Leonard Rossoff, MD
NPI 1326003658 · Internal Medicine Physician · New Hyde Park, NY
Enrolled with Medicare as Order and Referring Only - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonard Rossoff, MD is a Internal Medicine Physician provider in New Hyde Park, NY (NPI 1326003658).
Provider details
- NPI number
- 1326003658
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 140753 (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
- 2006-04-19
- Last updated
- 2011-02-04
Frequently asked questions
- What is Leonard Rossoff's NPI number?
- Leonard Rossoff's National Provider Identifier (NPI) is 1326003658, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Rossoff's specialty?
- Leonard Rossoff is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard Rossoff located?
- Leonard Rossoff's practice location on file with NPPES is 410 Lakeville Rd, New Hyde Park, NY 11042-1101.
- What is Leonard Rossoff's phone number?
- The practice phone number listed in the NPPES registry for Leonard Rossoff is (516) 470-6400.
- Does Leonard Rossoff accept Medicare?
- Leonard Rossoff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leonard Rossoff's NPI active?
- Yes — Leonard Rossoff's NPI (1326003658) is active in the NPPES registry as of the last update on 2011-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.