Gagan Sahni
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Gagan Sahni, MBBS

Cardiovascular Disease (Heart Disease), Internal Medicine, Cardiology (Heart)

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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 special expertise in cardio-oncology i.e. treating 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. Only 22 cardio oncology programs nationwide and 31 worldwide had been awarded this recognition acknowledging exceptional cardiovascular care of oncology patient in 2022.
Dr. Gagan Sahni has also been  recognized by Castle Connolly as one of "America's Top Doctors” in 2018 ,2019, 2020, 2021, 2022, 2023 in the field of Cardiovascular disease , awarded the title of Exceptional Women In Medicine: 2019, 2020, 2021, 2022, 2023 and also included in the List of Top AAPI [ Asian American & Pacific Islander ] Doctors 2023 .
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 isalso board certified by the ABIM in Internal Medicine and Cardiovascular Diseases with prior board certifications in Nuclear Cardiology and Echocardiography.
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:


English, Indian (Hindi), Spanish
PROFESSOR | Medicine, Cardiology
Hospital Affiliations
  • The Mount Sinai Hospital