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Mary O'Sullivan

  • ASSISTANT PROFESSOR Medicine, Pulmonary, Critical Care and Sleep Medicine
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  • Pulmonary Disease

  • American Board of Internal Medicine


  • MD, Weill Cornell Medical College

  • Internship, Internal Medicine
    St. Luke's-Roosevelt Hospital Ctr.

  • Residency, Internal Medicine
    St. Luke's-Roosevelt Hospital Ctr.

  • Residency, Internal Medicine
    St. Luke's-Roosevelt Hospital Ctr.

  • Fellowship, Pulmonary Medicine
    St. Luke's-Roosevelt Hospital Ctr.


    Over the past three decades, Dr. Mary O’Sullivan has dedicated a significant portion of her medical career to educating professionals, patients, public health officials and legal communities about the positive impact of smoking cessation on overall health. She regularly leads smoking cessation trainings and nicotine replacement programs. Her findings have been presented in scientific journals, at medical and law symposiums and to hospital staff and students. She has published various related articles and influential book chapters. Dr. O’Sullivan also reviews manuscripts for Journal of Asthma.

    A committed and engaged educator, Dr. O’Sullivan provides development and direction for the smoking cessation clinics at both Mount Sinai St. Luke’s and Mount Sinai Roosevelt in New York City. At St. Luke’s, she is also an academic chief of the hospital’s Chest Clinic. She is co-director of the Mount Sinai Health System’s Pulmonary Critical Care Fellowship Program, a position she took in 1995 after serving as the program’s director since 1981. In addition, Dr. O’Sullivan provides oversight to the smoking cessation training for the Cardiovascular Disease Prevention Program at Mount Sinai Health System, and precepts Columbia University medical students and Long Island University pharmacy students in asthma and smoking cessationclinics.

    Dr. O’Sullivan belongs to the American Thoracic Society and the American College of Chest Physicians. She is a member of the advisory boards of the New York Legal Assistance Group and the Lung Cancer Alliance.


Dr. Mary O’Sullivan’s research interests focus on smoking cessation and intervention programs, especially within New York City and State. She has received support from the New York City Department of Health to investigate nicotine replacement therapies, and has also received grants from both the New York City Department of Health and Mental Hygiene’s Bureau of Tobacco Control and the Centers for Disease Control via the Fund for Public Health in New York City to study the impact that smoking cessation clinics have on intern behavior. Additionally, she has led a smoking intervention program for HIV-positive outpatient, and also served as co-investigator for a lung cancer screening study.


Abd AG, Braun NMT, Baskin MI, O'Sullivan MM, Alkaitis, DA. Diaphragmatic dysfunction after open heart surgery: treatment with a rocking bed. Ann Int Med. 1989;111:881-886..;.

Ford JG, Li Y, O’Sullivan MM, Demopoulos R, Garte S, Taioli E, Brandt-Raul PW. Glutathione S-Transferase MI polymorphism and lung cancer risk in African-Americans. Carcinogenesis. Vol 21, No. 11. 2000;1971-1975.;.

O’Sullivan MM, Brandfield J, Hoskote S, Segal S, Chug L, Modrykamien A, Eden E. Environmental improvements brought by legal interventions in the homes of poorly controlled inner-city adult asthmatic patients: a proof of concept study. Journal of Asthma. 2012;49(9): 911-917..;.

O’Sullivan MM. Smoking cessation in the cardiac patient. In: Hong M, Herzog E, eds. Acute Coronary Syndrome: Multidisciplinary and Pathway-Based Approach. Springer. 2007..;.

O’Sullivan MM. (1) Smoking cessation in the cardiac patient. (2) Patient and family information for smoking cessation. In: Herzog E, ed. The Cardiac Care Unit Survival Guide. WoltersKluwer/ Lippincott Williams and Wilkins. 2012..;.

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. O'Sullivan 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

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