Book AppointmentPeter J. Stahl, MD is the Director of Male Reproductive and Sexual Medicine at NewYork-Presbyterian Hospital/Columbia University Medical Center and Assistant Professor of Urology at the Columbia University College of Physicians and Surgeons. He completed his undergraduate studies at Cornell University, where he played competitive tennis. Dr. Stahl subsequently attended medical school and completed his urology residency at NewYork Presbyterian-Hospital/Weill Cornell Medical College in New York City.