DepartmentsRadiation OncologySpecialty GroupsHead and Neck Cancer CenterLung Cancer ProgramLocationJacksonville, FloridaLanguagesEnglishExisting patientsSend a secure message via patient portal Share this page via: Facebook Twitter Print Email a friend Conditions treatedHead and neck cancerLung cancerLymphoma Procedures performedIGRTIMRTStereotactic body radiotherapy InterestsGastrointestinal cancersHead and neck cancersLung cancersLymphomasImage-guided radiation therapy, including IMRT, respiratory-gated radiation therapy and stereotactic body radiotherapy. Mayo Clinic locations Jacksonville, Florida Driving Directions More info Billing & insurance Accessibility services Education1999MDUniversity of Texas Health Science Center at San Antonio Activities and honorsCertifications2005Radiation OncologyAmerican Board of RadiologyProfessional memberships2020MemberAmerican Board of Radiology2020MemberAmerican Society for Radiation Oncology2002 - presentActive MemberAmerican Society for Therapeutic Radiology and OncologyShow more professional membershipsPublicationsSee my publications Conditions treatedProcedures performedInterestsMayo Clinic locationsEducationActivities and honors Request an appointment PST-20223952 Doctors & Medical Staff Ko, Stephen J. M.D.