Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John L Guerin D.M.D PC

Q: What is the NPI number for John L Guerin D.M.D PC?

The NPI for John L Guerin D.M.D PC is 1477738912, a Type 2 (organization) record in the CMS NPPES registry.

General Practice Dentistry in Tewksbury, MA · enumerated 2008 · authorized official John Guerin, Dentist / Owner.

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

National Provider Identifier

1477738912

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Registry record

Entity type Organization (Type 2)

Legal business name John L Guerin D.M.D PC

Practice address 2171 Main St, Tewksbury, MA, 01876

Phone (978) 988-1298

Enumeration date Jan 3, 2008

Last updated in NPPES Jan 3, 2008

Taxonomy & classification

1223G0001X General Practice Dentistry Dental Providers · License 18597 (MA) Primary

Authorized official

Name John Guerin

Title Dentist / Owner

Phone (978) 988-1298

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 is the NPI number for John L Guerin D.M.D PC?

The NPI for John L Guerin D.M.D PC is 1477738912, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for John L Guerin D.M.D PC?

NPPES lists John Guerin (Dentist / Owner) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-03.