Douglas M. Dahl, MD FACS is a Urologic Surgeon at the Massachusetts General Hospital in Boston, Massachusetts. He is the Chief of Urologic Oncology. He is an Associate Professor of Urology at Harvard Medical School. His expertise is in laparoscopic and robotic surgery for prostate cancer, kidney cancer, and reconstruction of the urinary tract. He is an expert in rare malignancies of the genito-urinary organs.