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 Find a doctor 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 Aug. 27, 2020 Print Share on: FacebookTwitter Show references Greenwald DA, et al. Overview of upper gastrointestinal endoscopy (esophagogastroduodenoscopy). https://www.uptodate.com/contents/search. Accessed Aug. 21, 2020. Understanding upper endoscopy. American Society for Gastrointestinal Endoscopy. https://www.asge.org/home/for-patients/patient-information/understanding-upper-endoscopy. Accessed Aug. 21, 2020. Feldman M, et al. Preparation for and complications of gastrointestinal endoscopy. In: Sleisenger & Fordtran's Gastrointestinal and Liver Disease: Pathophysiology, Diagnosis, Management. 11th ed. Philadelphia, Pa.: Elsevier; 2021. http://www.clinicalkey.com. Accessed Aug. 21, 2020. Goldman L, et al., eds. Gastrointestinal endoscopy. In: Goldman-Cecil Medicine. 26th ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed Aug. 21, 2020. Endoscopy. The Merck Manual Professional Edition. https://www.merckmanuals.com/professional/gastrointestinal-disorders/diagnostic-and-therapeutic-gastrointestinal-procedures/endoscopy. Accessed Aug. 21, 2020. 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 Aug. 21, 2020. Picco MF (expert opinion). Mayo Clinic, Rochester, Minn. April 21, 2015. 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 Median arcuate ligament syndrome (MALS) 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 2020-2021 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