Leonard Leff, D.M.D.
NPI 1134243041 · Dentist · West Orange, NJ
Leonard Leff, D.M.D. is a Dentist provider in West Orange, NJ (NPI 1134243041).
Provider details
- NPI number
- 1134243041
- Entity type
- Individual
- Primary specialty
- DentistDental Providers
- Credential
- D.M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- DI15101 (NJ)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$375 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-17
- Last updated
- 2007-07-08
Frequently asked questions
- What is Leonard Leff's NPI number?
- Leonard Leff's National Provider Identifier (NPI) is 1134243041, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Leff's specialty?
- Leonard Leff is listed in the NPPES registry with a primary specialty of Dentist (Dental Providers).
- Where is Leonard Leff located?
- Leonard Leff's practice location on file with NPPES is 515 Valley Rd, West Orange, NJ 07052-5234.
- What is Leonard Leff's phone number?
- The practice phone number listed in the NPPES registry for Leonard Leff is (973) 731-8313.
- Is Leonard Leff's NPI active?
- Yes — Leonard Leff's NPI (1134243041) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.