Memorial Sloan Kettering medical oncologist Ezra Rosen

Ezra Rosen, MD, PhD

Breast Oncologist & Early Drug Development Specialist


Assistant Attending Physician

Clinical Expertise

Breast Cancer; Clinical Trials; Developmental Therapeutics; Molecular Targeted Therapies


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 offer many services, including screening, chemotherapy, and medical testing.

See all locations

About Me


MD, PhD, University of California, Los Angeles


Internal Medicine - Columbia University Medical Center


Medical Oncology - Memorial Sloan Kettering Cancer Center

Board Certifications

Internal Medicine; Medical Oncology

I am a medical oncologist who specializes in breast cancer and early phase clinical trials.

Read more

I study the molecular mechanisms that drive a patient’s cancer, with the goal of bringing new treatments with higher efficacy and improved tolerability to the clinic. As a clinical investigator, I believe that clinical trials offer hope to patients through the development of new treatment options. 

When caring for my patients, I strive to help them better understand their disease which can make people feel informed and empowered. I present often complex treatment options in the clearest possible way to offer the best therapy to each patient based on their needs. Every day I work with an amazing interdisciplinary team of nurses, surgeons, radiation oncologists, pathologists, radiologists, and biologists, all united with the common goal of delivering the best cancer care.

Awards and Honors

  • Young Investigator Award, American Society of Clinical Oncology (2020)


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.

See all Early Drug Development Service doctors

See all Breast Medicine Service doctors

Clinical Trials

Read more
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.

Search clinical trials


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.

Ezra Rosen 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 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, 2021 through disclosure submission in spring 2022). 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].

View all disclosures