Beryl McCormick, MD, FACR
Radiation Oncologist
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About Me
- Attending Radiation Oncologist
I am a radiation oncologist and senior member of the External Beam Radiotherapy Service at Memorial Sloan Kettering in Manhattan. I work as part of a team of specialists from different areas to treat people with breast cancer. We care for about 350 patients each year.
With the exception of 18 months in the early 1980s — when I worked at Albert Einstein Hospital to gain experience with breast conservation techniques — I have been at MSK since 1974, when I was a resident.
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My interest in medicine started at a young age. As a child, I was often sick with infections, and our family doctor would make a house call and put me on antibiotics. I usually felt better very soon and came to respect the healing powers of medicine. In medical school, I did research on childhood leukemia and first learned about radiation as a treatment for cancer. The field is appealing to me because I love math and physics.
Patients arrive in my office with a wide range of knowledge, worries, and expectations about breast cancer. “Is it safe to be around babies or children when I am getting breast radiation?” is one of the questions they most commonly ask. The answer is yes — the external beams that we use turn on and off like a light switch. This means that there is no radiation that lingers in the room after treatment, nor any that leaves with people receiving radiation.
Patients also want to know how we can be sure that radiation worked. Some kinds of cancers have what we call “markers” that tell us how well the treatment (be it surgery, radiation, or a system-wide treatment like chemotherapy) worked. Prostate cancer in men is the best example; a simple blood test for prostate specific antigen (a marker for prostate cancer) provides information on the success of the treatment.
Despite much past and ongoing research, we do not yet have such a marker in breast cancer. However, breast imaging after treatment, like a mammogram, can help us understand if the treatment worked. After patients complete treatment, their doctors will give them more information on the types of imaging that can be used to monitor treatment response based on the type and stage of breast cancer.
I try very hard to communicate in a way that connects with everyone who comes to me for care. I work to reassure my patients about the effectiveness of therapy by sharing the excellent evidence we have from thousands of patients who have taken part in cancer clinical trials. I like to be upbeat and welcoming, as I would be with a visitor to my home. I hope patients leave with a better understanding of their condition and treatment plan.
I am currently researching the effectiveness of radiation versus observation in patients with low-risk ductal carcinoma in situ (DCIS), a type of noninvasive breast cancer. I have also contributed to a novel treatment for certain older women without radiation therapy (RT).
I continue to refine the use of RT in the prone (face-down) position for people with breast cancer. This helps improve long-term cosmetic outcomes and protect vital organs like the heart and lungs. My newest research will explore whether breast radiation after surgery has an impact on patients’ ability to exercise.
In addition to conducting research aimed at improving the ways that we use RT for the treatment of breast cancer, I have advised on best practices for breast cancer treatment and management on a national level. I served for over 20 years 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 and former Chairman of the Breast Committee for the Radiation Therapy Oncology Group Cooperative Group. I have served on many consensus panels and have written extensively on both breast and eye cancers.
In my spare time, I love needlepoint and knitting, gardening, and traveling with my family.
A radiation oncologist is a cancer doctor with special training in using radiation therapy (RT) to treat cancer with radiation.
My Specialties
- Breast Cancer
Education
- MD, University of Medicine and Dentistry of New Jersey
Residencies
- Radiation Oncology - Memorial Sloan Kettering Cancer Center
Awards and Honors
- Castle Connolly: Exceptional Women in Medicine (2024)
- Castle Connolly: America’s Top Doctor (2024)
- Top Doctors New York Metro Area, Castle Connolly (2023)
- Exceptional Women in Medicine Award, Castle Connolly (2023)
- Castle Connolly: America's Top Doctors (2023)
- Castle Connolly: New York Magazine Best Doctors (1996-2018)
- Insitut Curie “Clinical Honoree” Award (2012)
- Good Housekeeping “Best Doctors in America” (1989, 1992)
Board Certifications
- Radiation Oncology
Insurance Information
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Contact and Location
Dr. McCormick sees patients at one location.
Looking to see a doctor at a different location? See all MSK locations.
Colleagues
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.
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See all External Beam Radiotherapy Service, Manhattan doctors
Clinical Trials
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.
Search clinical trialsResearch and Publications
Visit PubMed for a full listing of Dr. McCormick’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.
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Disclosures
Doctors and faculty members often work with pharmaceutical, device, biotechnology, and life sciences companies, and other organizations outside of MSK, to find safe and effective cancer treatments, to improve patient care, and to educate the health care community.
MSK requires doctors and faculty members to report (“disclose”) the relationships and financial interests they have with external entities. As a commitment to transparency with our community, we make that information available to the public.
Beryl McCormick discloses the following relationships and financial interests:
No disclosures meeting criteria for time period
If you’re a patient at MSK and would like more information about your doctor’s external relationships, please talk with your doctor.
The information published here is a complement to other publicly reported data and is for a specific annual disclosure period. There may be differences between information on this and other public sites as a result of different reporting periods and/or the various ways relationships and financial interests are categorized by organizations that publish such data.
This page and data include information for a specific MSK annual disclosure period (January 1, 2023 through disclosure submission in spring 2024). This data reflects interests that may or may not still exist. This data is updated annually.
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