Gastroenterologists are trained in diseases and conditions of the digestive tract and liver. Major areas of treatment include the esophagus, stomach, pancreas, gallbladder, bile ducts, liver, small and large intestines, and rectum.

Gastroenterology involves the study of the transit of materials through the stomach and intestines, the digestion of food and absorption into the body, and the removal of waste materials.

Gastroenterologists are the specialists of choice for many common conditions (like GERD and irritable bowel syndrome) as well as many serious illnesses such as esophageal and colon cancer.