Beryl McCormick, MD, FACR

Radiation Oncologist

Chief, External Beam Radiotherapy Service, Manhattan

Conditions Treated:

Beryl McCormick

About Me

I am a board-certified radiation oncologist and Chief of the External Beam Radiotherapy Service in Memorial Sloan Kettering’s Manhattan facilities. I work as part of a multidisciplinary group of specialists to treat patients who have breast cancer and those with cancer of the eye (retinoblastoma and ocular melanoma).

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With the exception of 18 months in the early 1980s working at Albert Einstein Hospital to gain experience with breast conservation techniques, I have been at Memorial Sloan Kettering since 1974 when I was a resident.

My clinical research efforts include studies comparing the effectiveness of radiation to observation in patients with low-risk duct carcinoma in situ. I have also developed a novel treatment for elderly women, using single-dose intra-operative radiation therapy, and continue to refine the use of radiation therapy with patients in the prone, or face-down, position, in an effort to improve the long-term cosmetic outcomes and to protect normal tissue in women with breast cancer.

I serve on the breast committee for the National Comprehensive Cancer Network (NCCN) guidelines panel. I am a former chair of the Breast Program Committee for the American Society of Clinical Oncology (ASCO) and former Chairman of the Breast Committee for the Radiation Therapy Oncology Group (RTOG) Cooperative Group. I have served on many consensus panels, and have written extensively on both breast and eye cancers.

  • Clinical Expertise: Breast Cancer; Tumors of the Eye and Orbit
  • Languages Spoken: English
  • Education: MD, New Jersey College of Medicine
  • Residencies: Memorial Sloan Kettering Cancer Center
  • Board Certifications: Radiation Oncology

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Visit PubMed for a full listing of Beryl McCormick’s journal articles

Pubmed is an online index of biomedical articles maintained by the U.S. National Library of Medicine and the National Institutes of Health.

Clinical Trials

Research is integral to our mission at Memorial Sloan Kettering, and clinical trials help us discover better forms of patient care and treatment. For you, this could mean access to a new therapy or therapy combination. Click to see a list of the trials I’m currently leading.


Most major health insurers offer plans that include MSK as one of their in-network providers. If MSK is in-network, it means all our doctors are too. Medicaid and New York State Medicare also provide benefits for care at MSK.

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