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Dr. Paul Youn

Radiation Oncology

Paul Youn, MD is a board certified radiation oncologist. He specializes in treatment of cancers in prostate, breast, lung, head and neck, gastrointestinal (GI) system, gynecological (GYN) system, skin, and lymphoma.

He is experienced with multiple radiotherapy techniques, including stereotactic radiosurgery (SRS), stereotactic ablative body radiotherapy (SABR), volumetric modulated arc therapy (VMAT), intensity modulated radiation therapy (IMRT), and prostate and gynecologic brachytherapy.

He completed undergraduate studies at Cornell University, graduating cum laude with B.S. in Biological and Environmental Engineering.

He earned his medical degree with distinction in research at University of Rochester School of Medicine and Dentistry. He then went onto residency training in radiation oncology at University of Rochester Medical Center, where he served as chief resident.

Credentials:  MD
Education & Training
   Residency:    University of Rochester Medical Center
    Medical School:    University of Rochester School of Medicine and Dentistry
    College:    Cornell University


John T Mather Memorial Hospital
Long Island Community Hospital
Peconic Bay Medical Center
St. Charles Hospital

Patient Reviews

  • "Dr Youn is a highly knowledgeable doctor. He walks you through your scans so you can truly understand what is going on. He is an important part of my team who is helping me stay healthy."
      from Jennifer 5.0 Stars - (2025-08-08)
  • "All I can say is I'm overly impressed with the care and concern your staff shows. I have never experienced where my appointments have been fast ,all procedures were explained in depth. Making my visits very confortable."
      from Daniel 5.0 Stars - (2025-08-07)
  • "love the staff and Dr. Youn. He listens to your concerns. Staff friendly and place is clean."
      from Dee 5.0 Stars - (2025-07-26)
  • "Filling out the questions, some which were already asked and answered."
      from Joseph 4.0 Stars - (2025-07-17)
  • "Dr. Roy Chen, referred me to Dr. Paul Youn of Riverhead Radiation Oncology this past Monday (7/14/25) for a consultation. Dr Youn saw us right after my visit with Dr Chen, on the same day. That doesn’t happen to often anymore, and we are thankful to have him now on our medical team. He was friendly and knowledgeable; explained the treatment options and answered all our questions. We are fortunate to have NYC&BS right here in Riverhead."
      from Allen 5.0 Stars - (2025-07-15)
  • "Dr. Youn was very clear in explaining my diagnosis, what course of therapy I needed and possible side effects. I feel he is very knowledgeable in regard to radiation oncology."
      from D 5.0 Stars - (2025-06-10)
  • "Great experience with Dr. Youn and staff"
      from teresa 5.0 Stars - (2025-06-05)
  • "Dr. Youn was very professional during our consultation as he provided us with detailed information about our treatment options. Through his extensive knowledge experience and candor., he was able to help us make more informed and timely decisions."
      from Sandra 5.0 Stars - (2025-05-08)
  • "Always a great experience! ( though wish I didn’t have to be there). Georgia and Karen are just delightful and Dr Youn is so positive!"
      from William 5.0 Stars - (2025-04-24)
  • "Dr. Joun was very professional and answered all my questions and concerns."
      from Faith 5.0 Stars - (2025-04-10)