 Rosand was born in New York, New York, to art historian David Rosand and musicologist Ellen Rosand.Rosand earned his bachelor of arts in Greek and Latin from Columbia University and his MD from the Columbia University College of Physicians and Surgeons.He completed his residency training at MGH, serving as Chief Resident in Neurology, followed by a fellowship in vascular neurology and neurocritical care, also at MGH.