Borys R. Mychalczak, MD

Radiation Oncologist

4.9 | 423 reviews

Areas of Expertise

Conditions I Treat

Prostate cancer and conditions
Lung cancer
Head and neck cancers

My Specialties

Brachytherapy
Intensity-modulated radiation therapy (IMRT)
Image-guided radiation therapy (IGRT)

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Dr. Mychalczak's Office Information

Languages: English & Ukrainian

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English

Get to Know Me

I am a radiation oncologist who cares for people with a variety of cancers at Memorial Sloan Kettering Westchester and Memorial Sloan Kettering Bergen. I am particularly focused on prostate cancer, breast cancer, and gynecologic cancers.

I am an expert in the most sophisticated forms of radiation therapy, including stereotactic body radiosurgery, brachytherapy, intensity-modulated radiation therapy, and image-guided radiation therapy. I see approximately 350 new patients each year.

Growing up, I loved watching the popular medical drama Marcus Welby, M.D., and thought I would be a general internist just like Dr. Welby was. But when my grandmother was diagnosed with cancer, I decided to go into oncology. In medical school I attended a lecture on radiation oncology that inspired me to narrow my focus. Through radiation oncology, I realized, I could combine my interests in mathematics, physics, and cancer care.

I have been with MSK for more than 30 years. As Chief of Radiation Oncology at MSK Westchester and MSK Bergen, I work hard to integrate the latest and most advanced forms of therapy into our practice. I’m passionate about providing our patients with the most cutting-edge therapies and treatments, closer to home. Together with our exceptional medical physicists and support staff, we collaborate closely with our colleagues across all MSK facilities to ensure that everyone we treat receives the best possible care.

I am a member of the prostate cancer research team in the Department of Radiation Oncology and participate in various clinical trials at MSK and nationally. I have also served on many committees, including the Oral Board Examination Committee of the American Board of Radiology.

When I first meet patients, I strive to learn what they already know or may have heard about their diagnosis and radiation therapy. I aim to clear up any misconceptions and deliver a clear explanation of their issue and how we’re going to work to resolve it. I know my patients receive an extraordinary amount of information about their condition that can be overwhelming at times, so I encourage them to take treatment one day at a time.

When I’m not working, I love being a dad to my 6-year-old son and 11-year-old daughter. I also love gardening and reading and am particularly interested in financial nonfiction.

What I Do at MSK

A radiation oncologist is a cancer doctor with special training in using radiation therapy (RT) to treat cancer with radiation.

Chief, Radiation Oncology, MSK Westchester & MSK Bergen

Conditions I Treat

Prostate cancer and conditions
Lung cancer
Head and neck cancers
Breast cancers and conditions
Gynecologic cancers and conditions
Colorectal cancer and conditions

My Specialties

Brachytherapy
Intensity-modulated radiation therapy (IMRT)
Image-guided radiation therapy (IGRT)
Stereotactic radiosurgery (SRS)

Education

MD, Wayne State University

Residencies

Radiation Oncology - Memorial Sloan Kettering Cancer Center

Board Certifications

Radiation Oncology

Insurance Information

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New Patients

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Current Patients

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Contact and Location

Dr. Mychalczak sees patients at one location.

Office Phone

914-367-7370

Location

West Harrison, NY

Memorial Sloan Kettering Westchester

500 Westchester Avenue West Harrison NY 10604

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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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Clinical Trials

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.

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Research and Publications

Publications on PubMed

Visit PubMed for a full listing of Dr. Mychalczak’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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Patient Reviews

Your trust is our main concern

We strive to keep reviews trustworthy, honest and fair. Learn more about our patient experience reviews.

4.9 423 reviews

4.8 Provider's Explanations Easy to Understand
4.9 Trusts Provider with Care
4.9 Provider Listened Carefully
4.9 Likelihood of Recommending Provider

Mar 25, 2025

I feel very comfortable and relieved with the doctors input and treatment plan. I look forward to coming back.

Mar 24, 2025

Dr. Borys Mychalczak has been treating me for Prostate Cancer by administering Hormone Therapy along with beam radiation. Under his treatment I made significant progress. He is very sincere and devoted to his patients. Ms. Lisa RN is a Team member who assists him. She treats me with kindness and compassionate care. I am very fortunate to be under their care. Thank you. - [patient name removed]

Mar 24, 2025

Dr. M took time to explain options and probable side effect and outcome differences. He is following up by requesting and viewing MRI from previous provider. Very positive telehealth visit.

Mar 20, 2025

Dr. Borys Mychalczak was prepared for the telemedicine consult, explained how studies support his treatment plan, and engaged in a conversation on the staging of my cancer and the pros & cons of a radiologic approach to treatment. I enjoyed talking with Dr. Mychalczak and appreciate his time. He seems very good.

Mar 19, 2025

The doctor was personable ,knowledgeable and informative. He reassured me about my condition in a very professional and sensitive manner. The rest of the staff that I encountered were great as well.

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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.

Borys R. Mychalczak 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.

Learn more about MSK’s COI policies here. For questions regarding MSK’s COI-related policies and procedures, email MSK’s Compliance Office at ecoi@mskcc.org.

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