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James Nielsen

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  • Pediatric Cardiology


  • American Board of Pediatrics


  • MD, Tulane University

  • Residency, Pediatrics
    Tulane University Medical Center

  • Fellowship, Pediatric Cardiology
    Mount Sinai Hospital

  • Fellowship, Pediatric Cardiology
    Children's Hospital Boston


    Dr. Nielsen is board certified in Pediatric Cardiology by the American Board of Pediatrics.

    Areas of Expertise
    Echocardiography, Fetal Cardiology and Cardiac MRI.


Nielsen JC, Powell AJ. Cardiovascular MRI Applications in Congenital Heart Disease. Indian Journal of Radiology and Imaging 2007; 17(2): 86-97.

Prakash A, Printz BF, Gersony WM, Nielsen JC. Usefulness of Magnetic Resonance Angiography in the Evaluation of Complex Congenital Heart Disease in Newborns and Infants. Am J Cardiol 2007; 100: 715-721.

Katz JC, Chakravarti S, Ko HH, Lytrivi ID, Srivastava S, Lai WW, Parness IA, Nguyen K, Nielsen JC. Common Origin of the Innominate and Carotid Arteries: Prevalence, Nomenclature and Surgical Implications. J Am Soc Echocardiogr 2006; 19(12): 1446-1448.

Dyme JL, Prakash A, Printz BF, Kaur A, Parness IA, Nielsen JC. Physiology of Isolated Anomalous Pulmonary Venous Connection of a Single Pulmonary Vein as Determined by Cardiac Magnetic Resonance Imaging. Am J Card 2006; 98(1): 107-110.

Nielsen JC, Powell AJ, Gauvreau K, Marcus KN, Prakash A, Geva T. Magnetic Resonance Imaging Predictors of Coarctation Severity. Circulation 2005; 111(5): 622-628.

Lytrivi ID, Ko HH, Srivastava S, Norton K, Goldman J, Parness IA, Lai WL, Nielsen JC. Regional Differences in Right Ventricular Systolic Function as Determined by Cine Magnetic Resonance Imaging After Infundibulotomy. Am J Card 2004; 94: 970-973.

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. Nielsen 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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Pediatric Cardiology

1468 Madison Avenue
Suite 3-50
New York, NY 10029

Tel: 212-241-7672
Get Directions

Office Hours:
  • Monday 9:00am - 5:00pm
  • Tuesday 9:00am - 5:00pm
  • Wednesday 9:00am - 5:00pm
  • Thursday 9:00am - 5:00pm
  • Friday 9:00am - 5:00pm
Insurance Plans
  • 1199 National Benefit Fund
  • Aetna U.S. Healthcare
  • Beech Street
  • CarePlus, LLC
  • Cigna - HMO
  • Empire Blue Cross/Blue Shield - PPO
  • First Health
  • GHI HMO Select, Inc.
  • Group Health Insurance, Inc.
  • Health Insurance Plan (HIP)
  • HealthPlus, Inc.
  • Healthfirst
  • Healthnet-Empire BCBS
  • Medicaid
  • Medicaid New Jersey
  • Medicare
  • MetroPlus Health Plan
  • MultiPlan, Inc.
  • Neighborhood Health Providers, LLC
  • Other
  • Oxford Health Plans
  • Private Healthcare Systems (PHCS)
  • United Healthcare