(Stomach, Digestive System, Intestine)

for achalasia, robotic surgery, and more. He has been involved in minimal access surgery both in the US and internationally in nearly all continents, as a surgeon-in-training, a practicing surgeon and also as teacher of other expert surgeons. Dr. Rivas is a Fellow of the American College of Surgeons. Also, he is a member of multiple surgical societies including the Society of American Gastrointestinal and Endoscopic Surgeons, the American Society of Metabolic and Bariatric Surgery, the European Association for Endoscopic Surgery, the Society of Surgery for the Alimentary Tract, the American Society for Gastrointestinal Endoscopy, among others. He has also been inducted as Honorary Fellow for both, the Brazilian College of Surgeons and the Brazilian College of Digestive Surgery.