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Pictured: Neil Iyengar

Neil M. Iyengar, MD

Breast Medical Oncologist

4.8 | 145 reviews

Areas of Expertise

Conditions I Treat

  • Breast cancers and conditions

My Specialties

  • Healthy lifestyle changes
  • Integrative medicine
  • Clinical trials
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Dr. Iyengar's Office Information
Languages: English
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Get to Know Me

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.

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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.

What I Do at MSK

A breast medical oncologist is a cancer doctor who specializes in breast cancer.

  • Associate Attending Physician
Areas of Expertise

Conditions I Treat

  • Breast cancers and conditions

My Specialties

  • Healthy lifestyle changes
  • Integrative medicine
  • Clinical trials
Education & Honors

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

Awards and Honors

  • Chemotherapy Foundation Symposium Oncology Hero Award, Physicians Education Resource (2023)
  • 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

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 states outside of NY/NJ

In Network Coverage Type
HMO, EPO PPO, POS

See updates

Blue Cross Blue Shield Federal Employee Program

In Network Coverage Type
HMO, PPO

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.

Make an Appointment

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Current Patients
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Contact and Location

Dr. Iyengar sees patients at one location.

Office Phone
Location
New York, NY
Evelyn H. Lauder Breast Center
300 East 66th Street Floors 1 - 4 New York NY 10065
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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.

See all GCDI Participating Faculty doctors

See all Breast Medicine 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. 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 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.

4.8 145 reviews

  • 4.8 Provider's Explanations Easy to Understand
  • 4.8 Trusts Provider with Care
  • 4.9 Provider Listened Carefully
  • 4.8 Likelihood of Recommending Provider
Mar 6, 2025

I always feel heard and cared for by my team at SK

Feb 20, 2025

I understand how difficult it is to be an oncologist and stay on schedule; still, I waited more than 2 hours to be seen. Then, when I was sent to the lab for blood work, it was never called in; the lab didn't know what tests the Dr. needed. I ended up waiting another hour for the lab to receive directions and the lab never received them. It ended up being a huge waste of time and I have to return to MSK, still, for the bloodwork; I would appreciate better attention to this kind of detail moving forward.

Feb 20, 2025

What you did great was he's a warm-hearted, wonderful doctor who cares about his patients. The only thing was the hour and three-quarter wait was difficult for me. That's all.

Feb 13, 2025

Dr. Iyengar is terrific, but I have real big questions about his staff or else something about him communicating through the portal. Almost every time I've tried to really get information through the, you know, talk to them through the portal, I haven't, it's taken days and days and days for them to respond and then they seem to kind of forget. And even when I went there for my meeting with him, nobody told us, we waited for three hours and the last hour was in the exam room and nobody from the staff came and explained that he was still with another patient and we thought he had left at one point and were thinking of going home. So I think the staff, there's something wrong with the way that the staff is communicating with patients and or with him or he with them. I don't know what it is, but it's extremely different from every other doctor I've had at Sloan Kettering.

Feb 13, 2025

He listens to pt.concern and explains or discuss solutions at pt's level of understanding,He has a good bedside manner,compassionate and always wears a smile,very optimistic.a great asset to your institution.

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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.

Neil M. Iyengar discloses the following relationships and financial interests:

  • AstraZeneca
    Professional Services and Activities
  • Becton, Dickinson and Company
    Professional Services and Activities
  • Novartis
    Professional Services and Activities
  • Pfizer, Inc.
    Professional Services and Activities
  • Seagen
    Professional Services and Activities
  • TerSera Therapeutics LLC
    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.


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