Dr. Grant Ronald Layton , DMD
Dentist - Endodontics β’ Tamuning, GU
50 Farenholt Ave
Tamuning, GU 969133106
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
50 Farenholt Ave
Tamuning, GU 969133106
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Dentist - Endodontics: NPPES taxonomy is a reported classification, not proof of board certification.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
NPI first issued
2012
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Tamuning and Guam
2 active clinicians are listed under Dentist - Endodontics with a practice address in Tamuning, GU (2 in Guam).
Addresses are self-reported to NPPES and may be out of date.
Sources: CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2026-02-09NUCC Taxonomy Code: 1223E0200X
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.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 50 FARENHOLT AVE, TAMUNING, GU 969133106 (Tel: 6713449269)
Registered at PSC 455 BOX 208, FPO, AP 965400003 (Tel: 6713449269)
Dentist (license number reported to NPPES: UT 8311802-9922)
Registered at 153 A ST, ATTENTION: CODE 00QM, JACKSONVILLE, NC 28540 (Tel: 9104511658)
Registered at PSC BOX 20130, CAMP LEJEUNE, NC 285420125 (Tel: 9104511658)
NPI status registered as active in NPPES database
Registered at H100 SANTA MARGARITA ROAD, ATTENTION: CODE 00QM, CAMP PENDLETON, CA 920555191 (Tel: 7607251200)
Registered at H100 SANTA MARGARITA ROAD, ATTENTION: CODE 00QM, CAMP PENDLETON, CA 920555191 (Tel: 7607251200)
Recorded as GRANT LAYTON, D.M.D.
Dentist (license number reported to NPPES: UT 8311802-9922)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
Psc 455 Box 208
Fpo, AP 965400003
Phone: 6713449269