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Grant Michael Wallenfelsz, MD

NPI 1194353318ActiveIndividual· Emergency Medicine· Agana Heights, GU

Emergency Medicine (MD) in Agana Heights, Guam, trained at Florida State University College of Medicine (class of 2020). Medicare paid $2,730 for services to 20 patients in 2024.

Overview

NPI1194353318
StatusActive
Entity typeIndividual
CredentialMD
Sole proprietorNo
NPI issuedApr 1, 2020
Last updated in NPPESOct 2, 2025
Certified by providerOct 2, 2025

Specialties and licenses

TaxonomyCodeLicenseState
Emergency Medicine Primary207P00000XT3715TX
Emergency Medicine207P00000XA187218CA
Emergency Medicine207P00000XM-2480GU

About license numbers in NPPES

Exclusion screening

ListResultDetails
HHS-OIG LEIE · Nov 10, 2026No matchChecked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026No match—
New York OMIG · Nov 11, 2026No match—
Ohio Medicaid · Nov 11, 2026No match—
Pennsylvania Medicheck · Nov 11, 2026No match—
Washington HCA · Nov 11, 2026No match—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)Enrolled Practitioner - Emergency Medicine (CA); Practitioner - Emergency Medicine (GU)
Accepts assignmentYes (participating)

Medicare services in 2024

Medicare patients20
Services billed34 across 7 procedure codes
Paid by Medicare$2,730

Medicare sources and data years

Education and affiliations

Medical schoolFlorida State University College of Medicine
Graduation year2020
Medicare specialtyEmergency Medicine

Medical group

Hospital affiliation

Source: CMS Care Compare

Industry payments (Open Payments)

None reported for 2025 or 2024.

Receiving payments does not imply wrongdoing. What Open Payments covers ·original records

Other emergency medicine physicians in Agana Heights

All emergency medicine physicians in Guam