A gastroenterologist is a type of specialist doctor whose primary focus is the digestive system and related organs. They diagnose and treat diseases related to the gastrointestinal (GI) tract and organs, such as the stomach, intestines, esophagus, liver, pancreas, gallbladder and bile ducts.

Gastroenterologists must have a thorough understanding of the human body, medical conditions related to the gastrointestinal tract, treatment options, and preventive care. Gastroenterologists are experts in diagnosing and treating disorders of the digestive system using a variety of tests, procedures and medications.

One of the primary functions of a gastroenterologist is endoscopy. This procedure involves a doctor inserting an endoscope, a thin, flexible tube with a tiny camera on the end, into the patient's gastrointestinal tract. The gastroenterologist then views the video images produced to diagnose and determine the best course of treatment. Some other specialized diagnostic procedures they may perform include imaging studies, biopsies, and endoscopic mucosal resection.

The role of a gastroenterologist also includes helping patients to make lifestyle changes that can help to improve their digestive system health. They may recommend changes to a patient's diet and exercise habits to help manage symptoms and promote overall well being. Dietary guidance may involve sticking to a specific diet to manage health conditions such as irritable bowel syndrome or Crohn's disease.

Gastroenterologists are experienced in performing a variety of surgical procedures. These surgeries may involve removing tumors, treating hernias, and restoring blocked bowel passage. They also treat various other issues including gastrointestinal bleeding, inflammatory diseases, pancreatic and liver diseases, and chronic constipation.

Gastroenterologists play an important role in diagnosing and treating the many diseases that affect the digestive system. By offering their expertise in a variety of diagnostic tests and treatments, they can help improve their patients’ quality of life.