Dr. Marc Bessler is assistant professor of surgery at Columbia University College of Physicians and Surgeons, and director of the Columbia University Center for Metabolic and Weight Loss Surgery. He is also the director of the Minimal Access Surgery Center at New York-Presbyterian Hospital/Columbia University Medical Center. A fellow of the American College of Surgeons, Dr. Bessler's clinical specialties include surgical management of morbid obesity, gastroesophageal reflux disease, laparoscopic surgery of the stomach, esophagus and hernia surgery, and natural orifice surgery. His research interests focus on hormonal, oncologic, and immune responses in laparoscopy.

He earned his medical degree from New York University School of Medicine, and completed his residency in general surgery and his fellowship in surgical endoscopy at the Columbia University College of Physicians and Surgeons and the Presbyterian Hospital in New York City.