Grant Michael Wallenfelsz, MD
Emergency Medicine Physician · Agana Heights, GU
Grant Michael Wallenfelsz, MD is an emergency medicine physician with a practice address in Agana Heights, Guam, and NPI 1194353318, issued on Apr 1, 2020. Check the license (Guam M-2480, as entered in NPPES) with the Guam board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Grant Michael Wallenfelsz
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- M-2480 GU
T3715 TX
A187218 CA
Self-reported in NPPES; status is on the state search - Practice location
- Bldg #50 Farenholt Ave, Agana Heights, GU 96910
- Phone
- (671) 344-9340
- Enumerated
- Apr 1, 2020
- Record last updated
- Oct 2, 2025
- Medicare enrollment
- Enrolled (PECOS I20250918004578); accepts Medicare assignment
- Medical or professional school
- Florida State University College Of Medicine, 2020
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 29 in Guam → Look up another NPI →
Also registered at Bldg #50 Farenholt Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bryan Faulk, DENTAL TECHNICIANDental Assistant1346948908
Verify Grant Michael Wallenfelsz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Guam board licenses this profession
Search for license M-2480Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Cep America - CaliforniaBrawley, CA
- Guam Healthcare Development IncorporatedDededo, GU
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant Michael Wallenfelsz among 29 emergency medicine physician records in Guam
Grant Michael Wallenfelsz, MD is one of 29 emergency medicine physician records with a practice address in Guam. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 86% of them.
- NPI issued2020 · 86% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2020 · median 2011 among the 21 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Guam practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 emergency medicine physician records list a practice address in Agana Heights
They are 13 of the 146 NPPES records with a practice address in Agana Heights, and 29 emergency medicine physician records in Guam.
All 29 in Guam → Every provider in Agana Heights → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Maria Jose Araujo, MDAgana Heights, GU 969101902499288
- Jessica ArrottAgana Heights, GU 969101902365737
- Ruth Compton, DOTutuhan, GU 969101831484047
- Taylor Desrosiers, MD, MBAAgana Heights, GU 969101205176773
- John Haggerty, D.O.Agana Heights, GU 969101427395326
- John Hunt, M.D.Agana Heights, GU 969101487004099
- Michael Laroy, DOAgana Heights, GU 969101598295214
- Daniel Neren, MDAgana Heights, GU 969101568025013
Common questions
What is Grant Michael Wallenfelsz, MD's NPI number?
Grant Michael Wallenfelsz, MD's National Provider Identifier (NPI) is 1194353318, issued on Apr 1, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Grant Michael Wallenfelsz, MD located?
The NPPES record lists a practice address at Bldg #50 Farenholt Ave, Agana Heights, GU, 96910. Phone: (671) 344-9340. Providers update this record themselves, so call before visiting.
How can I verify Grant Michael Wallenfelsz, MD's license?
NPPES lists Guam license number M-2480, as entered by the provider. Search the Guam board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.