Catherine Nhy Nguyen, PA-C
NPI 1326316076ActiveIndividual· Physician Assistant· Westminster, CA
Physician Assistant (PA-C) with Westminster Medical Office Inc, practicing in Westminster, California. Part D covered 9,832 prescriptions written in 2024, 81% of them generic. Amgen Inc. was the largest of 15 companies reporting payments in 2025, $2,305 in all, mostly food and beverage.
Overview
| NPI | 1326316076 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Dec 9, 2011 |
| Last updated in NPPES | Nov 1, 2023 |
| Certified by provider | Nov 1, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA21907 | CA |
| Internal Medicine, Adolescent Medicine | 207RA0000X | A69222 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Physician Assistant (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 9,832 · 21,298 30-day fills |
|---|---|
| Patients | 648 |
| Total drug cost | $1,720,388 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Westminster Medical Office IncWestminster, CA · 2 clinicians
Industry payments (Open Payments)
- 2025$2,305 · 68 payments from 15 companies
- 2024$1,155 · 52 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $500.60 | 11 |
| Gilead Sciences, Inc. | $456.24 | 9 |
| Lilly USA, LLC | $273.85 | 4 |
| Bayer Healthcare Pharmaceuticals Inc. | $256.88 | 9 |
| Astrazeneca Pharmaceuticals LP | $205.28 | 10 |
What the 2025 payments were for
- Food and Beverage$2,305 · 68 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 31 physician assistants in Westminster · All physician assistants in California