Memorial Sloan Kettering medical oncologist James Harding

James J. Harding, MD

Gastrointestinal Medical Oncologist & Early Drug Development Specialist

Areas of Expertise

Conditions I Treat

  • Liver cancer and conditions
  • Bile duct cancer (cholangiocarcinoma)
  • Gallbladder cancer

My Specialties

  • Immunotherapy
  • Targeted therapy
  • Early drug development
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Dr. Harding's Office Information
Languages: English
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Get to Know Me

I’m a board-certified medical oncologist and researcher at Memorial Sloan Kettering Cancer Center (MSK). 

I’m an expert in caring for people with liver cancer, gallbladder cancer, and bile duct cancer, and other cancers of the digestive system. I see patients at Rockefeller Outpatient Pavilion and at MSK Westchester.

I chose to become a doctor because of my own experience with illness. I know that a cancer diagnosis can feel scary and overwhelming for people. I use my years of training and the latest medical data to give every patient the best possible results.

I adopt a personal approach to patient care. I also work closely with other experts involved in your care to make sure you get the most complete care possible.

Besides seeing patients, I focus on finding new ways to fight cancers that are difficult to treat. I have helped lead the development of many new drugs that are now approved by the U.S. Food and Drug Administration to treat liver and bile duct cancers.

I have published more than 300 articles in top medical journals to share what I’ve learned with other doctors around the world. These include the New England Journal of Medicine, Lancet Oncology, Journal of Clinical Oncology, JAMA Oncology, Nature, Cell, and Cancer Discovery.

I serve on national and international committees that help decide the best ways to treat cancer. My research and training have been supported by grants from the American Society of Clinical Oncology, the National Comprehensive Cancer Network, the American Association for Cancer Research, the Howard Hughes Medical Institute, and the National Institutes of Health.

I am also passionate about making it easier for patients to join clinical trials, which are studies that test new treatments. At MSK, I lead a committee that makes sure all medical research is done safely and fairly for our patients. I am also part of other executive committees that work to improve how clinical trials are conducted. 

What I Do at MSK

I'm a gastrointestinal (GAS-troh-in-TES-tih-nul) medical oncologist, which is a cancer doctor who specializes in gastrointestinal (GI) cancers. This includes anal, colorectal, esophageal, gastric (stomach), liver, and pancreatic cancers. We also treat GI stromal tumors and neuroendocrine tumors.

I'm an early drug development specialist, which is a scientist who tests new drugs to treat cancer. I have special training in research studies, also known as clinical trials.

  • Associate Attending Physician
Areas of Expertise

Conditions I Treat

  • Liver cancer and conditions
  • Bile duct cancer (cholangiocarcinoma)
  • Gallbladder cancer
  • Pancreatic cancer
  • Gastrointestinal cancers and conditions

My Specialties

  • Immunotherapy
  • Targeted therapy
  • Early drug development
  • Clinical trials
Education & Honors

Education

  • MD, Albert Einstein College of Medicine

Residencies

  • Internal Medicine, NewYork-Presbyterian Hospital

Fellowships

  • Oncology/Hematology, Memorial Sloan Kettering Cancer Center

Board Certifications

  • Internal Medicine
  • Medical Oncology

Awards and Honors

  • Castle Connolly: Top Doctor (2025-2026)
  • Doctor of Distinction, WAG Magazine (2021)
  • LRP Award, National Institutes of Health (2013-2015)
  • Ruth L. Kirschstein National Research Service Award, National Institutes of Health (2012-2013)
  • Young Investigator Award, American Society of Clinical Oncology (2011-2012)
  • Alpha Omega Alpha Honor Medical Society (2007)

Insurance Information

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

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Contact and Location

Office Phone
Location
New York, NY
West Harrison, NY
Rockefeller Outpatient Pavilion
160 East 53rd Street New York NY 10022
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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.

See all Early Drug Development Service doctors

See all Gastrointestinal Oncology Service doctors

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.

Search clinical trials

Research and Publications

Publications on PubMed

Visit PubMed for a full listing of Dr. Harding’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.

See all on PubMed

Disclosures

Members of the MSK Community 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. These activities outside of MSK further our mission, provide productive collaborations, and promote the practical application of scientific discoveries.

MSK requires doctors, faculty members, and leaders 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. Not all disclosed interests and relationships present conflicts of interest. MSK reviews all disclosed interests and relationships to assess whether a conflict of interest exists and whether formal COI management is needed.

James J. Harding discloses the following relationships and financial interests:

  • Amgen
    Professional Services and Activities
  • AstraZeneca
    Professional Services and Activities
  • Boehringer Ingelheim
    Professional Services and Activities
  • Bristol-Myers Squibb
    Professional Services and Activities
  • Jazz Pharmaceuticals
    Professional Services and Activities
  • Merck & Co Inc.
    Professional Services and Activities
  • RayzeBio, Inc.
    Professional Services and Activities
  • Servier
    Professional Services and Activities

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, 2024 through disclosure submission in spring 2025). 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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