Thuy Thanh Nguyen, M.D.
NPI 1811077787ActiveIndividual· Internal Medicine· Westminster, CA
Internal Medicine (M.D.) in Westminster, California, trained at University of Southern California Keck School of Medicine (class of 1995). Their prescriptions cost Medicare Part D more than their services did: $445,377 for 5,265 claims, against $35,035 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 2 companies reporting payments in 2025, $60.11 in all, mostly food and beverage.
Overview
| NPI | 1811077787 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 16, 2006 |
| Last updated in NPPES | Sep 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A62612 | CA |
| Pediatrics | 208000000X | A62612 | 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 - Pediatric Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 78 |
|---|---|
| Services billed | 468 across 2 procedure codes |
| Paid by Medicare | $35,035 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,265 · 8,460 30-day fills |
|---|---|
| Patients | 205 |
| Total drug cost | $445,377 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Pediatric Medicine |
| Secondary specialties | Internal Medicine |
Other facilities
- Maxcare HospiceHospice · Westminster, CA
Industry payments (Open Payments)
- 2025$60.11 · 3 payments from 2 companies
- 2024$16.48 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $31.23 | 2 |
| Glaxosmithkline, LLC. | $28.88 | 1 |
What the 2025 payments were for
- Food and Beverage$60.11 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 74 internal medicine physicians in Westminster · All internal medicine physicians in California