Steven J. O’Day, M.D., is professor of Medical Oncology and director of Immuno-Oncology and Clinical Research at the John Wayne Cancer Institute at Providence Saint John’s Health Center. A board-certified medical oncologist, Dr. O’Day is recognized as one of the world’s preeminent melanoma specialists. He is also a leader of immune-based therapies across many cancer types.

In 1994, Dr. O’Day founded the Medical Oncology Division of The John Wayne Cancer Institute in partnership with the world-class surgical oncology faculty. In addition, he was a founding member of The Angeles Clinic and Research Institute, where he was chief of research and director of the melanoma program.

Dr. O’Day has been at the forefront of new drug development and immunotherapies for melanoma and other cancers for the last two decades. He has been a principal investigator for more than 100 clinical trials, including several large, international phase 3 studies. He lectures extensively, both nationally and internationally, and has published more than 200 scientific articles, abstracts and reviews in prestigious peer-reviewed journals.

Medical School
  • Johns Hopkins University School of Medicine, Baltimore, MD
  • The John Hopkins Hospital, Baltimore, MD
  • The John Hopkins Hospital, Baltimore, MD
  • Harvard Medical School, Boston, MA
  • English


Steven J. O' Day, M.D.
2121 Santa Monica Boulevard
Santa Monica, CA 90404
(310) 829-8317
(310) 315-6143


  • Medical Oncology (Board Certified)
  • Hematology and Medical Oncology
Clinical Interests
  • Malignant Melanoma
  • Skin Cancer
  • Immunotherapy
  • Breast Cancer


Insurances Accepted
  • Aetna PPO/POS/EPO
  • Anthem Blue Cross PPO/POS/EPO
  • Cigna PPO/POS/EPO
  • Covered CA Anthem BC HMO
  • Covered CA Anthem BC PPO/EPO
  • Covered CA Blue Shield HMO
  • Covered CA Blue Shield PPO/EPO
  • Covered CA Health Net PPO
  • Covered CA LA Care HMO
  • Health Net PPO/EPO/POS
  • Humana ChoiceCare PPO
  • Medicare
  • MultiPlan LTD PPO
  • Tricare PPO
  • United Healthcare PPO/POS/EPO
Insurance Medical Groups
  • Axminister Medical Group/IPA
  • HealthCare Partners Medical Group