John B. Marshall, MD

Gastroenterologist

Dr. John B. Marshall is a Gastroenterologist in Columbia, MO with special training and skill in preventing, diagnosing and treating conditions of the tongue, salivary glands, esophagus, stomach, intestines, anus, pancreas, gallbladder, liver, and bile ducts. As a Gastroenterologist, John B. Marshall, MD performs diagnostics and treatments to identify and address digestive system dysfunctions. Gastroenterology is a medical specialty focused on digestive (gastrointestinal) tract care. Significant diseases and conditions treated by Gastroenterologists include acid reflux, hepatitis C, hemorrhoids, irritable bowel syndrome, Crohn's disease, pancreatitis, jaundice, colon polyps, and colon cancer. Medical tests, procedures and therapies provided by Gastroenterologists include endoscopic ultrasounds, colonoscopies, sigmoidoscopies, liver biopsies, esophagus and intestine dialation, surgical hemostasis, and cancer tumor extraction.

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.