DepartmentsRadiation OncologyMayo Clinic Comprehensive Cancer CenterSpecialty GroupsNuclear Medicine TherapyEarly Onset and Hereditary GI Cancers ProgramLocationPhoenix, ArizonaLanguagesEnglishSpanishExisting patientsSend a secure message via patient portal Conditions treatedAnal cancerCholangiocarcinomaColon cancerEsophageal cancerLeukemiaLiver cancerLymphomaMultiple myelomaNeuroendocrine tumorPancreatic cancerPancreatic neuroendocrine tumorRectal cancerSmall bowel cancerStomach cancer Procedures performedIntensity-modulated radiation therapyIntraoperative radiation therapyProton therapyRadiation therapyStereotactic body radiotherapy InterestsMultidisciplinary management of gastrointestinal malignancies (esophagus, stomach, liver, bile duct, pancreas, colon, rectal, anus)Multidisciplinary management of hematologic malignancies (lymphoma, leukemia, multiple myeloma) Proton beam therapyStereotactic Body Radiation Therapy (SBRT)Intraoperative Radiation Therapy (IORT)Total Skin Electron Beam Therapy (TSEBT)Specialized radiation techniques including intensity modulated radiotherapy, stereotactic body radiosurgery/radiotherapy, proton beam therapy, electron beam therapy, total skin electron beam therapy, and intraoperative radiation therapy. Mayo Clinic locations Phoenix, Arizona Driving Directions More info Billing & insurance Accessibility services Education2011Chief Resident - Radiation OncologyUniversity of Texas Southwestern Medical Center2010Fellow - BrachytherapyAmerican Brachytherapy Society2007Internship - MedicineUniversity of California, San Francisco2006MDOregon Health and Science University Medical School2000BS - Biological SciencesUniversity of California, DavisShow more education Activities and honorsCertifications2012Radiation OncologyAmerican Board of RadiologyAwards and honors2010Young Investigator AwardAmerican Society of Clinical Oncology2009Resident Travel AwardAmerican College of Radiation Oncology2006Medical Student in Radiation Medicine AwardOregon Health and Science University2006Multicultural Recognition and Service AwardOregon Health and Science University2004Campbell ScholarshipOregon Health and Science University2004Scholarship and Membership AwardPortland Hispanic Metropolitan Chamber2003Campbell ScholarshipOregon Health and Science University2003Scholarship and Membership AwardPortland Hispanic Metropolitan Chamber2002C. Melley ScholarshipOregon Health and Science University2000AwardGolden Key International Honour Society2000AwardOrder of Omega Greek Honor Society1996Regents and Vice Chancellor ScholarshipsUniversity of CaliforniaShow more awards and honorsProfessional memberships2019 - presentLeaderDepartmental Diversity, Department of Radiation Oncology2019 - presentMemberCollaborative Committee, Practice Parameter for Lutetium-177 DOTATATE Therapy, ACR-ACNM-ASTRO-SNMMI2017 - presentDirectorMedical Student Clerkship, Department of Radiation Oncology2017 - presentMemberQuality Assurance Committee, Department of Radiation Oncology2014 - presentMemberEducation Committee, Department of Radiation Oncology2014 - presentMemberResidency Clinical Competency Committee, Department of Radiation Oncology2009MemberAmerican Society of Clinical Oncology2007MemberAmerican Society for Radiation Oncology2003FacilitatorHealing Racism Institute (Medical School Course), Oregon Health and Science University Medical School2003 - 2006MemberRecruitment Program, Oregon Health and Science University Medical School2003 - 2006Vice PresidentOregon Chapter, Student National Medical Association2003MemberStudent National Medical Association2003Co-FounderOregon Chapter, Student National Medical Association MemberStudent National Medical Association, Oregon Health and Science University Medical School VolunteerUnder Represented Minority (URM), Student National Medical Association, Oregon Health and Science University Medical School RepresentativeStanford University Minority Medical Alliance Conference, Student National Medical Association, Oregon Health and Science University Medical SchoolShow more professional membershipsPublicationsSee my publications Conditions treatedProcedures performedInterestsMayo Clinic locationsEducationActivities and honors Request an appointment PST-20226563 Doctors & Medical Staff Rule, William G. M.D.