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Steven W. Ressler, M.D.

  1. Internist

Specialty Groups


  1. Phoenix, Arizona



Dr. Ressler is an Internist in the division of General Internal Medicine who joined Mayo Clinic in 2002. Prior to coming to Mayo Clinic, he practiced in a rural setting at Payson Regional Medical Center, where he cared for Internal Medicine and Pediatric patients as an outpatient clinician, Hospitalist also serving as co-director of Adult Critical Care.

Dr. Ressler earned an undergraduate degree at the University of Michigan and M.D. at Michigan State University, College of Human Medicine. He completed a combined Internal Medicine and Pediatrics residency at Good Samaritan Regional Medical Center (Banner) and Phoenix Children's Hospital.

Since joining Mayo Clinic, Dr. Ressler has cared for patients in Consultative Medicine, Executive Health, and International Medicine, also rotating on Hospitalist services for several years. He is chair of the Division of General Internal Medicine and Physician Ambassador to Canada for Mayo Clinic International. He also is the principal investigator for the Undiagnosed Mass Clinic and research program, which expedites diagnostic care for patients with a newly discovered mass.

Dr. Ressler is originally from Ann Arbor, Michigan. He and his family love the Arizona desert and its endless opportunities for camping and hiking. They are also avid skiers and flock north at every opportunity.

  • Newly discovered masses or growths that are concerning for cancer
  • Complex or undiagnosed conditions
  • State of the art preventive health services for working executives in the Executive Health program
  • Care for international patients
  1. 1998
    Resident - Internal MedicinePhoenix Children's Hospital
  2. 1994
    MDCollege of Human Medicine, Michigan State University
  3. 1989
    BS - BiologyCollege of Literature, Science, and the Arts, University of Michigan
  4. 1988
    Undergraduate StudiesHistory and Arts Summer Study Abroad Program to Italy, Greece, Turkey, Israel and Egypt, Eastern Michigan University


  1. 1998
    Internal MedicineAmerican Board of Internal Medicine

Awards and honors

  1. 2021
    2021 Top DoctorsPhoenix Magazine
  2. 2020
    2020 Top Performing Provider in ExperienceOffice of Mayo Clinic Experience, Mayo Clinic Arizona
  3. 2017
    Medical Technology Accelerator Award: My Healthy Future ProjectArizona State University
  4. 2016
    Physician of the DayArizona State Legislature
  5. 2012
    CPD Annual Award Recognition for CMED LEAN PilotMayo School of Continuous Development, Department of Education Administration
  6. 2011
    PRC 5-Star Award for Patient SatisfactionDivision of Consultative Medicine, Department of Internal Medicine
  7. 2007
    Leadership Day ScholarshipArizona State Chapter, American College of Physicians
  8. 2003
    Excellence in Teaching Recognition HonorMayo Clinic College of Medicine and Science, Department of Education Administration

Professional memberships

  1. 2017
    Co-HostQuality Academy Overview and Training, Doctors of British Columbia, Canada, Mayo Clinic Care Network
  2. 2017 - present
    Physician LeadCanada Regional Development Group, Mayo Clinic International
  3. 2016 - 2019
    Development and ImplementationCVPFH Electronic Health Questionnaire MCA, Mayo Clinic in Arizona
  4. 2015 - 2018
    Co-ChairCoordinating Group for Roll-Out in Arizona, Plummer Project, Mayo Clinic Enterprise
  5. 2015 - 2018
    Physician LeadContent Building Group, Plummer Project, Mayo Clinic Enterprise
  6. 2015 - 2018
    MemberPhysician Advisory Group, Plummer Project, Mayo Clinic Enterprise
  7. 2015 - 2018
    MemberSteering Group, Plummer Project, Mayo Clinic Enterprise
  8. 2012 - present
    MemberOutpatient Practice Redesign Working Group, Department of Internal Medicine
  9. 2012
    MemberPaper Orders Reduction Task Force, Mayo Clinic Arizona Task Forces
  10. 2011
    MemberCollaboration and Communication Working Group, Department of Research
  11. 2011
    Co-LeaderLEAN Project, Division of Consultative Medicine, Department of Internal Medicine
  12. 2010 - 2013
    Co-ChairDivision of Consultative Medicine, Department of Internal Medicine
  13. 2010 - 2011
    MemberMultidisciplinary Concussion Team
  14. 2009 - 2011
    MemberResuscitation Subcommittee, Clinical Practice Committee - Arizona, Executive Operations Team - Arizona
  15. 2009
    Physician AmbassadorMayo Clinic in Arizona
  16. 2008 - 2009
    MemberDepartment of Internal Medicine Medication Reconciliation Working Group, Clinical Practice Committee - Arizona, Executive Operations Team - Arizona
  17. 2007 - 2009
    Co-DeveloperHeart Health & Performance Program
  18. 2004
    Physician AmbassadorMayo Clinic in Arizona
  19. 2003 - 2004
    MemberSecurity Subcommittee
  20. 1994
    InducteeAlpha Omega Alpha Honor Medical Society