Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Derek James Youssef, DVM

Veterinarian in New York, NY · enumerated 2021.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1851057194

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Registry record

Entity type Individual (Type 1)

Name Dr. Derek James Youssef

Credential DVM

Sex Male

Practice address New York, NY, 10027

Phone (212) 280-3700

Enumeration date Nov 10, 2021

Last updated in NPPES Apr 29, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174M00000X Veterinarian Other Service Providers · License 5392 (CT) Secondary

174M00000X Veterinarian Other Service Providers · License VM19290 (FL) Secondary

174M00000X Veterinarian Other Service Providers · License 013636 (NY) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Derek James Youssef?

Derek James Youssef is registered in NPPES with the primary taxonomy of Veterinarian. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-29.