Print Departments and specialties Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Departments with related expertise Critical Care Gastroenterology and Hepatology Doctors who perform this procedure edit search filters Close Narrow your search By location Rochester, MN By last name Find a doctor whose last name begins with the letter A A Find a doctor whose last name begins with the letter B B Find a doctor whose last name begins with the letter C C There are no doctors whose last name begins with the letter D D There are no doctors whose last name begins with the letter E E Find a doctor whose last name begins with the letter F F Find a doctor whose last name begins with the letter G G Find a doctor whose last name begins with the letter H H Find a doctor whose last name begins with the letter I I Find a doctor whose last name begins with the letter J J There are no doctors whose last name begins with the letter K K Find a doctor whose last name begins with the letter L L active Find a doctor whose last name begins with the letter M M Find a doctor whose last name begins with the letter N N There are no doctors whose last name begins with the letter O O Find a doctor whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q Find a doctor whose last name begins with the letter R R Find a doctor whose last name begins with the letter S S Find a doctor whose last name begins with the letter T T There are no doctors whose last name begins with the letter U U There are no doctors whose last name begins with the letter V V Find a doctor whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X There are no doctors whose last name begins with the letter Y Y Find a doctor whose last name begins with the letter Z Z Reset all filters Displaying 1-1 out of 1 doctors available Last Name Initial: M Thomas F. Mangan, M.D. Internist Gastroenterologist Rochester, MN Areas of focus: Upper endoscopy By Mayo Clinic Staff Request an Appointment at Mayo Clinic About Sept. 29, 2018 Print Share on: FacebookTwitter Show references Pfenninger JL, et al., eds. Esophagogastroduodenoscopy. In: Pfenninger and Fowler's Procedures for Primary Care. 3rd ed. Philadelphia, Pa.: Mosby Elsevier; 2011. https://www.clinicalkey.com. Accessed Sept. 7, 2018. Hines RL, et al., eds. Diseases of the gastrointestinal system. In: Stoelting's Anesthesia and Co-Existing Disease. 7th ed. Philadelphia, Pa.: Elsevier; 2018. https://www.clinicalkey.com. Accessed Sept. 7, 2018. Upper GI endoscopy. National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/diagnostic-tests/upper-gi-endoscopy. Accessed Sept. 7, 2018. Cohen J, et al. Overview of upper gastrointestinal endoscopy (esophagogastroduodenoscopy). https://www.uptodate.com/contents/search. Accessed Sept. 7, 2018. Early DS, et al. Guidelines for sedation and anesthesia in GI endoscopy. Gastrointestinal Endoscopy. 2018;87:327. Picco MF (expert opinion). Mayo Clinic, Jacksonville, Fla. Sept. 17, 2018. Related Anthrax Bile reflux Blastocystis hominis Burns Carcinoid tumors Chagas disease Chronic sinusitis Cyclic vomiting syndrome Dysphagia Endoscopy Endoscopy Esophageal cancer Esophageal spasms Esophagitis Functional dyspepsia Gastritis Gastroesophageal reflux disease (GERD) Gastrointestinal tract Heartburn Helicobacter pylori (H. pylori) infection Hiatal hernia Indigestion Intestinal ischemia Iron deficiency anemia Nonallergic rhinitis Oral thrush Peptic ulcer Sinus headaches Stomach cancer Stomach polyps Vocal cord paralysis Show more related content Products & Services Book: Mayo Clinic Family Health Book, 5th Edition Newsletter: Mayo Clinic Health Letter — Digital Edition Show more products and services from Mayo Clinic Mayo Clinic in Rochester, Minn., has been recognized as the best Gastroenterology & GI Surgery hospital in the nation for 2019-2020 by U.S. News & World Report. Learn more about this top honor Upper endoscopyAboutDoctors & Departments PRC-20395182 Patient Care & Health Information Tests & Procedures Upper endoscopy