Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Jefferson

Contractor in Las Vegas, NV · enumerated 2023.

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

National Provider Identifier

1639946080

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Registry record

Entity type Individual (Type 1)

Name Gregory Jefferson

Sex Male

Practice address 314 Foremaster Ln, Las Vegas, NV, 89101

Phone (702) 857-8800

Enumeration date Dec 6, 2023

Last updated in NPPES Dec 6, 2023

Taxonomy & licenses

171W00000X Contractor Other Service Providers 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 Gregory Jefferson?

Gregory Jefferson is registered in NPPES with the primary taxonomy of Contractor. 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-12-06.