Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Robert Matthew Simpson

Public Health Dentistry in Red Bluff, CA · enumerated 2020.

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

National Provider Identifier

1336740216

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Registry record

Entity type Individual (Type 1)

Name Thomas Robert Matthew Simpson

Sex Male

Practice address 1387 Kirsten Ct, Red Bluff, CA, 96080

Phone (530) 840-4028

Enumeration date Nov 5, 2020

Last updated in NPPES Nov 5, 2020

Taxonomy & licenses

1223D0001X Public Health Dentistry Dental Providers · License Y6809332 (CA) 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.

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Frequently asked questions

What is the NPI number for Thomas Simpson?

The National Provider Identifier (NPI) for Thomas Simpson is 1336740216, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thomas Simpson practice?

The practice location on file with NPPES is in Red Bluff, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-11-05.