
Neil M. Iyengar, MD
Breast Oncologist
Titles
Associate Attending Physician
Clinical Expertise
Breast Cancer; Exercise Oncology
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New Patient Appointments
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Dr. Iyengar accepts the following list of insurance providers. Select your insurance provider to see more details.
Payor Type: Commercial
In Network Coverage Type(s): HMO, EPO PPO, POS, Transplant
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): PPO
Payor Type: Commercial
In Network Coverage Type(s): HMO, PPO
Payor Type: Commercial
In Network Coverage Type(s): PPO, POS, EPO, HMO
Payor Type: Commercial
In Network Coverage Type(s): HMO, EPO PPO, POS
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): HMO
Payor Type: Commercial
In Network Coverage Type(s): Supplemental
Payor Type: Commercial
In Network Coverage Type(s): PPO, POS, HMO
Payor Type: Commercial
In Network Coverage Type(s): POS, EPO, HMO
Payor Type: Commercial
In Network Coverage Type(s): PPO, POS, EPO, HMO
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): HMO
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): PPO, HMO
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): PPO, HMO, DSN
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): HMO
Payor Type: Commercial
In Network Coverage Type(s): PPO
Payor Type: Commercial
In Network Coverage Type(s): HMO, EPO
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): HMO
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): HMO
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): PPO
Payor Type: Commercial
In Network Coverage Type(s): EPO, HMO, PPO, POS
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): HMO
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): HMO, PPO
Payor Type: Commercial
In Network Coverage Type(s): PPO EPO
Payor Type: Commercial
In Network Coverage Type(s): HMO
Payor Type: Commercial
In Network Coverage Type(s): PPO
Payor Type: Commercial
In Network Coverage Type(s): EPO
Payor Type: Commercial
In Network Coverage Type(s): EPO
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): PPO, HMO
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): State Government
Payor Type: Commercial
In Network Coverage Type(s): PPO, POS, EPO
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): State Government
Payor Type: Medicaid/Managed Medicaid
In Network Coverage Type(s): State Government
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): Federal Government
Payor Type: Commercial
In Network Coverage Type(s): Supplemental
Payor Type: Commercial
In Network Coverage Type(s): PPO/OAP
Payor Type: Other
In Network Coverage Type(s): PPO, POS, EPO, HMO
Payor Type: Medicare/Medicare Advantage
In Network Coverage Type(s): TBD
Payor Type: Commercial
In Network Coverage Type(s): HMO/EPO
Payor Type: Commercial
In Network Coverage Type(s): PPO, EPO
Payor Type: Commercial
In Network Coverage Type(s): State Government
Payor Type: Commercial
In Network Coverage Type(s): PPO, POS, HMO
Payor Type: Commercial
In Network Coverage Type(s): PPO, HMO
Payor Type: Commercial
In Network Coverage Type(s): PPO, POS
Payor Type: Commercial
In Network Coverage Type(s): PPO, POS, HMO
Contact and Location
- 646-888-4714 Office Phone
- Speaks English

Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offer many services, including screening, chemotherapy, and medical testing.
See all locationsAbout Me
Education
MD, University of Illinois at Chicago
Residencies
Internal Medicine - University of Chicago Medical Center
Fellowships
Oncology/Hematology - Memorial Sloan Kettering Cancer Center
Board Certifications
Internal Medicine; Medical Oncology
I am a medical oncologist and clinical investigator with a practice dedicated exclusively to the care of patients with breast cancer. As a member of our multidisciplinary team of specialists, I treat patients with an individualized and multifaceted approach based on cutting-edge technology and the most up-to-date research.
My practice is focused on providing patients with state-of-the-art care plans using advanced technologies and innovative strategies to treat breast cancer while also providing support for general well-being, such as nutrition and exercise. Ultimately, I am dedicated to providing clear communication and understandable information regarding standard therapies as well as new and exciting research options so that patients are empowered to make informed decisions about their care.
Read more
My research investigates the links between metabolic health and cancer. I work with a highly productive team composed of clinical and laboratory scientists at Memorial Sloan Kettering, Weill Cornell Medical College, and the Rockefeller University, where I hold a joint research position. Our team has established inflammation in the breast to be a key contributor to obesity-related breast cancers. As obesity rates are on the rise in the United States and worldwide, we are seeing an increase in obesity-related cancers. We have shown that inflammation in the fatty tissue of the breast and at other anatomic sites occurs in most obese and overweight individuals and even in some individuals who are normal weight. Therefore a key component of my research program is the development of clinical trials — including diets, exercise, and medications — that aim to prevent obesity-related cancers as well as improve outcomes in patients with fatty-tissue inflammation.
Awards and Honors
- Career Development Award, Conquer Cancer the ASCO Foundation
- Breast Cancer Research Foundation Investigator
- The Society of MSK Research Grant
- Young Investigator Award, Conquer Cancer the ASCO Foundation
- Breast Cancer Achievement Award, Lynn Sage Breast Cancer Symposium
- Young Investigator Award, Expedition Inspiration
- Merit Award, Conquer Cancer the ASCO Foundation
Colleagues
Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. I work closely with nurse practitioner Odessa M. Williams. We combine our expertise to provide comprehensive care to our patients at every step of their cancer journey.
Clinical Trials
- Clinical Trials Investigated by Dr. Iyengar
- A Phase I Study of Exercise Treatment with Standard Therapy for Metastatic Breast Cancer
- A Phase II Study of Evexomostat plus Eribulin for People with Triple-Negative Breast Cancer
- A Study of the Body's Response to Exercise and a Plant-Based Diet in Overweight Postmenopausal Women with Breast Cancer
- Preventing High Blood Sugar with Ketogenic or Low Carbohydrate Diets or Medication in People Being Treated for Metastatic Breast Cancer
Read more
- Clinical Trials Co-Investigated by Dr. Iyengar
- A Study Assessing the Effect of Aerobic Exercise on Cancer

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. Iyengar’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
At MSK, we’re committed to delivering the best care to every patient. We use feedback from our patients to continue to improve our care. We also post patient reviews online to help you make healthcare choices. Learn more about our patient experience reviews.
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.
Neil M. Iyengar discloses the following relationships and financial interests:
-
Excerpta Medica
Provision of Services -
Novartis
Provision of Services
-
Seattle Genetics
Provision of Services
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 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, 2021 through disclosure submission in spring 2022). 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].