Leon Itwar, DO
NPI 1356964258 · Endocrinology, Diabetes & Metabolism Physician · New Hyde Park, NY
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leon Itwar, DO is a Endocrinology, Diabetes & Metabolism Physician provider in New Hyde Park, NY (NPI 1356964258).
Provider details
- NPI number
- 1356964258
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 337425 (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
6 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dulaglutidebrand: Trulicity | 69 | 17 |
| Levothyroxine Sodium | 66 | 22 |
| Semaglutidebrand: Ozempic | 55 | — |
| Metformin Hclbrand: Metformin Hcl Er | 43 | 15 |
| Testosterone | 25 | — |
| Atorvastatin Calcium | 23 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-05-26
- Last updated
- 2025-07-10
- Certified
- 2025-07-10
Frequently asked questions
- What is Leon Itwar's NPI number?
- Leon Itwar's National Provider Identifier (NPI) is 1356964258, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leon Itwar's specialty?
- Leon Itwar is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Leon Itwar located?
- Leon Itwar's practice location on file with NPPES is 1999 Marcus Ave Ste 212, New Hyde Park, NY 11042-1021.
- What is Leon Itwar's phone number?
- The practice phone number listed in the NPPES registry for Leon Itwar is (516) 467-8600.
- Does Leon Itwar accept Medicare?
- Leon Itwar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leon Itwar's NPI active?
- Yes — Leon Itwar's NPI (1356964258) is active in the NPPES registry as of the last update on 2025-07-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.