Dr. Gagner obtained his M.D. from the Faculté de Medecine de l’Université de Sherbrooke. He did his surgical training at McGill University in Montreal. During his residency he completed two years of a Ph.D. program on human lipolysis in sepsis at the Royal Victoria Hospital, McGill University. Dr. Gagner also completed fellowships in hepatic surgery at Hôpital Villejuif in Paris, France and pancreatico-biliary surgery at Lahey Clinic Medical Center in Burlington, Massachusetts.
Dr. Gagner is known for his contributions in the field of Minimally Invasive Surgery, in particular a number of first descriptions of surgeries. He was, until recently, Chair of the Department of Surgery at the Mount Sinai Medical Center (Miami) and Professor of Surgery at Florida International University, and is currently Professor of Surgery in Montreal.
He has over 300 published journal articles, 40 book chapters, and eight books on minimally invasive surgery. He has been visiting professor and operated in over 60 institutions in 48 countries. He has held prominent positions in more than 35 societies and organizations, and has served on the editorial boards of 12 surgical journals.
Dr. Gagner also has received a number of honorary memberships and awards throughout his career. His most recent contributions focus on innovative upper digestive tract surgery such as bariatric and endoluminal gastric procedures.