DepartmentsGastroenterology and HepatologyLocationJacksonville, FloridaLanguagesEnglishSpanishExisting patientsSend a secure message via patient portal Biographical summaryJohanna L. Chan, M.D., is a Senior Associate Consultant in the Division of Gastroenterology and Hepatology at the Mayo Clinic in Jacksonville, Florida. Prior to joining the Mayo Clinic in 2021, she was Assistant Professor of Medicine at Baylor College of Medicine in Houston, Texas, where she served as Associate Clinical Medical Director for the faculty group practice at Baylor Medicine Gastroenterology and Baylor St. Luke's Medical Center. Dr. Chan cares for patients with a variety of general gastrointestinal conditions, with a particular clinical focus on colon cancer screening, women's health, nutrition, and dietary management of GI disorders and symptoms. Conditions treatedColon polypsConstipationDiarrheaGastroesophageal reflux diseaseGastrointestinal bleedingPeptic ulcer Procedures performedColonoscopyFlexible sigmoidoscopyUpper endoscopy Mayo Clinic locations Jacksonville, Florida Driving Directions More info Billing & insurance Accessibility services Education2015Fellowship - GastroenterologyBaylor College of Medicine2012Residency - Internal MedicineDuke University Medical Center2009MD - Medical DoctorUniversity of Texas, Southwestern Medical School2005BA - Concentration: Molecular BiologyPrinceton UniversityShow more education Activities and honorsCertifications2015GastroenterologyAmerican Board of Internal MedicineProfessional memberships2023 - presentEndoscopy ChairDepartment of Gastroenterology2023 - presentEquipment CommitteeMayo Clinic in Florida2023 - presentPractice Committee MemberMayo Clinic in Florida2023 - presentPractice Committee MemberMayo Clinic in Florida2023 - presentChairGIH Endoscopy Committee, Department Committees, Department of Nursing2023 - presentCommittee MemberGIH Executive Committee, Department of Gastroenterology and Hepatology2023 - presentSpecialty Committee RepresentativeDepartment of Gastroenterology and Hepatology2022 - presentProgram Committee MemberDepartment of Gastroenterology2022 - presentFellowship interview committeeDepartment of Gastroenterology2022 - presentClinical Competency Committee - MemberDepartment of Gastroenterology2022 - presentPhysician LeadDepartment of GastroenterologyShow more professional membershipsPublicationsSee my publications Biographical summaryConditions treatedProcedures performedMayo Clinic locationsEducationActivities and honors Request an appointment PST-20521673 Doctors & Medical Staff Chan, Johanna L. M.D.