What is Leonard Leffler's NPI number?

Leonard Leffler's National Provider Identifier (NPI) is 1437518735, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Leonard Leffler's specialty?

Leonard Leffler is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).

Where is Leonard Leffler located?

Leonard Leffler's practice location on file with NPPES is 1323 E 66th St, Brooklyn, NY 11234-5632.

What is Leonard Leffler's phone number?

The practice phone number listed in the NPPES registry for Leonard Leffler is (646) 400-1661.

Is Leonard Leffler's NPI active?

Yes — Leonard Leffler's NPI (1437518735) is active in the NPPES registry as of the last update on 2022-07-21.

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Leonard Leffler

NPI 1437518735 · Specialist · Brooklyn, NY

Leonard Leffler is a Specialist provider in Brooklyn, NY (NPI 1437518735).

Provider details

NPI number: 1437518735
Entity type: Individual
Primary specialty: SpecialistOther Service Providers
Sex: Male
Sole proprietor: Yes

Specialties & taxonomies

SpecialistPrimary174400000X
Other Service Providers

Profile Score

Established profile(66/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
10 yrs in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

1323 E 66th St

Brooklyn, NY 11234-5632

Phone: (646) 400-1661

Street-level locationGet directions

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Mailing address