Howard Leaf, M.D.
NPI 1942253943 · Infectious Disease Physician · New York, NY
Enrolled with Medicare as Order and Referring Only - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Howard Leaf, M.D. is a Infectious Disease Physician provider in New York, NY (NPI 1942253943).
Provider details
- NPI number
- 1942253943
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- 159318 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% 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
Mailing address
Registry dates
- Enumerated
- 2006-05-18
- Last updated
- 2007-07-08
Frequently asked questions
- What is Howard Leaf's NPI number?
- Howard Leaf's National Provider Identifier (NPI) is 1942253943, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Howard Leaf's specialty?
- Howard Leaf is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Howard Leaf located?
- Howard Leaf's practice location on file with NPPES is 423 E 23rd St, New York, NY 10010-5011.
- What is Howard Leaf's phone number?
- The practice phone number listed in the NPPES registry for Howard Leaf is (212) 686-7500.
- Does Howard Leaf accept Medicare?
- Howard Leaf is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Howard Leaf's NPI active?
- Yes — Howard Leaf's NPI (1942253943) 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.