Meet Clare Sun: Leukemia Specialist at MSK

Dr. Clare Sun treats chronic lymphocytic leukemia (CLL), small lymphocytic lymphoma, and Richter transformation at MSK Basking Ridge in New Jersey, using targeted therapy, immunotherapy, and clinical trials to match treatment to your unique disease.
Video Details
 Clare Sun

Clare Sun, MD

Leukemia Specialist

Areas of Expertise

Conditions I Treat

  • Chronic lymphocytic leukemia (CLL)
  • Small lymphocytic lymphoma (SLL)
  • Richter transformation

My Specialties

  • Clinical trials
  • Targeted therapy
  • Immunotherapy
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Dr. Sun's Office Information
Languages: English
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Get to Know Me

I’m a hematologist-oncologist with special training in the treatment of chronic lymphocytic leukemia (CLL) and small lymphocytic lymphoma (SLL). I also treat people for Richter Transformation, a rare complication where chronic lymphocytic leukemia (CLL) turns into an aggressive lymphoma.

I see patients at Memorial Sloan Kettering Basking Ridge in New Jersey. I work closely with each patient to develop a care plan that fits their specific goals, preferences, and lifestyle. My approach combines compassion with the latest scientific research, including access to new clinical trials.

A big part of my work involves clinical trials that explore promising new ways to treat blood cancers. These studies help us improve treatment results and give patients more options, especially when standard treatments may not be enough. I take the time to clearly explain the potential benefits and side effects of each treatment. This helps my patients make informed decisions about their care.

My passion for cancer care and research is personal, and my experience fuels my dedication for helping others affected by cancer. I strongly believe in educating patients and their families about the nature of their disease, what to expect, and how we can manage the road ahead together. Every patient’s journey is unique, and I aim to offer both excellent care and genuine support.

Outside of work, I’m a busy mom of two, and I cherish the time I spend with my family. Whether we’re traveling together or enjoying a quiet family movie night, those moments keep me grounded and remind me why this work matters so much.

What I Do at MSK

I’m a leukemia specialist, which is a doctor with special training in diagnosing and treating leukemia (loo-KEE-mee-uh). This cancer starts in tissue that forms blood, such as bone marrow.

  • Associate Attending Physician
Areas of Expertise

Conditions I Treat

  • Chronic lymphocytic leukemia (CLL)
  • Small lymphocytic lymphoma (SLL)
  • Richter transformation
  • Leukemia

My Specialties

  • Clinical trials
  • Targeted therapy
  • Immunotherapy
This list shows some key areas of focus, but it may not cover all expertise. When making an appointment, you will be matched with the best healthcare provider for your needs.
Education & Honors

Education

  • University of British Columbia

Residencies

  • Internal Medicine, Loyola University Medical Center

Fellowships

  • Hematology and Medical Oncology, National Institutes of Health

Board Certifications

  • Hematology, Medical Oncology

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.

Learn more about the insurance plans that participate with MSK.

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.

Health plans can change at any time. Call the number on the back of your insurance card to see what your plan covers. Make sure it covers the MSK location where you’ll get care.

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

Make an Appointment

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New Patients
Scheduling an appointment is easy. Click or call 646-497-9154— we’re available 24 hours a day, 7 days a week
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Current Patients
Request an appointment by calling your Care Team or messaging them in MSK MyChart.

Contact and Location

Office Phone
Location
Basking Ridge, NJ
Memorial Sloan Kettering Basking Ridge
136 Mountain View Boulevard Basking Ridge NJ 07920
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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 Leukemia 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. Sun’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.

Clare Sun discloses the following relationships and financial interests:

  • AbbVie
    Professional Services and Activities (Uncompensated)
  • AstraZeneca
    Professional Services and Activities (Uncompensated)
  • Octapharma
    Professional Services and Activities
  • P\S\L Group
    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, 2025 through disclosure submission in spring 2026). 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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