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Dr. Walter Choi

Radiation Oncology

Dr. Walter Choi is a board-certified Radiation Oncologist, highly regarded for his expertise in the field of targeted radiotherapy, including stereotactic radiosurgery, stereotactic body radiotherapy, and brachytherapy, with a particular interest in the treatment of cancers of the lung, prostate, breast, gastrointestinal system, central nervous system, as well as tumors of the eye and orbit.

Dr. Choi received his medical degree from SUNY Downstate College of Medicine in Brooklyn. After a medical internship at Long Island Jewish Medical Center, he returned to complete a residency in Radiation Oncology at SUNY Downstate, where he served as Chief Resident. Subsequently, he completed fellowships in stereotactic radiosurgery and brachytherapy at Beth Israel/Roosevelt Hospital and Montefiore Medical Center.

Dr. Choi is a member of several professional organizations, including the American Society for Radiation Oncology, the American Brachytherapy Society, the Korean American Society for Radiation Oncology, the New York Roentgen Society, the Connective Tissue Oncology Society, and the International Association for the Study of Lung Cancer.

Credentials:  MD
Education & Training
   Residency:    SUNY Downstate
 Internships    Long Island Jewish Medical Center
    Medical School:    SUNY Downstate College of Medicine
    Fellowships:    Beth Israel/Roosevelt Hospital, Montefiore Medical Center


Patient Reviews

  • "Dr. Choi was very thorough in his explanation of what to expect, during the radiation treatment process. He made me feel very comfortable and at ease."
      from Leonie 5.0 Stars - (2025-10-11)
  • "I have nothing but praise for you and your team. I have been impressed with the professionalism displayed during my treatment period. Keep up your good work and I wish to add that I will have no hesitation in referring your service to my colleagues."
      from Reginald 5.0 Stars - (2025-10-02)
  • "The doctor was incredibly professional; the best bedside manner I’ve ever experienced. I did not feel rushed at all and was given ample time to have all of my questions answered. He is very smart, kind, and compassionate which is hard to come across with Oncologists. His staff was kind as well. Would highly recommend him!"
      from Karnail 5.0 Stars - (2025-09-25)
  • "He was very nice"
      from charlette 5.0 Stars - (2025-09-16)
  • "Dr. Choi was excellent and very thorough with his explanation of choices of treatment and outcomes. Gave me a lot of information to make an informed decision."
      from Dereck 5.0 Stars - (2025-09-07)
  • "Dr.Choi was very professional & explained everything and made me feel very comfortable."
      from Vero 5.0 Stars - (2025-08-10)
  • "My experience has been very good so far."
      from Steliana 5.0 Stars - (2025-05-29)
  • "I am pleased to inform you that he is a great Doctor, with an excellent development and very dedicated to help me, I thank him very much for the way he treated me and explained everything I needed to know. God bless always."
      from Irma 5.0 Stars - (2025-05-22)
  • "I can’t recommend him enough!!! Compassionate and caring!"
      from michelle 5.0 Stars - (2025-05-15)
  • "Dr Choi and all the employees were very patient and caring ..I appreciate their service 🙏"
      from Tsering 5.0 Stars - (2025-05-14)