Memorial Sloan Kettering radiation oncologist Justin Mann

Justin M. Mann, MD

Radiation Oncologist

Clinical Expertise

Image-Guided Radiotherapy (IGRT); Intensity Modulated Radiotherapy (IMRT); Stereotactic Body Radiotherapy (SBRT); Stereotactic Radiosurgery (SRS); Central Nervous System Tumors; Breast Cancer; Prostate Cancer; Rectal Cancer; Esophageal Cancer; Lung Cancer

New Patient Appointments

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Accepted Insurance Providers

Dr. Mann accepts the following list of insurance providers. Select your insurance provider to see more details.

Contact and Location

Locations map

Find a Convenient Location

Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offers many services, including screening, chemotherapy, and medical testing.

About Me


MD, SUNY Upstate Medical University


Radiation Oncology - NewYork-Presbyterian/Weill Cornell Medical Center

Board Certifications

Radiation Oncology

I am a radiation oncologist who specializes in using highly effective, non-invasive, and cutting-edge techniques to treat cancer. These include image-guided radiation therapyintensity modulated radiation therapystereotactic radiosurgerystereotactic body radiotherapy, and brachytherapy. As a New Jersey native, I am excited by the opportunity to provide world-class care, expertise, technology, and support at MSK Basking Ridge and MSK Monmouth.

At all MSK locations, we provide a collaborative, team-based environment. Our patients and their families are at the center of everything we do. We also have access to the most advanced radiation therapy technologies. This allows us to deliver treatment more effectively and tailor it to our patients’ needs, while also minimizing potential side effects.

Upon initially meeting with patients, they often express concern about the treatment process. Many of their concerns come from a fear of the unknown surrounding radiation therapy. My goal is to promote trust and confidence by thoughtfully and thoroughly answering every question patients and caregivers have. I want them to feel well-informed, comfortable, and empowered about their care when they leave my office.

When not attending to patient treatment and care, I enjoy traveling, hiking, reading, cooking, bicycling, and spending time with family.

My goal is to promote trust and confidence by thoughtfully and thoroughly answering every question patients and caregivers have.

Dr. Mann

Awards and Honors

  • American Brachytherapy Society Prostate LDR/HDR Workshop Scholarship (2017)
  • Radiological Society of North America Roentgen Research Award (2017)
  • New York Weill Cornell Medical Center Alumni Council Distinguished Housestaff Award (2016)
  • Lynn Sage Breast Cancer Symposium Scholar Award (2016)
  • NewYork-Presbyterian/Queens Outstanding Research Award/Grant (2015)
  • Alpha Omega Alpha (ΑΩΑ) Honor Medical Society (2012)


Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

Clinical Trials

Smiling doctors in the lab

Find a Clinical Trial for You

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.

Research and Publications

Mann JM, Wu X, Christos P, Nagar H. The State of Surgical Axillary Management and Adjuvant Radiotherapy for Early-stage Invasive Breast Cancer in the Modern Era. Clin Breast Cancer. 2017.

Reznik E, Smith AW, Taube S, Mann JM, Yondorf MZ, Parashar B, Wernicke AG. Radiation and Immunotherapy in High-grade Gliomas: Where Do We Stand? Am J Clin Oncol. 2018;41(2):197-212.

Mann JM, Ramakrishna R, Magge R, Wernicke AG. Advances in Radiotherapy for Glioblastoma. Front Neurol. 2017;8:748

Mann JM, Osian A, Brandmaier A, Yan W, Sung KJ, Siegel B, Fink S, Kaplan BH, Fulman M, Wu G, Christos P, Nori D, Ravi A. Excellent Long-term Breast Preservation Rate Following Accelerated Partial-Breast Irradiation Using a Balloon Device. Clin Breast Cancer. 2016;16(3):217-22.

Mann JM, Kellman RM, Hahn SS, De la Roza GL, Gajra A. Radiation-induced epithelial-myoepithelial carcinoma in a patient previously treated with mantle-field radiation therapy for Hodgkin lymphoma. Head Neck. 2015;37(8):E96-8.

Mattes MD, Mann JM, Ashamalla H, Tejwani A. Routine histopathologic characteristics can predict oncotype DX™ recurrence score in subsets of breast cancer patients. Cancer Invest. 2013;31(9):604-6.