Evanson 

Gastroenterologist: The medical specialty devoted to the study, diagnosis and treatment of disorders of the digestive system. These disorders may affect the esophagus (swallowing tube), stomach, small intestine, large intestine (colon), rectum, liver, gallbladder, or pancreas.

Gastroenterology is popularly (and incorrectly) known as "GI" (which stands for gastrointestinal).

Gastroenterologists diagnose, treat, and care for people with a range of gut-related illnesses. These include long-term conditions, such as inflammatory bowel disease (IBD) and celiac disease.