Dr. John Leff MD
About this NPIWhat this record shows.
NPI 1689693327 is registered to Dr. John Leff MD, a Endocrinology, Diabetes & Metabolism Physician practising at Lutheran Medical Center, 150 55th St in Brooklyn, New York. Endocrinology, Diabetes & Metabolism Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. John Leff MD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Dr. John Leff MD accepts. To confirm in-network status with your specific health plan, contact Dr. John Leff MD directly at (718) 630-7369.
Frequently asked
Yes. NPI 1689693327 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Endocrinology, Diabetes & Metabolism Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (718) 630-7369.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Dr. John Leff MD is a Type-1 individual NPI.