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Pictured: Geoffrey Ku

Geoffrey Y. Ku, MD

Gastrointestinal Medical Oncologist & Cellular Therapist

4.9 | 164 reviews

Areas of Expertise

Conditions I Treat

  • Gastrointestinal cancers and conditions
  • Esophageal cancers and conditions
  • Stomach (gastric) cancer

My Specialties

  • Chemotherapy
  • Immunotherapy
  • CAR T-cell therapy
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Dr. Ku's Office Information
Languages: English
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Get to Know Me

I am a medical oncologist who cares for people with cancer in the gastrointestinal tract, including:

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I graduated from the University of Pennsylvania School of Medicine. I completed an internal medicine residency at NewYork-Presbyterian Hospital at Weill Cornell, followed by a medical oncology fellowship at Memorial Sloan Kettering Cancer Center (MSK). I also spent an additional year at the Ludwig Center for Cancer Immunotherapy at MSK. My research in that time focused on translational correlative assays for the then new field of immunotherapy.

Now, my research focuses on developing new treatments for people with esophageal and gastric cancers. I am interested in exploring the combination of chemotherapy and radiation to treat esophageal cancer. I am also investigating cellular therapy, immunotherapy, and targeted therapies both to cure and to minimize the symptoms of cancer.  

I feel truly privileged to be at MSK. It is a unique and empowering experience to work at an institution whose sole focus is the treatment of cancer and the exploration of ways to improve cancer therapy. We attract staff members from all over the world; all of us have the same focus and dedication to providing expert cancer care.

On a personal note, my team and I strive to treat each patient as an individual. We care for our patients in the same way that we would want our dearest family members and friends to be cared for. I recognize that I am meeting patients and their families at a time of great physical and emotional vulnerability and do my best to uphold the trust and confidence they have in us.

I am currently Head of the Esophagogastric Section in the Gastrointestinal Oncology Service. Since 2020, I have also held an appointment on the Cellular Therapy Service, where we are investigating novel cellular therapies, such as chimeric antigen receptor (CAR) T cell therapy.

Outside of MSK, I have served as a member of the Gastrointestinal Non-Colorectal Cancer Track for the Scientific Program Committee of the American Society of Clinical Oncology (ASCO). I was privileged to serve as the Track Leader for 2015–2016. I am currently a member of the National Cancer Institute’s (NCI’s) Esophagogastric Task Force and NRG Oncology’s Gastrointestinal Non-Colorectal Cancer Core Committee. I was also recently part of a panel organized by the Society for Immunotherapy of Cancer (SITC) to help develop guidelines for the use of immunotherapy in gastrointestinal cancers.

What I Do at MSK

A gastrointestinal (GAS-troh-in-TES-tih-nul) medical oncologist is a cancer doctor who specializes in gastrointestinal (GI) cancers. This includes anal, colorectal, esophageal, gastric (stomach), liver, and pancreatic cancers, as well as GI stromal tumors and neuroendocrine tumors.

A cellular therapy specialist is a doctor with special training in using cell therapies to treat health conditions such as cancer. Therapies can include chimeric antigen receptor (CAR) T cell therapy.

  • Associate Attending Physician
Areas of Expertise

Conditions I Treat

  • Gastrointestinal cancers and conditions
  • Esophageal cancers and conditions
  • Stomach (gastric) cancer
  • Colon cancer
  • Rectal cancer
  • Pancreatic cancer

My Specialties

  • Chemotherapy
  • Immunotherapy
  • CAR T-cell therapy
  • Targeted therapy
Education & Honors

Education

  • MD, University of Pennsylvania School of Medicine

Residencies

  • NewYork-Presbyterian Hospital/Weill Cornell Medical Center

Fellowships

  • Memorial Sloan Kettering Cancer Center

Board Certifications

  • Medical Oncology

Awards and Honors

  • Castle Connolly: America’s Top Doctor (2025)
  • Castle Connolly: Top AAPI Doctor (2024)
  • Castle Connolly: America’s Top Doctor (2024)
  • Top Doctors New York Metro Area, Castle Connolly (2023)
  • Castle Connolly: America's Top Doctors (2023)

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.

Aetna

In Network Coverage Type
HMO, EPO PPO, POS, Transplant

Aetna Medicare Advantage (MTA and NYC retirees only)

In Network Coverage Type
PPO

Anthem BCBS and other BCBS licensee plans

In Network Coverage Type
PPO, POS, EPO, HMO

See updates

Anthem BCBS Health Plus

In Network Coverage Type
HMO

See updates

Blue Cross Blue Shield Federal Employee Program

In Network Coverage Type
HMO, PPO

See updates

Blue Cross Blue Shield states outside of NY/NJ

In Network Coverage Type
HMO, EPO PPO, POS

See updates

Carrum Health

In Network Coverage Type
Supplemental

Cigna

In Network Coverage Type
PPO, POS, HMO

Connecticare

In Network Coverage Type
POS, EPO, HMO

First Health

In Network Coverage Type
PPO

Straight NJ Medicaid

In Network Coverage Type
State Government

Straight NY Medicaid

In Network Coverage Type
State Government

Emblem

In Network Coverage Type
PPO, POS, EPO, HMO

Offers a qualified health plan from the Health Insurance Marketplace. Call Emblem to learn more.

Emblem Essential

In Network Coverage Type
HMO

Emblem Medicare Advantage (Medicare Choice PPO Network and VIP Prime Network Only)

In Network Coverage Type
PPO, HMO

Empire Essential

In Network Coverage Type
HMO

Empire Plan / NYSHIP (Blue Cross/UnitedHealthcare split plan)

In Network Coverage Type
PPO

See updates

Fidelis

In Network Coverage Type
HMO, EPO

Offers a qualified health plan from the Health Insurance Marketplace. Call Fidelis to learn more.

Fidelis Managed Medicaid & HARP

In Network Coverage Type
HMO

Fidelis Medicare Advantage

In Network Coverage Type
HMO

Healthfirst

In Network Coverage Type
EPO, HMO, PPO, POS

Offers a qualified health plan from the Health Insurance Marketplace. Call Healthfirst to learn more.

Healthfirst Managed Medicaid

In Network Coverage Type
HMO

Healthfirst Medicare Advantage

In Network Coverage Type
HMO, PPO

Healthsmart

In Network Coverage Type
PPO EPO

Horizon Blue Cross Blue Shield New Jersey (HMO)

In Network Coverage Type
HMO

See updates

Horizon Blue Cross Blue Shield New Jersey (PPO)

In Network Coverage Type
PPO

See updates

Horizon Blue Cross Blue Shield New Jersey Omnia Tier I (EPO)

In Network Coverage Type
EPO

See updates

Horizon Blue Cross Blue Shield New Jersey Omnia Tier II (EPO)

In Network Coverage Type
EPO

See updates

Horizon Medicare Advantage

In Network Coverage Type
PPO, HMO

Husky CT Medicaid

In Network Coverage Type
State Government

Magnacare

In Network Coverage Type
PPO, POS, EPO

Medicare Part A&B (traditional Medicare)

In Network Coverage Type
Federal Government

Metroplus

In Network Coverage Type
HMO

City Employee Health Plans (Gold and Gold Care)

Multiplan/Beech Street/PHCS

In Network Coverage Type
Supplemental

MVP

In Network Coverage Type
PPO/OAP

Non-Participating Plans with Out of Network Benefits

In Network Coverage Type
PPO, POS, EPO, HMO

NYC Medicare Advantage Plus for City Employees

In Network Coverage Type
TBD

Oscar

In Network Coverage Type
HMO/EPO

Oxford

In Network Coverage Type
PPO, EPO

World Trade Center Health Program (WTC)

In Network Coverage Type
State Government

Qualcare

In Network Coverage Type
PPO, POS, HMO

Tricare

In Network Coverage Type
PPO, HMO

UMR

In Network Coverage Type
PPO, POS

United Healthcare

In Network Coverage Type
PPO, POS, HMO

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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Current Patients
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Contact and Location

Dr. Ku sees patients at two locations.

Office Phone
Location
New York, NY
Rockefeller Outpatient Pavilion
160 East 53rd Street New York NY 10022
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David H. Koch Center for Cancer Care at Memorial Sloan Kettering Cancer Center
530 East 74th Street New York NY 10021
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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 Cellular Therapy Service doctors

See all Gastrointestinal Oncology Service doctors

Clinical Trials

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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

Research and Publications

Publications on PubMed

Visit PubMed for a full listing of Dr. Ku’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

Patient Reviews

Your trust is our main concern

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

4.9 164 reviews

  • 4.9 Provider's Explanations Easy to Understand
  • 4.9 Trusts Provider with Care
  • 4.9 Provider Listened Carefully
  • 4.9 Likelihood of Recommending Provider
Mar 7, 2025

We've met Dr Ku twice & we couldn't have asked for a better experience, especially considering the bad news we received.

Mar 4, 2025

Thank you Dr Ku!

Mar 4, 2025

rollout of your new computer system has been poor.

Feb 21, 2025

Was very polite and very nice nurses and all doctors are very good to answer all my questions. Thank you. Bye.

Feb 11, 2025

I only had to get the 2 day chemo travel pack removed today . On the 4th floor in Building 160 East Lex. All those. NURSES are kind, caring and help in anyway they can!. It's great that they have good medical knowledge.. often answering in detail ! God Bless them all.

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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.

Geoffrey Y. Ku discloses the following relationships and financial interests:

  • Astellas
    Professional Services and Activities
  • AstraZeneca
    Professional Services and Activities
  • Bayer
    Professional Services and Activities
  • Bristol-Myers Squibb
    Professional Services and Activities
  • I-Mab Biopharma
    Professional Services and Activities
  • Jazz Pharmaceuticals
    Professional Services and Activities
  • Merck & Co Inc.
    Professional Services and Activities
  • Zymeworks Inc.
    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, 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.


View all disclosures