Zachary S. Zumsteg, MD

Assistant Professor, Radiation Oncology

Samuel Oschin Comprehensive Cancer Center, AC1004
8700 Beverly Blvd.
Los Angeles, CA 90048





Zachary S. Zumsteg, MD

Assistant Professor, Radiation Oncology

  • Radiation Oncology

HPV (Human Papillomavirus)

Head and Neck Cancers

Head and Neck Tumors

Kidney Cancers

Laryngeal Cancer


Oral Cancers (Lip, Mouth, Throat, Gums)

Oropharyngeal Cancers (Tonsil, Tongue Base)

Prostate Cancers

Salivary Gland Tumors

Skin Cancers

Skull Base Tumors

Testicular Cancers

Thyroid Cancers

Zachary S. Zumsteg, MD, is a faculty member in the Department of Radiation Oncology at Cedars-Sinai Samuel Oschin Comprehensive Cancer Institute. He completed his training in radiation oncology at Memorial Sloan Kettering Cancer Center. Dr. Zumsteg specializes in the treatment of head and neck, and genitourinary cancers. In addition to his clinical practice, he is actively engaged in research spanning epidemiology, health services, clinical trials and translational applications. Through this work, Dr. Zumsteg has developed a novel risk stratification system for patients with intermediate risk prostate cancer that is currently widely used by oncologists in clinical practice and cited in National Comprehensive Cancer Network Guidelines. Additionally, he has helped identify changing epidemiologic patterns and studied novel therapeutic paradigms for head and neck cancers arising in older adults. He is the author of numerous peer reviewed publications, with articles appearing in journals such as Lancet Oncology, Journal of Clinical Oncology, JAMA Oncology, European Urology, Clinical Cancer Research, Cancer, and the International Journal of Radiation Oncology, Biology and Physics. Dr. Zumsteg's research program attempts to bridge epidemiology, clinical outcomes, and biology, thereby utilizing tumor, and patient, associated factors to optimize personalization of treatment for head and neck and genitourinary cancers.

  • Undergraduate: University of Miami, 2003
  • Master's: Stanford University, 2005
  • Medical School: UCLA David Geffen School of Medicine, 2010
  • Internship: UCLA-Olive View Medical Center, 2011
  • Residency: Memorial Sloan Kettering Cancer Center, 2015

View CV as a PDF

  • Alpha Omega Alpha Medical Honor Society
  • Howard Hughes Medical Institute Research Training Fellowship
  • Radiation Research Society Scholars-In-Training Award
  • ASTRO Annual Meeting Scientific Abstract Travel Award, 2014
  • Best of ASTRO Abstract Selection, 2013

Click here for a list of peer-reviewed publications.

  • Zumsteg ZS, Daskivich TJ, Sandler HS. Salvage Radiotherapy for Biochemically Recurrent Prostate Cancer After Prostatectomy. J Clin Oncol. 2016 Aug 29. [Epub ahead of print].
  • Zumsteg ZS, Morse N, Krigsfeld G, Gupta G, Higginson DS, Lee NY, Morris L, Ganly I, Shiao SL Powell SN, et al. Taselisib (GDC-0032), a Potent β-Sparing Small Molecule Inhibitor of PI3K, Radiosensitizes Head and Neck Squamous Carcinomas Containing Activating PIK3CA Alterations. 2016 Apr 15;22(8):2009-2019.
  • Zumsteg ZS, Spratt DE, Pei I, Zhang Z, Yamada Y, Kollmeier M, Zelefsky MJ. A new risk classification system for therapeutic decision making with intermediate-risk prostate cancer patients undergoing dose-escalated external-beam radiation therapy. Eur Urol. 2013 Dec;64(6):895-902.
  • Zumsteg ZS, Kim S, David J, Yoshida E, Tighiouart M, Shiao SL, Scher K, Mita A, Sherman E, Lee NY, Ho AS. The Impact of Chemoradiation on Survival for Patients with T1-2N1 Head and Neck Cancer. Cancer. 2016 Dec 21. doi: 10.1002/cncr.30508. [Epub ahead of print]
  • Zumsteg ZS, Cooks-Wiens G, Yoshida E, Shiao SL, Lee NY, Mita A, Jeon C, Goodman MT, Ho AS. Incidence of Oropharyngeal Cancer Among Elderly Patients in the United States. JAMA Oncol. 2016 Dec 1;2(12):1617-1623.
  • Ho AS, Kim S, Tighiouart, Gudino C, Mita A, Scher KS, Laury A, Prasad R, Shiao SL, Van Eyk JE, Zumsteg ZS. Metastatic Lymph Node Burden and Survival in Oral Cavity Cancer. J Clin Oncol. 2017.

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