Publications:33
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Accepting New Patients
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- Treats Adults
- Video Visit Available
- Accepting New Patients
Gagan Sahni, MBBS
Internal Medicine, Cardiovascular Disease (Heart Disease)
About Me
Gagan Sahni MD, FACC, FACP, FIC-OS is currently Professor of Medicine and Cardiovascular diseases at the Icahn School of Medicine , Mount Sinai Hospital, NY . She is also the Director of Cardio- Oncology and Inpatient Cardiology Consult services and is one of the few physicians in the world that has been awarded the distinction of Fellow of IC-OS [International Cardio-Oncology Society] in recognition of her outstanding contributions to the field of cardiovascular care in cancer patients.
Dr. Sahni does consultations on patients referred nationwide and internationally for her expertise in Cardio-oncology which specializes in prevention, risk reduction, and treatment of heart disease in cancer patients and cancer survivors, in both the inpatient and outpatient setting . She has been widely published in high-impact peer reviewed journals, has written 6 book chapters on Cardio-Oncology related topics, is an active clinical researcher with several ongoing IRB approved cardio-oncology research studies, is co-investigator in a NIH funded study on Modeling Best Approaches for Cardiovascular Disease prevention in Cancer Survivors and has mentored several young physicians in the field . She has been featured in Time Magazine, Cardiology Today , New York Magazine and New York Times as an expert in Cardio-Oncology and has helped develop institution wide protocols for early detection and monitoring of cardiotoxicity due to various cancer treatments including chemotherapy, radiation therapy and immunotherapy .
The Cardio-Oncology Program at The Mount Sinai Hospital, under the directorship of Gagan Sahni, MD, was granted the status of “Gold Center of Excellence“ in 2022. This is the highest designation of certification from the International Cardio-Oncology Society (IC-OS), the largest international platform for physicians and nurse practitioners dedicated to cardiovascular care of cancer patients. Mount Sinai’s Cardio-Oncology Program is the first in New York State to be awarded the coveted Gold status as a Cardio-Oncology Center of Excellence by IC-OS.
Dr. Gagan Sahni has also been recognized by Castle Connolly as one of "America's Top Doctors” in 2018 ,2019, 2020, 2021, 2022, 2023, 2024 and 2025 and has been featured in New York Magazine Top Doctors 2021- 2024. She was also included in the exclusive Top AAPI [ Asian American & Paacific Islander ] Doctors list in 2023 and 2024 and has received the Exceptional Women in Medicine Award by Castle Connolly from 2019 to 2025.
Dr. Sahni is one of the few cardiologists in the world to be certified internationally in Cardio-Oncology by the International Cardio-Oncology Society [ IC-OS] , and is a Fellow of IC-OS [ FIC-OS] in addition to being a Fellow of the American College of Cardiology [ FACC] and a Fellow of the American College of Physicians [FACP]. She is also board certified by the ABIMin Internal Medicine and Cardiovascular Diseases with prior board certifications in Nuclear Cardiology and Echocardiography.
She is on the Board of Directors of the Livestrong Foundation, a philanthrophic organization that supports cancer survivors and surviourship programs.
Dr. Sahni sees patients at The Mount Sinai Hospital in the main Guggenheim Pavilion at the Lauder Ambulatory Center. She is fluent in Hindi, Urdu , Punjabi and Spanish.
For more information about Cardio-Oncology services provided by Dr. Sahni and patient testimonials please visit: https://www.mountsinai.org/care/heart/services/cardio-oncology
The state of Florida requires out-of-state professionals who are registered to provide telehealth services to display a hyperlink to the Florida Department of Health telehealth web page. This allows Florida patients who are receiving medical care by telehealth to confirm the provider’s licensure and Florida registration.
Language
English, Indian (Hindi), Spanish
Position
PROFESSOR | Medicine, Cardiology
Hospital Affiliations
- Mount Sinai Queens
- The Mount Sinai Hospital
Clinical Focus
- Acute Coronary Syndrome
- Aortic Disease
- Arrhythmia Diagnostic
- Arrhythmias
- Bradycardia
- Cardiac Tumor
- Cardiology Second Opinion
- Cardiomyopathy
- Cardiovascular Disease
- Cardiovascular Distress
- Chest Pain
- Coronary Artery Disease
- ECG / EKG
- Echocardiogram
- Endocarditis
- General Cardiology
- Heart Attack/Acute Coronary Syndrome
- Heart Disease
- Hyperlipidemia/High Cholesterol
- Hyperthropic Cardiomyopathy
- Mitral Valve Disease
- Pericarditis
- Peripheral Vascular Disease
- Premature Ventricular Beats
- Stroke
- Tachycardia
- Valvular Heart Disease
Video
Education
MD, Aligarh Muslim University
Residency, Medical Oncology
All India Institute of Medical Sciences
Residency, Internal Medicine
Long Island College Hospital
Fellowship, Cardiovascular Disease
Mount Sinai Beth Israel
Certifications
American Board of Internal Medicine
Insurance Information
Accepted insurance may vary by the doctor’s office location. Please contact the office directly to obtain the most up-to-date insurance information.
- 1199 SEIU
- 32BJ Health Fund
- AETNA - Commercial
- AETNA - Medicare
- Amidacare Medicaid
- Anthem/Empire Blue Cross Blue Shield - Commercial
- Anthem/Empire Blue Cross Blue Shield - HealthPlus Medicaid
- CIGNA Healthcare
- Centivo
- Elderplan
- EmblemHealth - GHI-PPO
- EmblemHealth - HIP
- EmblemHealth - HIP-Medicaid
- EmblemHealth - HIP-Medicare
- Fidelis Health Care
- HealthFirst Medicaid
- HealthFirst Medicare
- Horizon NJ
- Magnacare-Health Care
- Medicare - NJ
- Medicare - NY
- Metroplus
- Multiplan PHCS
- NJ Medicaid
- NY Medicaid
- Oscar
- Oxford - Freedom and Liberty
- United Health Care - Commercial
- United Health Care - Empire Plan
- United Health Care - Oxford Care
- United Health Care - UMR Top Tier
- VNSNY Choice Medicare
- VNSNY Select Health Medicaid
- VillageCareMax
- WellCare Health Plan
Physicians who provide services at hospitals and facilities in the Mount Sinai Health System might not participate in the same health plans as those Mount Sinai hospitals and facilities (even if the physicians are employed or contracted by those hospitals or facilities).
Information regarding insurance participation and billing by this physician may be found on this page, and can also be obtained by contacting this provider directly. Because physicians insurance participation can change, the insurance information on this page may not always be up-to-date. Please contact this physician directly to obtain the most up-to-date insurance information.
Insurance and health plan networks that the various Mount Sinai Health System hospitals and facilities participate in can be found on the Mount Sinai Health System website.
Publications
Selected Publications
- A rare case of fulminant talquetamab-induced myocarditis presenting as a STEMI mimicker. Eric J. Kim, Sara Diaz Saravia, Gagan Sahni. Cardio-Oncology
- Cardiogenic shock in cancer: differences in use of temporary mechanical circulatory support, invasive hemodynamic assessment and patient outcomes. Sara Diaz Saravia, Vincent Torelli, Maninderjit Ghotra, Samuel Tan, Paulus Adinugraha, Marko Novakovic, Katharine Idrissi, Basera Sabharwal, Sean P. Pinney, Gagan Sahni, Matthew I. Tomey. Cardio-Oncology
- Late-Presenting Fulminant Immune Checkpoint Inhibitor Myocarditis Managed With Abatacept and Venoarterial Extracorporeal Oxygenation. Daniel S. Kikuchi, Edan Zitelny, Ashish Correa, Jonathan L. Halperin, Evan Leibner, Gregory W. Serrao, Gagan Sahni. JACC: Case Reports
Patient Experience Star Ratings and Comments
The Patient Experience Star Rating reflects our patients’ perception of how well their Mount Sinai provider communicated with them during an office visit. The Star Rating is based on patient responses to three questions on a patient experience survey, a standardized questionnaire sent to verified patients and distributed by a third party vendor, Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score.
Care Provider’s Explanation
4.9 out of 5
Care Provider’s Concern
4.9 out of 5
Likelihood to Recommend Care Provider
4.9 out of 5
Dr Sahni is one of the most knowledgeable cardiologist that I ever had the pleasure of being a patient. She is kind, compassionate, through, she was very clear in discussing my condition and treatment options and expectations. She is warm and very caring. I admire the fact that she knew my husband name when she entered the exam room. I did not feel like just another patient, she made me feel as an individual important patient
Top marks to Dr Sahni, 100%. She exhibits a perfect balance of professionalism, expert medical knowledge, coaching & friendliness.
Excellent
Industry Relationships
Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device, biotechnology companies, and other outside entities to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their outside financial relationships.
Below are financial relationships with industry reported by Dr. Sahni during 2025 and/or 2026. Please note that this information may differ from information posted on corporate sites due to timing or classification differences.
Board Service
- LIVESTRONG FOUNDATION
Mount Sinai’s faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.