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DR. JOHN LEFF MD
NPI 1689693327
Internal Medicine - Endocrinology, Diabetes & Metabolism in Brooklyn, NY

Active since July 19, 2006
LUTHERAN MEDICAL CENTER, 150 55TH ST, BROOKLYN, NY 11220(718) 630-7369(718) 630-6286 Get Directions Write a Review

NPPES record last updated: January 17, 2012. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. John Leff Md NPPES

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

DR. JOHN LEFF MD (NPI 1689693327) is an individual endocrinology, diabetes & metabolism provider in Brooklyn, New York, licensed in New York (143472) and active in the NPI registry since July 2006.

NPPES Registry Identity

NPI1689693327
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameDR. JOHN LEFFCredential: MD
Location AddressLUTHERAN MEDICAL CENTER, 150 55TH STBrooklyn, NY 11220
Mailing Address150 55th St, Station 14Brooklyn, NY 11220-2508 · (718) 630-7369 · Fax (718) 630-6286
Phone(718) 630-7369
Fax(718) 630-6286
Sole ProprietorNo
Enumeration DateJuly 19, 2006
Last NPPES UpdateJanuary 17, 2012
✔ NPI 1689693327 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in NY · 143472
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
LUTHERAN MEDICAL CENTER, Brooklyn, NY 11220
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Other Identifiers 1

Medicare UPINCO4500NY

Other Providers at the Same Location NPPES

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

DR. IDOKO SALIFU MD, MPH
Specialist
LUTHERAN MEDICAL CENTER, 150 55TH ST
BROOKLYN, NY 11220
Kings County (718) 630-7000

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 John Leff's NPI number?

The NPI number for John Leff is 1689693327. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is John Leff located?

John Leff practices at Lutheran Medical Center 150 55th St, Brooklyn, NY 11220. The listed phone number is (718) 630-7369.

What is John Leff's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

When was this NPI record last updated?

The NPPES record for John Leff was last updated on January 17, 2012. NPI Profile syncs with the weekly NPPES data releases published by CMS.