DR. GRANT RONALD LAYTON D.M.D.
NPI 1588918908
Dentist - Endodontics in Tamuning, GU

Q: What is Grant Layton's NPI number?

The NPI number for Grant Layton is 1588918908. It was assigned to this individual provider in the NPPES registry on November 7, 2012.

Q: What is Grant Layton's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Endodontics, with taxonomy code 1223E0200X.

Q: When was this NPI record last updated?

The NPPES record for Grant Layton was last updated on February 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since November 07, 2012

50 FARENHOLT AVE, TAMUNING, GU 96913(671) 344-9269 Get Directions Write a Review

NPPES record last updated: February 9, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Grant Ronald Layton D.m.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GRANT RONALD LAYTON D.M.D. (NPI 1588918908) is an individual endodontics provider in Tamuning, Guam, licensed in Utah (8311802-9922) and active in the NPI registry since November 2012.

NPPES Registry Identity

NPI1588918908

Entity TypeIndividualMale

Primary Taxonomy1223E0200X

Provider Legal NameDR. GRANT RONALD LAYTONCredential: D.M.D.

Location Address50 FARENHOLT AVETamuning, GU 96913-3106

Mailing AddressPsc 455 Box 208Fpo, AP 96540-0003 · (671) 344-9269

Phone(671) 344-9269

Sole ProprietorYes

Enumeration DateNovember 7, 2012

Last NPPES UpdateFebruary 9, 2026

NPPES CertifiedFebruary 9, 2026

✔ NPI 1588918908 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · EndodonticsDental Providers

Taxonomy Code1223E0200X

License✔ Licensed in UT · 8311802-9922

Definition

The branch of dentistry that is concerned with the morphology, physiology and pathology of the human dental pulp and periradicular tissues. Its study and practice encompass the basic and clinical sciences including biology of the normal pulp, the etiology, diagnosis, prevention and treatment of diseases and injuries of the pulp and associated periradicular conditions.

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. BRIAN SCOTT FORD M.D.

Family Medicine

50 FARENHOLT AVE
TAMUNING, GU 96913

Guam (671) 929-1139

SCOTT ALLEN METEER DO

Family Medicine

50 FARENHOLT AVE
TAMUNING, GU 96913

Guam (671) 344-9202

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grant Layton's NPI number?

The NPI number for Grant Layton is 1588918908. It was assigned to this individual provider in the NPPES registry on November 7, 2012.

Where is Grant Layton located?

Grant Layton practices at 50 Farenholt Ave, Tamuning, GU 96913. The listed phone number is (671) 344-9269.

What is Grant Layton's specialty?

The primary specialty registered for this NPI is Dentist, specializing in Endodontics, with taxonomy code 1223E0200X.

When was this NPI record last updated?

The NPPES record for Grant Layton was last updated on February 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.