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Tammy Huynh Frey

NPI 1952114225ActiveIndividual· Physician Assistant· Fountain Valley, CA

Physician Assistant with Tri Thuong Nguyen MD APC, practicing in Fountain Valley, California. Enrolled in Medicare as practitioner - physician assistant. Salix Pharmaceuticals, A Division of Bausch Health US, LLC was the largest of 3 companies reporting payments in 2025, $118.79 in all, mostly food and beverage.

Overview

NPI1952114225
StatusActive
Entity typeIndividual
Sole proprietorYes
NPI issuedJan 30, 2025
Last updated in NPPESOct 1, 2026
Certified by providerOct 1, 2026

Specialties and licenses

TaxonomyCodeLicenseState
Physician Assistant Primary363A00000X—CA

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 - Physician Assistant (CA)

Medicare sources and data years

Education and affiliations

Graduation year2024
Medicare specialtyPhysician Assistant

Medical group

Source: CMS Care Compare

Industry payments (Open Payments)

  • 2025$118.79 · 6 payments from 3 companies

Top paying companies in 2025

CompanyAmountPayments
Salix Pharmaceuticals, A Division of Bausch Health US, LLC$72.594
Amgen Inc.$26.811
Merck Sharp & Dohme LLC$19.391

What the 2025 payments were for

  • Food and Beverage$118.79 · 6 payments

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

Other physician assistants in Fountain Valley

All 62 physician assistants in Fountain Valley · All physician assistants in California