David C Portnoy, MD

img_David C Portnoy
ASSOCIATE PROFESSOR | Medicine, Hospital Medicine
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Specialties
Internal Medicine, Hospital Medicine
Lupus Nephritis
ANA-negative lupus nephritis has similar clinical outcomes to conventional disease, suggesting that the two entities should be treated identically.

MD, SUNY Downstate Health Sciences University - College of Medicine

Residency, Internal Medicine, UVA Health Medical Center

Residency, Internal Medicine, University of Virginia Health System

Certifications

American Board of Internal Medicine

2016

ACP Young Achiever

American College of Physicians

2013

Resident Member

American Colloege of Physicians

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

Dr. Portnoy did not report having any of the following types of financial relationships with industry and other outside entities during 2025 and/or 2026: 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.