Digestive system surgery or gastrointestinal surgery (Gastro Surgery), can be divided into upper GI surgery and lower GI surgery. Upper gastrointestinal surgery (upper GI surgery, like esophagus, stomach, duodenum, and ileum) refers to a practice of surgery that focuses on the upper parts of the gastrointestinal tract.

There are many operations relevant to the upper gastrointestinal tract that are best done only by those who keep constant practice, owing to their complexity.