UCI Health will see you now: Welcome to our new co-workers and patients from Fountain Valley, Lakewood, Los Alamitos and Placentia Linda! 

Dr. Arash Rezazadeh, UCI Health hematology oncologist

Arash Rezazadeh Kalebasty, MD



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  • American Board of Internal Medicine, Hospice and Palliative Medicine [Internal Medicine]
  • American Board of Internal Medicine, Medical Oncology [Internal Medicine]
  • English
  • Farsi
  • Spanish
Medical School
Shahid Beheshti University of Medical Sciences
University of LouisvilleInternal Medicine
University of LouisvilleMedical Oncology and Hematology
Professional Positions
  • Professor — Division of Hematology/Oncology, Department of Medicine, UC Irvine School of Medicine
  • Member — American Society of Clinical Oncology
  • Member — European Society for Medical Oncology
  • Member — NRG Oncology Genitourinary Committee

Awards and Recognition
  • 2017 Cure Champion — American Cancer Society

More Information

Dr. Arash Rezazadeh Kalebasty is a board-certified UCI Health medical oncologist who specializes in the diagnosis and treatment of genitourinary cancers. His clinical interests include immunotherapy and orther targeted therapies to treat cancers of the prostate, bladder, kidney and testes.

He earned his medical degree at Shahid Beheshti University of Medical Sciences in Tehran, Iran. He completed a residency in internal medicine and a fellowship in medical oncology and hematology at Kentucky’s University of Louisville School of Medicine.

Rezazadeh has served as principal investigator in numerous clinical trials for genitourinary malignancies, particularly cancers of the bladder and prostate. Some of these trials have led to the approval of novel first-in-class cancer therapies.

He also has presented his studies at many national and international cancer conferences, and he has published numerous research papers in his field. He is a member of the American Society of Clinical Oncology, the European Society for Medical Oncology and the NRG Oncology Genitourinary Committee. He is also an editorial reviewer for the publications Bladder Cancer and Annals of Case Reports.

Rezazadeh — who also speaks Farsi and Spanish — sees patients at the UCI Health Chao Family Comprehensive Cancer Center in Orange.

Chao Family Comprehensive Cancer Center
101 The City Drive South, Building 23
Orange, CA 92868
Phone: 714-456-8000
Fax: 855-211-3729