There are multiple types of bariatric surgeries like Roux-en-Y Gastric Bypass, Revisional Surgery, Duodenal Jejunal Bypass with Sleeve Gastrectomy, Laparoscopic Adjustable Gastric Banding, Sleeve Gastrectomy, and Revisional Surgery. Doctors choose any one of the above mentioned surgery for their patients based on their medical history, body type, weight, several blood tests and exams, etc.