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 that treat this condition Colon and Rectal Surgery Gastroenterology and Hepatology Gastrointestinal Neoplasia Clinic Pediatric Surgery Doctors who treat this condition edit search filters Close Narrow your search By location Jacksonville, FL By last name There are no doctors 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 There are no doctors whose last name begins with the letter E E There are no doctors whose last name begins with the letter F F There are no doctors whose last name begins with the letter G G There are no doctors whose last name begins with the letter H H Find a doctor whose last name begins with the letter I I There are no doctors 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 There are no doctors 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 active Find a doctor whose last name begins with the letter R R Find a doctor whose last name begins with the letter S S There are no doctors 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 There are no doctors 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 There are no doctors whose last name begins with the letter Z Z Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-1 out of 1 doctors available Last Name Initial: R Douglas L. Riegert-Johnson, M.D. Gastroenterologist Internist Medical Geneticist Jacksonville, FL Areas of focus: Upper endoscopy, Colonoscopy, Fecal transplant, Chromoendoscopy, Lynch syndrome, Familial adenomatous polyposis, Pancre...atic cancer Show more areas of focus for Douglas L. Riegert-Johnson, M.D. ResearchMayo Clinic researchers are continually developing improved screening methods and treatments for hereditary polyp disorders, such as FAP, and colorectal cancer. Mayo maintains a Colon Cancer Family Registry to help keep you informed of new screening techniques and procedures. Mayo scientists are working to discover more about the genetic basis of FAP and other hereditary polyp disorders and to clinically translate those genetic findings to medical care. Surgeons also are working to improve treatments, such as laparoscopic techniques for colorectal procedures. PublicationsSee a list of publications about familial adenomatous polyposis by Mayo Clinic doctors on PubMed, a service of the National Library of Medicine. Research Profiles Narrow your search By location Arizona Florida Minnesota View all View all physicians • Minnesota Boardman, Lisa A. M.D. Minnesota Chua, Heidi K. M.D. Minnesota Cima, Robert R. M.D. Minnesota Dozois, Eric J. M.D. Minnesota By Mayo Clinic Staff Familial adenomatous polyposis care at Mayo Clinic Request an appointment Diagnosis & treatmentCare at Mayo Clinic June 30, 2021 Print Share on: FacebookTwitter Living with familial adenomatous polyposis? Connect with others like you for support and answers to your questions in the Colorectal Cancer support group on Mayo Clinic Connect, a patient community. Colorectal Cancer Discussions Don’t want to lose anus 37 Replies Mon, Mar 20, 2023 chevron-right Anyone have a positive Cologuard test? 52 Replies Sun, Mar 19, 2023 chevron-right How long was the time between diagnosis to surgery for you? 26 Replies Fri, Mar 17, 2023 chevron-right See more discussions Related Associated Procedures Ileoanal anastomosis (J-pouch) surgery 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 Familial adenomatous polyposisSymptoms & causesDiagnosis & treatmentDoctors & departmentsCare at Mayo Clinic Research: It's All About Patients CON-20372433 Patient Care & Health Information Diseases & Conditions Familial adenomatous polyposis