Dr. Steven Seyedin is a UCI Health radiation oncologist who specializes in treating gastrointestinal and genitourinary cancers.

Steven N. Seyedin, MD


Radiation Oncology

Clinical Interests

anal cancer, bladder cancer, colorectal cancer, esophageal cancer, gallbladder cancer, gastric cancer, gastrointestinal cancers, kidney cancer, liver cancer, metastatic liver cancer, pancreatic cancer, prostate cancer, stereotactic body radiation therapy (SBRT)

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  • American Board of Radiology, Radiation Oncology
  • English
Medical School
David Geffen School of Medicine at UCLA
University of Illinois College of MedicineInternal Medicine
University of Iowa Hospital and ClinicsRadiation Oncology
Professional Positions
  • Assistant Professor — Department of Radiation Oncology, UCI School of Medicine
  • Member — Radiation Research Society
  • Member — American Society of Clinical Oncology
  • Member — American Society for Radiation Oncology
  • Member — Radiologic Society of North America
Awards and Recognition
  • Excellence in Clinical Teaching Award — University of Iowa Hospital and Clinics, 2020
  • Resident Recognition Award in Biology — ASTRO Annual Meeting, 2020
  • Abstract Travel Award — ASTRO Annual Meeting, 2019
  • Prostate Scholarship Workshop — American Brachytherapy Society, 2019
  • Roentgen Residency Research Award — Radiation Society of North America, 2018, 2019
More Information

Dr. Steven N. Seyedin is a board-certified UCI Health radiation oncologist who specializes in the treatment of cancers of the gastrointestinal and genitourinary systems.

He is skilled in stereotactic body radiation therapy (SBRT) and immunoradiotherapy. His clinical interests include treatment of cancers of the prostate, kidney, stomach, liver, pancreas, bladder and gallbladder, as well as colorectal and esophageal cancers.  

Seyedin earned his medical degree from the David Geffen School of Medicine at UCLA, followed by a research fellowship in radiation oncology at MD Anderson Cancer Center in Houston, Texas. He completed residency training in radiation oncology at the University of Iowa Hospital and Clinics in Iowa City.

His research interests involve the application of radiation for gastrointestinal and genitourinary cancers. His work has been published in national journals, including JAMA OncologyFrontiers in Oncology, Radiation Research and the International Journal of Radiation Oncology, Biology, Physics.

Seyedin, who speaks conversational Farsi, sees patients at the UCI Health Chao Family Comprehensive Cancer Center in Orange.

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