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Allan Stewart

  • ASSOCIATE PROFESSOR Cardiovascular Surgery
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  • Thoracic Surgery


  • MD, New Jersey Medical School

  • Residency, General Surgery
    Hospital of University of Pennsylvania

  • Fellowship, Cardio-Thoracic Surg
    Columbia University


    About Allan S. Stewart, MD
    Allan S. Stewart, MD is Director of Aortic Surgery and Co-Director of the Valve Center in the Department of Cardiothoracic Surgery at The Mount Sinai Hospital, and also serves as Associate Professor in the Department of Cardiothoracic Surgery at Icahn School of Medicine at Mount Sinai. Dr. Stewart joined Mount Sinai in 2013.
    As an experienced cardiac surgeon, Dr. Stewart has performed more than 2,000 combined elective and emergency procedures in his career, including 1,000 heart valve operations. He specializes in the treatment of aortic valve disease through surgical aortic valve repair, aortic reconstruction, aortic valve-sparing surgery, aortic root replacement, aortic aneurysm repair, aortic dissection, transcatheter aortic valve replacement, and mechanical aortic valve replacement. Additionally, his clinical research focuses on creating and testing novel treatments and technologies for aortic valve repair and patient mechanical circulatory management during complex aortic surgery. He has published approximately 30 peer-reviewed research publications.
    As a heart surgeon, Dr. Stewart's goal is always to develop new ways to treat structural heart disease more minimally invasively, while increasing patient survival, improving patient outcomes, delivering more long-lasting, durable surgical results, while decreasing overall costs. Dr. Stewart pioneered a novel technique in stentless biological aortic root replacement. Also, Dr. Stewart developed a novel hybrid endovascular procedure for minimally invasively performing aortic repair, aortic replacement, and treating complex aortic aneurysms.
    Dr. Stewart is a member of American Association for Thoracic Surgery, Alpha Omega Alpha Honor Medical Society, American Heart Association, New York Society of Thoracic Surgery, Society of Thoracic Surgeons, American College of Surgeons, and National Marfan's Foundation. Since 2011, Dr. Stewart has been listed by Castle Connolly, Ltd. as one of "America's Top Doctors" and "Top Doctors: New York Metro Area," and also as one of New York Magazine's "Best Doctors."
    Previously, Dr. Stewart served as the Director of the Aortic Surgery Program and attending surgeon at NewYork-Presbyterian/Columbia and Assistant Professor in the Department of Surgery at Columbia University College of Physicians & Surgeons since 2005. Also, his fellowship training was completed at NewYork-Presbyterian/Columbia. He completed his internship training at the University of Pennsylvania School of Medicine and his residency training at the Hospital of the University of Pennsylvania. At the University of Medicine & Dentistry of New Jersey (UMDNJ)-Robert Wood Johnson School of Medicine Dr. Stewart received his medical degree. He is board certified in both ThoracicSurgery and Surgery.
    In addition, Dr. Stewart is an avid marathon runner and tri-athlete.

    Click to view Dr. Stewart's full CV.

    Learn more about the Aortic Surgery Program at Mount Sinai Heart, here.



  • 2012 -
    Young Professional Award
    American Heart Association

  • 2011 - 2013
    Best Doctors in New York
    Castle Connely

  • 2011 - 2013
    Best Doctors in America
    Castle Connelly

  • 2011 - 2013
    NY Magazine Best Doctors
    New York Magazine

  • 2011 - present
    Membership in our most prestigious society
    American Association of Thoracic Surgeons


Wang DY, Kelly LA, Richmond ME, Quinn TA, Cheng B, Spotnitz MD, Cabreriza SE, Naka Y, Stewart AS, Smith CR, Spotnitz HM. Feasibility of temporary biventricular pacing after off-pump coronary artery bypass grafting in patients with reduced left ventricular function. Texas Heart Institute journal / from the Texas Heart Institute of St. Luke's Episcopal Hospital, Texas Children's Hospital 2013; 40(4).

Russo MJ, Easterwood R, Williams MR, George I, Stewart AS. Aortic root and right ventricular outflow tract reconstruction using composite biological valved conduits after failed Ross procedure. The Annals of thoracic surgery 2011 Jun; 91(6).

Kurlansky PA, Argenziano M, Dunton R, Lancey R, Nast E, Stewart A, Williams T, Zapolanski A, Chang H, Tingley J, Smith CR. Quality, not volume, determines outcome of coronary artery bypass surgery in a university-based community hospital network. The Journal of thoracic and cardiovascular surgery 2012 Feb; 143(2).

Iribarne A, Russo MJ, Easterwood R, Yang J, Stewart AS. Designing a stentless valve conduit for use in a biological Bentall procedure. The Journal of heart valve disease 2011 Sep; 20(5).

Winchester R, Wiesendanger M, O'Brien W, Zhang HZ, Maurer MS, Gillam LD, Schwartz A, Marboe C, Stewart AS. Circulating activated and effector memory T cells are associated with calcification and clonal expansions in bicuspid and tricuspid valves of calcific aortic stenosis. Journal of immunology (Baltimore, Md. : 1950) 2011 Jul; 187(2).

Mavroudis CD, Molina E, Stewart A. Cerebral protection for aortic arch surgery: hybrid approach. Seminars in thoracic and cardiovascular surgery 2012; 24(4).

Ben-Gal Y, Stone GW, Smith CR, Williams MR, Weisz G, Stewart AS, Takayama H, Genereux P, Argenziano M. On-pump versus off-pump surgical revascularization in patients with acute coronary syndromes: analysis from the Acute Catheterization and Urgent Intervention Triage Strategy trial. The Journal of thoracic and cardiovascular surgery 2011 Aug; 142(2).

Yang JA, Neely RC, Stewart AS. Modified bentall procedure with composite biologic grafts. Journal of cardiac surgery 2013 Nov; 28(6).

Industry Relationships

Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device and biotechnology companies 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 relationships with such companies.

Dr. Stewart did not report having any of the following types of financial relationships with industry during 2015 and/or 2016: consulting, scientific advisory board, industry-sponsored lectures, service on Board of Directors, participation on industry-sponsored committees, equity ownership valued at greater than 5% of a publicly traded company or any value in a privately held company. Please note that this information may differ from information posted on corporate sites due to timing or classification differences.

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.

Insurance Information

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.

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