When issues arise within your digestive system, from the esophagus down to the rectum, the medical specialist you need is a gastroenterologist. These highly specialized professionals are often referred to as a gastro doctor or a gastroenterology doctor, and they are experts in the intricate and vital field of gastroenterology. This branch of medicine is dedicated to the study, diagnosis, and treatment of disorders affecting the entire gastrointestinal (GI) tract and associated organs like the li