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Ira Bleiweiss

  • PROFESSOR Pathology
  • PROFESSOR Oncological Sciences
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  • Anatomic & Clinical Pathology

Clinical Focus


  • MD, St. George's University

  • Residency, Pathology
    Mount Sinai Hospital

  • Fellowship, Surgical Pathology
    Mount Sinai Hospital

  • Fellowship, Pathology
    Memorial Sloan-Kettering


    Dr. Bleiweiss is an internationally known surgical pathologist specializing in breast pathology. He is a professor of Pathology, Chief of Surgical Pathology, and Director of the Division of Breast Pathology. He is an active participant in national clinical breast cancer trials and has led the Breast Pathology Cadre of Cancer and Leukemia Group B, one of the Cooperative Clinical Oncology Groups sponsored by the National Cancer Institute. Dr. Bleiweiss has published numerous and book chapters and is the first author of a textbook correlating radiologic and pathologic findings in breast core biopsies. He serves as a reviewer and editorial board member for several peer-reviewed journals, and has played a leadership role in many pathology and multidisciplinary breast cancer-focused societies, regionally, nationally, and internationally.

    Dr. Ira Bleiweiss discusses breast biopsies in The Daily News Feature The Daily Check Up.


  • 2009 -
    Best Doctors
    New York Magazine


Correlation of radiologic and pathologic findings; especially in core biopsiesPathology of Sentinel Lymph Node Procedures


Jing Y, Zhang J, Bleiweiss IB, Waxman S, Zelent A, Mira-Y-Lopez R . Defective expression of cellular retinol binding protein type I and retinoic acid receptors a2, b2, and g2 in human breast cancer cells. FASEB J 1996; 10: 1064-1070.

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. Bleiweiss did not report having any of the following types of financial relationships with industry during 2014 and/or 2015: 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

Mount Sinai Health System (MSHS) physicians - including those employed by MSHS - do not always participate in the same health plans in which MSHS hospitals or facilities participate.

Information regarding insurance participation and billing by this physician may be found on this page or obtained by contacting this provider directly.

Insurance plans that the Mount Sinai Health System hospitals or facilities participate in can be found on the Mount Sinai Health System website.

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One Gustave Levy Place
Box 1194
New York, NY 10029

Tel: 212-241-7373
Fax: 212-831-4877


Annenberg Building
1468 Madison Avenue, Room 15-26
New York, NY 10029

Tel: 212-241-7373
Fax: 212-831-4877
Mount Sinai Hospital Pathology Dept.

One Gustave Levy Place
Box 1194
New York, NY 10029

Tel: 212-241-9159
Fax: 212-831-4877
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Office Hours:
  • Monday 8:00am - 5:00pm
  • Tuesday 8:00am - 5:00pm
  • Wednesday 8:00am - 5:00pm
  • Thursday 8:00am - 5:00pm
  • Friday 8:00am - 5:00pm
Insurance Plans
  • 1199 National Benefit Fund
  • 32B-J Building Service
  • Aetna U.S. Healthcare
  • Empire Blue Cross/Blue Shield
  • Group Health Insurance, Inc.
  • Medicaid
  • Medicare
  • MultiPlan, Inc.
  • NYLCare Health Plans of NY, Inc.
  • Oxford Health Plans
  • PHS/Healthnet/Guardian
  • Prem Preferred Care/Beechstreet
  • United Healthcare
  • Worker's Compensation