Gastric bypass, also called Roux-en-Y gastric bypass, shrinks stomach size and re-routes your digestive system so you don’t absorb as much food (procedure available in Pittsburgh and Wilkes-Barre only). 
Sleeve gastrectomy removes part of your stomach, leaving only a slender “sleeve”. Bariatric surgery can be done in several ways: Bariatric surgery, also called weight loss surgery, reduces the size of your stomach and length of your small intestine to limit the amount of food that can be eaten or absorbed.