in 1999. Lewin held additional appointments in the departments of oncology, neurological surgery, and biomedical engineering.
In 2004, Lewin was named the Martin W. Donner Professor and Director of the Russell H. Morgan Department of Radiology and Radiological Sciences at the Johns Hopkins University School of Medicine and radiologist-in-chief at The Johns Hopkins Hospital. He also held appointments in the departments of oncology, neurosurgery, and biomedical engineering. In 2012, he was appointed co-chair of strategic planning and in 2013, as senior vice president for integrated health care delivery for Johns Hopkins Medicine. He held these positions until 2016 when he accepted the position as executive vice president for health affairs at Emory University, executive director for Emory's Woodruff Health Sciences Center, and president, chief executive officer, and chair of the board of directors of Emory Healthcare.Lewin is an internationally recognized pioneer in interventional and intraoperative MRI. His research interests include the science and clinical aspects of interventional MRI, functional MRI, head and neck imaging, magnetic resonance angiography, small animal imaging, and the imaging of acute stroke. Lewin has published over 250 articles, commentaries, and chapters and has served on the editorial boards or as an editor for the Journal of Magnetic Resonance Imaging, the American Journal of Neuroradiology, the Journal of the American College of Radiology, Magnetic Resonance Imaging Clinics of North America, Topics in Magnetic Resonance Imaging, and Current Protocols in Magnetic Resonance Imaging. In addition, he holds more than twenty-five patents for inventions related to MRI technology and has been principal or co-principal investigator on grants totaling more than $10 million from the National Institutes of Health and other federal and state funding agencies.
Lewin has been heavily involved in radiology professional societies and served as president of the Society of Chairs of Academic Radiology Departments, the American Roentgen Ray Society, the Association of University Radiologists, the Academy for Radiology Research, and the International Society for Strategic Studies in Radiology. In addition, he served on the executive boards of the American College of Radiology and the American Society of Neuroradiology. He has been honored as a Fellow of the International Society of Magnetic Resonance in Medicine and as a Fellow of the American College of Radiology. He has been included in Modern Healthcare's fifty most influential physicians and the Atlanta Business Chronicle's 100 most influential Atlantans. He was awarded the Radiology Research Alliance Innovation and Leadership Award as well as the Leadership Luminary Award from the Radiology Leadership Institute of the American College of Radiology.