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Robert Sung Gil Kwon

Robert Sung Gil Kwon

•Staff Physician, Dept. of Radiation Oncology, VA Long Beach Healthcare System
•Health Sciences Associate Clinical Professor of UCI Radiation Oncology

Biography

Robert Sung Gil Kwon, M.D., is a Staff Physician in the Department of Radiation Oncology at the VA Long Beach Healthcare System and Health Sciences Associate Clinical Professor of UCI Radiation Oncology. He received his M.D. from Temple University School of Medicine and completed his radiation oncology residency at the University of California, Irvine, where he served as Chief Resident. Kwon has over two decades of clinical experience in radiation oncology, having previously served as Medical Director of the Department of Radiation Oncology at Los Alamitos Medical Center for approximately 16 years.

Kwon's research focuses on prostate cancer, particularly the use of genomic testing and advanced imaging to guide treatment decisions. He serves as a local site investigator for multiple clinical trials, including the VA STARPORT trial examining systemic therapy with or without PET-directed local therapy for oligometastatic prostate cancer, and studies investigating the utility of AI-based predictive models and molecular profiling in veterans with prostate cancer. His recent publications examine the use of cell cycle progression assays and PSMA PET/CT imaging to predict disease upstaging and guide treatment de-escalation in unfavorable intermediate to very high-risk prostate cancer patients.

Kwon is board certified by the American Board of Radiology and holds medical licenses in California, Hawaii. He serves as the Long Beach VA Site Radiation Oncology Program Director for the UCI Radiation Oncology Residency and as a local site investigator for NRG clinical trials. Kwon is a member of the American Society of Therapeutic Radiology and Oncology (ASTRO), where he has served as an abstract reviewer and member of the History Committee, and the Korean American Society of Therapeutic Radiology and Oncology (KASTRO), where he serves as Social Chair.

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Education

  • B.A. in Biological Basis of Behavior, University of Pennsylvania, 1991
  • M.D., Temple University School of Medicine, 1995
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Distinctions

  • Southern California Super Doctors™, 2007, 2016-2021
  • Who's Who Top Doctors Honors Edition, 2015-2016
  • Los Angeles Super Doctors™, 2007
  • Best Doctors in America®, 2005-2006, 2007-2008, 2013
  • Scientific Exhibit Award - Best of Show, Los Angeles Radiological Society / Southern California Radiation Oncology Society 52nd Annual Midwinter Conference, 2000
  • Pennsylvania State University Family Practice Scholarship, 1992
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Areas of Expertise

  • Radiation Oncology
  • Prostate Cancer Treatment
  • Brachytherapy Techniques
  • Stereotactic Radiosurgery
  • PSMA PET Imaging
  • Genomic Biomarker Testing
  • Oligometastatic Disease Management

Recent Publications

  • R.S. Kwon, K. Kim, R.P. Kwon, G.K. Harada, S.P.H. Lee, M. Behdad, A.N. Munjal, N.V. Peterson, J. Park, T.S. Quang, “Utilization of a 46 Gene Assay Genomic Test with Clinicopathologic Factors in Unfavorable Intermediate to Very High Risk Prostate Cancer To Predict Upstaging Via PSMA PET/CT Scan”, International Journal of Radiation Oncology Biology Physics, vol. 123, no. 1S, pp. e567, 2025.
  • JE Juarez Casillas, J Nikitas, MB Rettig, RE Reiter, A Lee, ML Steinberg, L Valle, TR Kalbasi, J Calais, J Czernin, MA Eala, S Tsai, N Kane, AA Solanki, R Sexton, S Duriseti, GR Berenji, WJ Aronson, IP Garraway, MG Chang, et al., “Pooled Analysis of the SOLAR and SATURN Clinical Trials Comparing Progression of Synchronous Versus Metachronous Prostate-specific Membrane Antigen-defined Oligometastatic Prostate Cancer Following Systemic and Tumor-directed Therapy”, European Urology Oncology, 2025.
  • Abhishek A Solanki, Kevin Zheng, Alicia N Skipworth, Lisa M Robin, Ryan F Leparski, Elizabeth Henry, Matthew Rettig, Joseph K Salama, Timothy Ritter, Jeffrey Jones, Marcus Quek, Michael Chang, Alec M Block, James S Welsh, Aryavarta Kumar, Hann-Hsiang Chao, Albert C Chen, Ronald Shapiro, Rhonda L Bitting, Robert Kwon, et al., “Challenges and Opportunities in Developing an Oncology Clinical trial Network in the United States Veterans Affairs Health Care System: The VA STARPORT experience”, Curr Oncology, 2024.
  • NG Nickols, S Tsai, N Kane, S Tran, L Ghayouri, S Diaz-Perez, M Thein, N Anderson-Berman, J Eason, AU Kishan, ML Steinberg, RE Reiter, SP Lee, GE Gin, R Kwon, MG Chang, HH Chao, AA Solanki, R Sexton, M Lewis, et al., “Systemic and Tumor-directed Therapy for Oligometastatic Prostate Cancer: The SOLAR Phase 2 Trial in De Novo Oligometastatic Prostate Cancer”, European Urology Oncology, 2024.
  • R.S Kwon, K.Cha, D.Applewhite, FI.Chu, “Efficacy of Adjuvant High Dose Iodine-131 Ablation for High Risk Differentiated Thyroid Carcinoma”, International Journal of Radiation Oncology Biology Physics, vol. 108, no. 3, pp. e832, 2020.
  • DC Khan, D.Huang, R.Kwon, “Evolution of a Novel Radiation Oncology Cancer Disparities Research Program in an Indigent Los Angeles Community”, International Journal of Radiation Oncology Biology Physics, vol. 69, no. 3, 2007.
  • ML Steinberg, H.Knapp, D.Khan, D.Huang, R.Kwon, “Patient-centered Satisfaction and Well Being Assessment in a Lay Patient Navigator Program for an Underserved Radiation Oncology Patient Population”, International Journal of Radiation OncoBiology Physics, vol. 69, no. 3, 2007.
  • M Al-Ghazi, R Kwon, J Kuo, N Ramsinghani, R Yakoob, “The University of California, Irvine experience with tomotherapy using the Peacock system”, Medical Dosimetry, vol. 26, no. 1, 2001.
  • Al-Ghazi, M., Ammirati, M., Kuo, J., Kwon, R, “Tomotherapy with Peacock: The University of California, Irvine Experience”, 1999. Presented at 85th Annual Meeting of RSNA.
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Contact Information

Email: rkwon4@uci.edu

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This profile was created with the help of AI.

Last updated on 8/21/2026.