Benoit Rousseau, MD, PhD
We post reviews for MSK healthcare providers who have at least 30 patient experience surveys completed. If you do not see reviews for a provider, it may be because they do not yet have enough survey responses, or the provider may not be part of the group of healthcare providers included in the survey.
Only outpatient providers are included in the survey. Healthcare providers who only work in the hospital or in urgent care are not included in the survey. Pathologists or researchers who do not provide direct care to patients do not have reviews.
Areas of Expertise
Conditions I Treat
- Colon cancer
- Rectal cancer
- Colorectal cancer and conditions
Get to Know Me
I’m a medical oncologist with special training in treating people with gastrointestinal cancers. These are cancers that affect the digestive system, and include:
- Colorectal cancer
- Small bowel cancer
- Anal cancer
- Appendiceal cancer
- Gastrointestinal neuroendocrine tumors
I have a special focus on young onset gastrointestinal cancers, which are diagnosed in people under the age of 50. I’m also an expert in hereditary cancers, including Lynch syndrome and polyposis syndromes.
I see patients at Memorial Hospital, the main hospital at Memorial Sloan Kettering Cancer Center (MSK) and also at MSK Westchester. I work closely with patients and their families to develop treatment plans tailored to their needs. When appropriate, I offer them access to the latest clinical trials.
As a physician-scientist, my research combines cancer genetics and immunology to better understand why tumors develop. I also study how cancers interact with the immune system, and why gastrointestinal cancers are becoming more common in younger adults.
I work to bring discoveries from the laboratory to clinical trials and new treatment options for patients.
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.
- Assistant Attending Physician
Conditions I Treat
- Colon cancer
- Rectal cancer
- Colorectal cancer and conditions
- Anal cancer
- Appendiceal (appendix) cancer and conditions
- Small bowel tumors and polyps
- Gastrointestinal neuroendocrine tumors
- Hereditary cancers
Education
- MD, Sorbonne University Medical School
- PhD, Paris Est University
- Bachelor of Science & Master of Science, Ecole Normale Superieure Paris Saclay
Residencies
- Medical Oncology, Paris hospitals, Sorbonne University
Fellowships
- Paris Est University, Henri Mondor Hospital
Awards and Honors
- Names Family Foundation Award (2026)
- Dr. Steve Rosenberg Scholar Award, Society of Immunotherapy of Cancer (2024)
- Department of Defense, Career Development Award (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.
In Network Coverage Type
HMO, EPO PPO, POS, Transplant
In Network Coverage Type
PPO
In Network Coverage Type
PPO, POS, EPO, HMO
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
HMO, PPO
In Network Coverage Type
HMO, EPO PPO, POS
In Network Coverage Type
Supplemental
In Network Coverage Type
PPO, POS, HMO
In Network Coverage Type
POS, HMO
In Network Coverage Type
PPO, POS, EPO, HMO
Offers a qualified health plan from the Health Insurance Marketplace. Call Emblem to learn more.
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO, HMO
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO
This is a dual payer plan, which means 2 health insurance companies share this plan. MSK providers are out-of-network with UnitedHealthcare.
In Network Coverage Type
HMO, EPO
Offers a qualified health plan from the Health Insurance Marketplace. Call Fidelis to learn more.
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
HMO
In Network Coverage Type
PPO
In Network Coverage Type
EPO, HMO, PPO, POS
Offers a qualified health plan from the Health Insurance Marketplace. Call Healthfirst to learn more.
In Network Coverage Type
HMO
This plan is in-network at our New York sites only.
In Network Coverage Type
HMO, PPO
In Network Coverage Type
PPO EPO
In Network Coverage Type
HMO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
PPO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
EPO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
EPO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
PPO, HMO
Your plan may not cover visits to our New York sites. Please call the number on the back of your insurance card to see what your health plan covers.
In Network Coverage Type
State Government
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO, POS, EPO
In Network Coverage Type
Federal Government
In Network Coverage Type
HMO (City Employee Health Plans Gold and Gold Care Only)
In Network Coverage Type
Supplemental
In Network Coverage Type
PPO/OAP
In Network Coverage Type
PPO, POS, EPO, HMO
In Network Coverage Type
TBD
In Network Coverage Type
PPO, EPO
In Network Coverage Type
PPO, POS, HMO
In Network Coverage Type
State Government
This plan is in-network at our New York sites only.
In Network Coverage Type
PPO, HMO
In Network Coverage Type
PPO, POS
In Network Coverage Type
PPO, POS, HMO
In Network Coverage Type
State Government
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
Contact and Location
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.
Clinical Trials
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 trialsResearch and Publications
- Rousseau B, et al. The Duration of Immunotherapy for Mismatch Repair-Deficient Cancers. N Engl J Med. 2025 Feb 20;392(8):824-826. doi: 10.1056/NEJMc2409154. PubMed PMID: 39970404; PubMed Central PMCID: PMC12208649.
- Cercek A, Foote MB, Rousseau B, et al. Nonoperative Management of Mismatch Repair-Deficient Tumors. N Engl J Med. 2025 Jun 19;392(23):2297-2308. doi: 10.1056/NEJMoa2404512. Epub 2025 Apr 27. PubMed PMID: 40293177; PubMed Central PMCID: PMC12661660.
- Rousseau B, et al. PD-1 Blockade in Solid Tumors with Defects in Polymerase Epsilon. Cancer Discov. 2022 Jun 2;12(6):1435-1448. doi: 10.1158/2159-8290.CD-21-0521. PubMed PMID: 35398880; PubMed Central PMCID: PMC9167784.
- Rousseau B, Foote MB, et al. The Spectrum of Benefit from Checkpoint Blockade in Hypermutated Tumors. N Engl J Med. 2021 Mar 25;384(12):1168-1170. doi: 10.1056/NEJMc2031965. PubMed PMID: 33761214; PubMed Central PMCID: PMC8403269.
Visit PubMed for a full listing of Dr. Rousseau’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 PubMedPatient Reviews
Your trust is our main concern
We strive to keep reviews trustworthy, honest and fair. Learn more about our patient experience reviews.