Hiram A. Gay, MD

Hiram A. Gay, MD

Professor of Radiation Oncology
Chief, Genitourinary Service
Medical Director of Radiation Oncology, Siteman Cancer Center – South County


  • BS, Computer Engineering: University of Puerto Rico, Mayaguez, Puerto Rico (1996)
  • MD: University of Puerto Rico, San Juan, Puerto Rico (2000)
  • Residency, Radiation Oncology: SUNY Upstate Medical University, Syracuse, New York (2005)

Board Certifications

  • Certified by the American Board of Radiology in Radiation Oncology (2006)


Galileo Gallilei Award: The European Journal of Medical Physics (2009)

Clinical Interests

Head and Neck Oncology
Genitourinary Oncology
Bladder Cancer
Skin Cancer
Dupuytren’s contracture
Plantar fibromatosis
Prostate high dose rate (HDR) brachytherapy
Proton therapy
IMRT (Intensity Modulated Radiation Therapy)
IGRT (Image Guided Radiation Therapy)
SBRT (stereotactic body radiation therapy)
Patient quality of life


Hiram A. Gay, MD is a professor of radiation oncology and chief of genitourinary service. He earned a medical degree from University of Puerto Rico in 2000 and completed his residency in radiation oncology at SUNY Upstate Medical University in 2005. Dr. Gay joined the Washington University faculty in 2009 from East Carolina University, The Brody School of Medicine. His clinical practice and academic interests include cancer of the genitourinary area (prostate, urologic, bladder and kidney) cancer and head and neck cancer. He serves as the Medical Director of Radiation Oncology at Siteman Cancer Center – South County.


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