Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Brian R Thomas, D.D.S.

General Practice Dentistry in Medfield, MA · enumerated 2007.

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

National Provider Identifier

1891904520

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Registry record

Entity type Individual (Type 1)

Name Brian R Thomas

Credential D.D.S.

Sex Male

Practice address 8 Tannery Rd, Medfield, MA, 02052

Phone (508) 359-7073

Enumeration date May 21, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 14873 (MA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

How do I verify Brian Thomas's NPI record?

Cross-check NPI 1891904520 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891904520 active?

Yes, as of the latest NPPES snapshot, NPI 1891904520 is active (record last updated 2007-07-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.