Medical Services related to John Watt Wiley MD

Colonoscopy and Colon Cancer Screening

Colon cancer screening saves lives, and the board-certified gastroenterologists at the University of Michigan have performed more than 100,000 colonoscopies in the last 10 years, with U.S. News and World Report ranking our digestive disorders physicians group as the top program in the state of Michigan.


The physicians of the Michigan Bowel Control Program, part of the University of Michigan’s Division of Gastroenterology, provide patients with treatment plans for constipation.


The multidisciplinary team of the Michigan Bowel Control Program, will work with you to determine the cause of your diarrhea and provide an individualized treatment program that treats both the symptom and any underlying cause. 

Frequently Asked Questions about Colonoscopy

Frequently asked questions about colonoscopy, an examination that enables your doctor to examine the lining of your colon (large intestine), and other types of colon cancer screening tests, as well as information about where to get a colonoscopy at the University of Michigan.

Gastrointestinal Diagnostics & Procedures

The Gastroenterology Division at the University of Michigan provides specialized diagnostic and therapeutic procedures and services to diagnose and treat patients with a wide variety of gastrointestinal disorders. These services are all provided through the multidisciplinary Medical Procedures Unit, which is located in University Hospital. We perform approximately 15,000 procedures per year.

Irritable Bowel Syndrome (IBS) and Functional Bowel Disorders

Irritable bowel syndrome and functional dyspepsia are two types of functional bowel disorders, a term that describes a problem with how the stomach and bowels function or work. The University of Michigan Functional Bowel Disorders Clinic is dedicated to the comprehensive and multidisciplinary diagnosis and treatment of patients with functional bowel disorders and irritable bowel syndrome.

Liver Biopsy

A liver biopsy is a diagnostic procedure used to determine either the extent of injury in the liver or the cause of liver injury. Liver biopsies are performed by dctors from the University of Michigan, which is ranked best in the state for gastroenterology, according to U.S. News and World Report.


A sigmoidoscopy – also called a flexible sigmoidoscopy because of the flexible tube used in the procedure – is an examination of the lower 20 inches of the colon known as the sigmoid colon. Sigmoidoscopies are performed by doctors from the the University of Michigan, ranked best in the state for gastroenterology by U.S. News & World Report.

Upper Endoscopy (EGD)

Upper endoscopy, also known as an esophagogastroduodenoscopy or EGD, is an exam of the upper gastrointestinal tract, consisting of the esophagus, stomach, and duodenum, which is the first part of the small intestine. Upper endoscopies are performed by doctors at the University of Michigan, ranked best in the state for gastroenterology by U.S. News & World Report.