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Dr. Jason A. Zell is a UCI Health hematology-oncology specialist who focuses on the prevention and treatment of colon and other gastrointestinal cancers at the Chao Family Comprehensive Cancer Center.

Jason A. Zell, DO


Hematology-Oncology, Internal Medicine

Clinical Interests

colorectal cancer, gastrointestinal malignancies, cancer prevention

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  • American Board of Internal Medicine, Medical Oncology [Internal Medicine]
  • English
Medical School
Nova Southeastern University
University of California, Irvine Medical CenterInternal Medicine
University of California, Irvine Medical CenterHematology/Oncology
Professional Positions
  • Associate Professor — Division of Hematology/Oncology, Department of Medicine
  • Program Director — Hematology/Oncology Fellowship Program, UCI School of Medicine
Awards and Recognition
  • Physicians of Excellence, Orange County Medical Association — 2014-2023
More Information

Dr. Jason A. Zell is a board-certified UCI Health hematology-oncology specialist who focuses on the prevention and treatment of colon and other gastrointestinal cancers.

He received his medical degree from Nova Southeastern University, Fort Lauderdale, Fla. He completed his internal medicine residency training and hematology-oncology fellowship at  the UCI School of Medicine, via the American Board of Internal Medicine Research Pathway. 

Zell has received extramural research funding from the National Institutes of Health (NIH) to perform genetic epidemiology-based colorectal cancer research, and is principle investigator or co-investigator for several NIH-funded Phase 2 clinical trials involving patients with gastrointestinal malignancies.

Within SWOG, a clinical trials organization of the National Clinical Trials Network, he is the cancer control and prevention liaison to the gastrointestinal committee. Additionally, he is national principal investigator for S0820, a large multicenter, randomized Phase 3 trial involving risk reduction among resected colon cancer patients, which is supported by the NIH National Cancer Institute Division of Cancer Prevention, and conducted by SWOG. He has published more than 70 manuscripts and two book chapters.

Zell sees patients in Orange and Costa Mesa


Academic Profile

View this physician's faculty profile ›

Speakers Bureau Topics

  • Cancer Prevention: Diet, Lifestyle and Therapeutic Prevention
  • Cancer Prevention: Epidemiology, Screening and Early Detection
  • Colon Cancer: Multidisciplinary Management

UCI Health Chao Family Comprehensive Cancer Center
101 The City Drive South, Building 23
Orange, CA 92868
Phone: 714-456-8000
Fax: 855-211-3729
UCI Health — Costa Mesa
1640 Newport Blvd.
Costa Mesa, CA 92627
Phone: 949-999-2400
Fax: 844-965-9446