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Gagan Sahni, MBBS

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Mount Sinai Doctors ?
    • Position
    • ASSOCIATE PROFESSOR | Medicine, Cardiology
    • Specialties
    • Cardiology
    • Cardiovascular Disease
    • Languages
    • Spanish
    • English
    • Indian (Hindi)
    • Hospital Affiliation
    • The Mount Sinai Hospital

Book an Appointment - Gagan Sahni, MBBS

Gagan Sahni MD, FACC, FACP graduated from J.N. Medical College in Aligarh, India with gold medals for highest scores in Ophthalmology, Pharmacology and highest overall score  in the Class of 1991 . She subsequently completed her residency in Internal Medicine at Long Island College Hospital, Brooklyn, a SUNY Downstate affiliate where she was also accepted responsibility for one year as Chief Resident of Internal Medicine. She received her fellowship training in Cardiovascular Diseases from Beth Israel Medical Center-Long Island College Hospitals NY, and was also Chief Cardiology Fellow in the final year. During her fellowship she presented several research abstracts at American College of Cardiology with the 2006 abstract on Impact of Heart Failure medications on incidence of Ventricular Arrhythmias being selected for the Young Investigators Award.



Dr. Sahni was subsequently an Attending and CCU Director at the Metropolitan College hospital with faculty appointment of Assistant Professor of Medicine  at New York Medical College [ NYMC] Valhalla from 2006-2009. She was also appointed Site Clerkship Director for Medical students from NYMC at Metropolitan Hospital mentoring and teaching third and fourth year medical students. She was awarded Teacher of the Year award by the graduating batch of 2009 NYMC medical students and Teacher of the Year Award by Internal Medicine Residents of Metropolitan Hospital in 2007 and 2009. She also had publications in the European Heart Journal and International Journal of Cardiology during this period.


Dr. Sahni joined the Cardiovascular Institute faculty at Mount Sinai in 2010 and has since been appointed Director of Cardiology Consult Services in July 2014 and is the Director of the first Cardio-Oncology at Mount Sinai established in May 2013. Her special clinical interests and expertise include Heart Disease in Cancer patients[ Cardio-Oncology ], Cardiac Amyloidosis,  Heart Disease in Pregnancy, Coronary Artery Disease, Preventive Cardiology, Women’s Heart Health and Cardiovascular Imaging.


Dr. Sahni is board certified by the ABIM in Internal Medicine and Cardiovascular Diseases with additional board certification in Nuclear Cardiology and Echocardiography.  She was awarded Fellowship in American College of Cardiology in 2008, Fellowship in American College of Physicians in 2009, and is a current member of the American Medical Association, American College of Cardiology, American College of Physicians, Women in Cardiology Committee of ACC, Vascular Biology Working Group and International Cardio-Oncology Society . She has received numerous popular awards such as People’s Choice award 2008-2012, and Most Compassionate Doctor 2012, 2014. Most recently she was awarded with "Top Clinical Performer" of the Mount Sinai outpatient Lauder Ambulatory Cardiology Center for 2018 based on patiient satisfaction surveys and other efficiency metrics. She was also recognized by Castle Connolly as "America's Top Doctors 2018" and "America's Top Doctors 2019" in the field of Cardiovascular disease in the New York area.


 Dr. Sahni sees patients at The Mount Sinai Hospital in the main Guggenheim Pavilion at the Launder Ambulatory Center. She is fluent in Spanish, Hindi, Urdu and Punjabi.  For more information about Cardio-Oncology services provided by Dr. Sahni please visit:


American Board of Internal Medicine

Clinical Focus

  • Acute Coronary Syndrome
  • Aortic Disease
  • Arrhythmia Diagnostic
  • Bradycardia
  • Cardiology Second Opinion
  • Cardiomyopathy
  • Cardiovascular Disease
  • Cardiovascular Distress
  • Chest Pain
  • 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


MBBS, Jawarharlal Nehru Medical College

Residency, Medical Oncology
All-India Institute of Med. Science

Residency, Internal Medicine
Long Island College Hospital (CLOSED)

Fellowship, Cardiovascular Disease
Beth Israel Medical Center


Spanish, English, Indian (Hindi)