Dr. Greenstein earned her MD degree at the University of Pennsylvania School of Medicine. Her internship in Internal Medicine was completed at the Mount Sinai Hospital in New York, NY followed by a Diagnostic Radiology residency and Nuclear Medicine fellowship at New York Presbyterian Hospital and Columbia University Medical Center, Dr. Greenstein is dual board certified in Nuclear Medicine and Diagnostic Radiology. She is a member of the Radiologic Society of North America and the Society of Nuclear Medicine and Molecular Imaging.