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An esophagogastroduodenoscopy (EGD) is an outpatient procedure that is used to examine your esophagus, stomach, and the first part of your small intestine (called the duodenum). An EGD is sometimes called an upper endoscopy because it is used to evaluate the condition of your upper gastrointestinal tract.
In this article. Upper endoscopy, also known as EGD, is a procedure in which a thin scope with a light and camera at its tip is used to look inside the upper digestive tract -- the esophagus, stomach, and first part of the small intestine, called the duodenum.n this article. Upper endoscopy, also known as EGD, is a procedure in which a thin scope with a light and camera at its tip is used to look inside the upper digestive tract -- the esophagus, stomach, and first part of the small intestine, called the duodenum.