Mohammad Ali Abbass, MD, MPH
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Areas of Expertise
Conditions I Treat
- Colon cancer
- Rectal cancer
- Anal cancer
My Specialties
- Colorectal surgery
- Genetics
Get to Know Me
I am a colorectal surgeon who has special training in treating people with the following types of cancers:
- Colon cancer
- Rectal cancer
- Anal cancer
- Small intestine cancer
- Hereditary colorectal cancer syndromes
- Appendiceal (appendix) cancer
I see patients at Memorial Hospital in New York City and at Memorial Sloan Kettering Nassau on Long Island.
I am an expert in minimally invasive surgery techniques as well as robotic surgery and open surgery. I see people who have a genetic predisposition to cancer, meaning that they have genes that put them at a higher risk for cancer. This includes people with Lynch syndrome or Familial adenomatous polyposis (FAP), an inherited disorder that causes colon and rectal polyps and cancer.
I am the first in my family to become a doctor. I chose a career in medicine because of the opportunity to take care of people. When I meet with a patient, I understand that it is a vulnerable time in their life. It is a privilege to help them navigate this difficult time and come up with surgical solutions that fit their need and help achieve the best results. My goal is to make sure that the patient receives the best treatment while maintaining their quality of life.
I am passionate about cancer prevention. I am involved in national clinical trials where we study how certain interventions or medications can lower the risk of cancer in the future. My research focuses on understanding the role genes play in causing cancer, how tumors progress, and studying genetic makeup in families that have cancer.
When I am not seeing patients, I enjoy exercising, spending time with my two young children, and reading biographies and non-fiction books.
I'm a colorectal (KOH-loh-REK-tul) surgeon, which is a doctor with special training in surgery on the colon and rectum.
I'm a clinical geneticist, which is a scientist with special training in diagnosing and treating genetic problems. We can help explain your risk of getting a genetic condition that's passed on from parents to children.
- Assistant Attending Physician
- Co-Lead, Inherited GI
Conditions I Treat
- Colon cancer
- Rectal cancer
- Anal cancer
- Small intestine cancer
- Appendiceal (appendix) cancer and conditions
- Hereditary colorectal cancer
My Specialties
- Colorectal surgery
- Genetics
Education
- MD, Faculty of Medicine at Damascus University, Syria
- MPH, Feinberg School of Medicine, Northwestern University
Residencies
- General Surgery Internship, University of Southern California
- General Surgery Residency, Cleveland Clinic Foundation
Fellowships
- Colorectal Surgery
- Cleveland Clinic Foundation
- Hereditary Colorectal Cancer and Cancer Genetics, Cleveland Clinic Foundation
Board Certifications
- American Board of Colorectal Surgery
- American Board of Surgery
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
PPO, HMO
In Network Coverage Type
HMO, PPO
In Network Coverage Type
HMO
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, EPO, HMO
In Network Coverage Type
State Government
In Network Coverage Type
State Government
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
In Network Coverage Type
PPO, HMO
In Network Coverage Type
HMO
In Network Coverage Type
PPO
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
In Network Coverage Type
PPO
In Network Coverage Type
State Government
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
In Network Coverage Type
PPO EPO
In Network Coverage Type
HMO
In Network Coverage Type
PPO
In Network Coverage Type
EPO
In Network Coverage Type
EPO
In Network Coverage Type
TBD
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)
In Network Coverage Type
Supplemental
In Network Coverage Type
PPO/OAP
In Network Coverage Type
PPO, POS, EPO, HMO
In Network Coverage Type
HMO/EPO
In Network Coverage Type
PPO, EPO
In Network Coverage Type
State Government
In Network Coverage Type
PPO, POS, HMO
In Network Coverage Type
PPO, HMO
In Network Coverage Type
PPO, POS
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.
Make an Appointment
Contact and Location
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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.
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
Visit PubMed for a full listing of Dr. Abbass’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
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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.
Mohammad Ali Abbass 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 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 ecoi@mskcc.org.