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Douglas L. Riegert-Johnson, M.D.

  1. Gastroenterologist
  2. Internist
  3. Medical Geneticist
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Departments

Location

  1. Jacksonville, Florida

Languages

English

Existing patients

Dr. Riegert-Johnson trained in medicine at Mayo Clinic Rochester. After his general medical training, he was the Chief Medical Resident. He then trained in Clinical Genetics at Johns Hopkins Hospital. After training in Baltimore, he returned to Mayo Clinic Rochester and completed a Gastroenterology fellowship. He is board certified in both Gastroenterology and Clinical Genetics and Genomics and has been on staff at Mayo Clinic Florida since 2018.

Dr. Riegert-Johnson's clinical practice, procedural expertise and research interests are focused on conditions which increase the risk of cancer. These include Lynch syndrome, familial adenomatous polyposis (FAP), familial pancreatic cancer and other conditions. His clinic offers genetic counseling and genetic testing to interested patients. He performs both upper endoscopy and colonoscopy, focusing on very detailed examinations for high risk patients. He has published more than 90 scientific publications, book chapters and abstracts and is actively involved in professional societies including the Collaborative Group of the Americas on Inherited Colorectal Cancer (CGA-ICC).

  1. Familial adenomatous polyposis
  2. Lynch syndrome
  3. Pancreatic cancer
  1. Chromoendoscopy
  2. Colonoscopy
  3. Fecal transplant
  4. Upper endoscopy
  • Familial cancer syndromes
  1. 2008
    Fellow - Gastroenterology, Satter Family GI Cancer Research FellowMayo Graduate School of Medicine
  2. 2008
    ResidentGastroenterology, Programs in Rochester, Mayo School of Graduate Medical Education, Mayo Clinic College of Medicine
  3. 2005
    Resident - Genetic Medicine and Fellow of Pediatrics, Margaret Ellen Nielsen Fellow of Genetic MedicineThe Johns Hopkins Hospital
  4. 2003
    Chief Medical ResidentMayo School of Graduate Medical Education, Mayo Clinic College of Medicine
  5. 2003
    ResidentChief Medical Resident, Programs in Rochester, Mayo School of Graduate Medical Education, Mayo Clinic College of Medicine
  6. 2002
    Resident - Internal MedicineMayo Graduate School of Medicine, Mayo Clinic College of Medicine
  7. 2002
    ResidentInternal Medicine, Programs in Rochester, Mayo School of Graduate Medical Education, Mayo Clinic College of Medicine
  8. 1999
    MDUniversity of Alabama School of Medicine
  9. 1995
    BS - ChemistrySamford University

Certifications

  1. 2008
    GastroenterologyAmerican Board of Internal Medicine
  2. 2005
    Clinical GeneticsAmerican Board of Medical Genetics and Genomics
  3. 2002
    Internal MedicineAmerican Board of Internal Medicine

Awards and honors

  1. 2014
    Resident GI Teacher of the YearInternal Medicine, Mayo Clinic in Florida
  2. 2010
    C. Douglas Fleming GI Teacher of the YearDepartment of Internal Medicine, Division of Gastroenterology & Hepatology, Mayo Clinic in Florida
  3. 2008
    Gastroenterology board examination – top 10 %Satter Family Cancer Research Fellowship, Mayo Clinic College of Medicine, Department of Education Administration
  4. 2005
    MG ResidencyMargaret Ellen Nielsen Genetic Medicine Fellowship
  5. 1999
    Sparks Award for Excellence in Clinical Medicine ClerkshipUniversity of Alabama School of Medicine
  6. 1995
    Magna cum laude - awarded membership in National Institute of ChemistSamford University

Professional memberships

  1. 2023 - present
    MemberMembership Committee, Collaborative Group of Americans for Inherited Colorectal Cancer
  2. 2022 - present
    MemberColorectal Cancer Disease Group
  3. 2021 - present
    MemberEMS Subcommittee, Mayo Clinic
  4. 2016 - 2020
    MemberMembership Committee, American College of Medical Genetics
  5. 2012 - 2017
    MemberEndoscopy Committee, Division of Gastroenterology & Hepatology, Department of Internal Medicine
  6. 2008 - present
    MemberAmerican College of Medical Genetics and Genomics
  7. 2008 - present
    Subcommittee MemberMayo Clinic Biobank Access Committee
  8. 2008 - present
    MemberInternational Society for Gastrointestinal Hereditary Tumours
  9. 2008 - present
    MemberCollaborative Group of the Americas on Inherited Colorectal Cancer
  10. 1997 - present
    MemberAmerican Medical Association
  11.  
    Medical Genetics Research Committee, Department of Medical Genetics

Publications