Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory Trandon Lee Jefferson

Dentist in Shelby, MT · enumerated 2022.

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

National Provider Identifier

1669109229

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Registry record

Entity type Individual (Type 1)

Name Gregory Trandon Lee Jefferson

Sex Male

Practice address 865 Oilfield Ave, Shelby, MT, 59474

Phone (406) 434-3142

Enumeration date Aug 4, 2022

Last updated in NPPES Aug 24, 2023

Taxonomy & licenses

122300000X Dentist Dental Providers · License 25964 (MT) 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

Is NPI 1669109229 active?

Yes, as of the latest NPPES snapshot, NPI 1669109229 is active (record last updated 2023-08-24).

How do I verify Gregory Jefferson's NPI record?

Cross-check NPI 1669109229 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Larry Bonderud Optometrist · Shelby, MT NPI 1164414322 Bryan Haight General Practice Dentistry · Shelby, MT NPI 1114968831 John Moore General Practice Dentistry · Shelby, MT NPI 1083777684 Dylan Weishaar General Practice Dentistry · Shelby, MT NPI 1093244212 Joren Bonderud Optometrist · Shelby, MT NPI 1679063853

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-24.