Gastroenterology is the medical specialty concerned with the diagnosis and treatment of diseases of the gastrointestinal system, which includes the esophagus, stomach, small intestine, colon, rectum, liver, gallbladder, pancreas, and biliary tract. Location Services Hepatology at Brighton Health Center8001 Challis Rd. Brighton, MI 48116 Toll-free 844-233-0433 Gastroenterology & Hepatology at East Ann Arbor Health and Geriatrics Center4260 Plymouth Rd. Ann Arbor, MI 48109 Hepatology at Canton Health Center1051 N. Canton Center Rd. Canton, MI 48187 Toll-free 844-233-0433 Gastroenterology at Northville Health Center39901 Traditions Drive Northville, MI 48168 888-229-7408 Gastroenterology and Hepatology at Taubman Center 1500 E. Medical Center Drive Floor 3, Reception D Ann Arbor, MI 48109 888-229-7408