A gastroenterologist is a medical doctor who specializes in diagnosing and treating disorders of the digestive system. This includes organs such as the esophagus, stomach, intestines, liver, and pancreas. They often perform procedures like endoscopies to examine the digestive tract and can help manage conditions like irritable bowel syndrome and gastroesophageal reflux disease (GERD). Gastroenterologists typically complete several years of training after medical school, including a residency in internal medicine and a fellowship in gastroenterology. They work in various settings, including hospitals, private practices, and specialized clinics, providing care to patients with a wide range of gastrointestinal issues.