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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARGARET R. HAMMERSCHLAG M.D.
NPI 1629053103
Pediatrics - Pediatric Infectious Diseases in Brooklyn, NY

Active since December 07, 2005
450 CLARKSON AVE, B4-333, BROOKLYN, NY 11203(718) 270-4714(718) 270-1985 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Margaret R. Hammerschlag M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARGARET R. HAMMERSCHLAG M.D. (NPI 1629053103) is an individual pediatric infectious diseases provider in Brooklyn, New York, licensed in New York (141472-1) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1629053103
Entity TypeIndividualFemale
Primary Taxonomy2080P0208X
Provider Legal NameDR. MARGARET R. HAMMERSCHLAGCredential: M.D.
Location Address450 CLARKSON AVE, B4-333Brooklyn, NY 11203-2056
Mailing Address450 Clarkson Ave, Box 1262Brooklyn, NY 11203-2056 · (718) 270-8867 · Fax (718) 270-1794
Phone(718) 270-4714
Fax(718) 270-1985
Sole ProprietorNo
Enumeration DateDecember 7, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1629053103 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Infectious DiseasesAllopathic & Osteopathic Physicians
Taxonomy Code2080P0208X
License✔ Licensed in NY · 141472-1
Definition
A pediatrician trained to care for children in the diagnosis, treatment and prevention of infectious diseases. This specialist can apply specific knowledge to affect a better outcome for pediatric infections with complicated courses, underlying diseases that predispose to unusual or severe infections, unclear diagnoses, uncommon diseases and complex or investigational treatments.
450 CLARKSON AVE, Brooklyn, NY 11203
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Other Identifiers 1

Medicaid00695767NY

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SUNY DOWNSTATE MEDICAL CENTER UHB
Obstetrics & Gynecology
450 CLARKSON AVE
BROOKLYN, NY 11203
Kings County (718) 363-2908
UNIVERSITY PHYSICIANS OF BROOKLYN
Internal Medicine (Gastroenterology)
450 CLARKSON AVE, SUITE A
BROOKLYN, NY 11203
Kings County (718) 270-1112
SNEHALATA R TOPGI MD
Emergency Medicine
450 CLARKSON AVE
BROOKLYN, NY 11203
Kings County (718) 270-3295
DR. MARYAM NOORI KOLOORI M.D.
Student in an Organized Health Care Education/Training Program
450 CLARKSON AVE, SUNY DOWNSTATE MEDICAL CENTER
BROOKLYN, NY 11203
Kings County (412) 737-3789
DR. VIVEK YADAV MD
Internal Medicine (Pulmonary Disease)
450 CLARKSON AVE
BROOKLYN, NY 11203
Kings County (718) 270-3302
DR. DANIEL BEEGAN MD
Family Medicine
450 CLARKSON AVE, MSC 67
BROOKLYN, NY 11203
Kings County (718) 270-4096
ELIEZER LEVITANSKY DO
Emergency Medicine
450 CLARKSON AVE
BROOKLYN, NY 11203
Kings County (245) 331-8718
MIGUEL ANGEL BARRIOS MD
Emergency Medicine
450 CLARKSON AVE
BROOKLYN, NY 11203
Kings County (718) 245-4798

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Margaret Hammerschlag's NPI number?

The NPI number for Margaret Hammerschlag is 1629053103. It was assigned to this individual provider in the NPPES registry on December 7, 2005.

Where is Margaret Hammerschlag located?

Margaret Hammerschlag practices at 450 Clarkson Ave B4-333, Brooklyn, NY 11203. The listed phone number is (718) 270-4714.

What is Margaret Hammerschlag's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Infectious Diseases, with taxonomy code 2080P0208X.

When was this NPI record last updated?

The NPPES record for Margaret Hammerschlag was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.