John Leff, MD
Endocrinology
20+ years in practiceNPI: 1689693327Licensed in NY
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Credentials & Recognition
Specialties
Endocrinology
NPI sub-specialties
Internal Medicine, Endocrinology, Diabetes & Metabolism207RE0101X
Practice Signals
Editorial signals beyond credentials. Patient transparency over opacity. See methodology.
Mid-Level (PA/NP) Use
Doctor-led visits
Years in Practice
20+ years
Estimated from NPI enumeration date
Other Endocrinology Doctors near New York
View all →Frequently Asked Questions about Dr. John Leff, MD
Where does Dr. John Leff, MD practice?+
Dr. John Leff, MD practices in New York, NY. LUTHERAN MEDICAL CENTER
150 55TH ST
BROOKLYN, NY 11220.
What is Dr. John Leff, MD's phone number?+
Dr. John Leff, MD's practice phone is 718-630-7369. Office contact information is verified on the PBCMMG profile.
What does Dr. John Leff, MD specialize in?+
Dr. John Leff, MD's primary specialty is Endocrinology.
Is Dr. John Leff, MD board certified?+
Board certification status for Dr. John Leff, MD has not been verified in the data sources PBCMMG uses (ABMS, state medical boards). The PBCMMG profile shows their current credential set.
How long has Dr. John Leff, MD been practicing?+
Dr. John Leff, MD has been in active practice for 20+ years, based on NPI enumeration and state licensing records.
What is Dr. John Leff, MD's NPI number?+
Dr. John Leff, MD's National Provider Identifier (NPI) is 1689693327, registered in the federal NPPES registry.
Profile maintained by Palm Beach County Medical Media Group, Inc. | Data verified from public registries (NPPES, ABMS, state medical boards). Methodology · Editorial Standards
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