Doctors 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. Find doctors and medical staff: edit search filters Close Narrow your search Doctor's Name, Condition Or Procedure By location Phoenix/Scottsdale, AZ 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 Find a doctor whose last name begins with the letter D D Find a doctor 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 active 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 Find a doctor whose last name begins with the letter M M Find a doctor whose last name begins with the letter N N Find a doctor 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 Find a doctor whose last name begins with the letter U U Find a doctor 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 Find a doctor whose last name begins with the letter Y Y There are no doctors whose last name begins with the letter Z Z By conditions treated No results found By procedures performed No results found By spoken language No results found Reset all filters Displaying 1-3 out of 3 doctors available Last Name Initial: J Channa R. Jayasekera, M.D. Gastroenterologist Gastroenterologist (Transplant Hepatologist) Phoenix, AZ Areas of focus: Liver transplant, Colonoscopy, Liver problems, Liver cancer, Nonalcoholic fatty liver disease, Hepatocellular carcinoma Amanda M. Johnson, M.D. Gastroenterologist Rochester, MN Areas of focus: Colonoscopy, Upper endoscopy, Gastrointestinal disorder, Inflammatory bowel disease Richard B. Jonas, M.D. Gastroenterologist Phoenix, AZ Areas of focus: Colonoscopy, Esophageal dilatation, Upper endoscopy Request an Appointment at Mayo Clinic Conditions treatedDoctors by location and specialty July 22, 2021 Share on: FacebookTwitter Mayo Clinic in Rochester, Minn., has been recognized as the best Gastroenterology & GI Surgery hospital in the nation for 2021-2022 by U.S. News & World Report. Learn more about this top honor Gastroenterology and HepatologyDepartment homeSectionsRequest an appointmentOverviewTests & proceduresConditions treatedDoctorsDoctors by location and specialtySpecialty groupsExpertise & rankingsLocations, travel & lodgingClinical trialsResearchThe Mayo Clinic experience & patient storiesCosts & insuranceNews from Mayo ClinicResources for medical professionals SectionsRequest an appointmentOverviewTests & proceduresConditions treatedDoctorsDoctors by location and specialtySpecialty groupsExpertise & rankingsLocations, travel & lodgingClinical trialsResearchThe Mayo Clinic experience & patient storiesCosts & insuranceNews from Mayo ClinicResources for medical professionals ORG-20308333 Departments & Centers Medical Departments & Centers Gastroenterology and Hepatology