Gagan Sahni
Video Visit Available
Accepting New Patients
Mount Sinai Verified Doctors IconMount Sinai DoctorsTreats Adults

Gagan Sahni, MBBS

Internal Medicine, Cardiovascular Disease (Heart Disease)

White Phone Icon212-427-1540
Calender Icon
Book an Appointment
White Right Arrow

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 whichspecializes in prevention, risk reduction, prevention 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. 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 and 2024 and has been featured in New York Magazine Top Doctors 2021, 2022 and 2023. She recently had the distinstion of being included in exclusive Top AAPI [ Asian American & Paacific Islander ] Doctors list in 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] anda Fellow of the American College of Physicians [FACP]. She is also board certified by the ABIM in 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:




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