Memorial Sloan Kettering radiation oncologist Diana Roth O'Brien

Diana Roth O’Brien, MD, MPH

Radiation Oncologist

Areas of Expertise

Conditions I Treat

  • Breast cancers and conditions
  • Gastrointestinal cancers and conditions
  • Anal cancer

My Specialties

  • Image-guided radiation therapy (IGRT)
  • Intensity-modulated radiation therapy (IMRT)
  • Stereotactic body radiation therapy (SBRT)
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Dr. Roth O’Brien's Office Information
Languages: English
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Get to Know Me

I am a radiation oncologist who specializes in using cutting-edge radiotherapy techniques to treat a variety of cancers. These techniques include image-guided radiation therapy, intensity modulated radiation therapy, stereotactic radiosurgery, and stereotactic body radiotherapy. 

I see patients at Memorial Hospital in New York City and at MSK Bergen in New Jersey. 

From early in my medical training, I was drawn to radiation oncology because of the deeply multidisciplinary nature of cancer care. MSK combines a collaborative environment, effective and innovative technology, and extensive resources that allow me to ensure that all of my patients receive optimal care.

Much of my research has focused upon identifying causes of, and reducing side effects associated with, radiotherapy. I am passionate about using my expertise and technology to ensure that my patients not only have their cancer effectively managed, but enjoy the best possible quality of life for years and decades following their treatment. During medical school, in addition to my medical degree, I pursued a Master of Public Health. This additional training has made me acutely aware of how many broad societal factors — beyond the scope of clinic visits — deeply influence the decisions that patients make. As a result, my research has also investigated the barriers that patients face in completing optimal, timely care, and methods to mitigate these obstacles.

For many patients, radiotherapy is a largely unknown and daunting process; as such, I prioritize listening and educating. Regardless of diagnosis, each patient brings unique perspective, values, concerns, and needs to a medical encounter. My aim is to explain complex treatment plans patiently and in an approachable way, such that my patients feel empowered to make informed, personalized decisions, and prepared to embark upon radiotherapy.

Outside of the office, I enjoy traveling, SCUBA diving, knitting, and spending time with my dogs.

What I Do at MSK

I'm a radiation oncologist, which is a cancer doctor with special training in using radiation therapy (RT) to treat cancer.

  • Assistant Attending Radiation Oncologist
Areas of Expertise

Conditions I Treat

  • Breast cancers and conditions
  • Gastrointestinal cancers and conditions
  • Anal cancer
  • Rectal cancer
  • Liver cancer and conditions
  • Liver metastases
  • Gallbladder cancer
  • Pancreatic cancer
  • Stomach (gastric) cancer
  • Gynecologic cancers and conditions
  • Metastatic cancers

My Specialties

  • Image-guided radiation therapy (IGRT)
  • Intensity-modulated radiation therapy (IMRT)
  • Stereotactic body radiation therapy (SBRT)
  • Stereotactic radiosurgery (SRS)
Education & Honors

Education

  • MD, MPH, SUNY Downstate College of Medicine

Residencies

  • Radiation Oncology – NewYork-Presbyterian/Weill Cornell Medical Center

Board Certifications

  • Radiation Oncology

Awards and Honors

  • Delta Omega Alpha Public Health Honor Society (2015)
  • Alpha Omega Alpha Honor Medical Society (2015)
  • Best of ASTRO Abstract (2017)
  • The Radiosurgery Society Resident Committee (2019)

Insurance Information

Understanding your insurance options is an important part of managing your cancer care. We have relationships with many common healthcare providers and plans.

Don't see your carrier or plan? We can help you understand your coverage.

If you don't have health insurance or are worried that your care may not be fully covered, our financial assistance programs may be able to help.

If you have questions about insurance, call us at 646-497-9176.

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Contact and Location

Dr. Roth O’Brien sees patients at two locations.

Office Phone
Location
Montvale, NJ
New York, NY
Memorial Sloan Kettering Bergen
225 Summit Avenue Montvale NJ 07645
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Memorial Sloan Kettering Cancer Center
1275 York Avenue New York NY 10065
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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

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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. Roth O’Brien’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.

Diana Roth O’Brien 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 [email protected].


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