Thanh Minh Nguyen, MD
Internal Medicine, Nephrology (MD) in Garden Grove, California, trained at University of California, Irvine, California College of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $1,513,916 for 7,078 claims, against $98,720 paid for services in 2024. Amgen Inc. was the largest of 20 companies reporting payments in 2025, $3,904 in all, mostly food and beverage. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1508885625 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 19, 2006 |
| Last updated in NPPES | Oct 3, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | G56554 | CA |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Thanh Ngoc Nguyen · Personal Care Provid | 1128a1 | Jul 20, 2017 | Elk Grove, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | Possible (name) | See above |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 174 |
|---|---|
| Services billed | 1,731 across 14 procedure codes |
| Paid by Medicare | $98,720 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,078 · 11,039 30-day fills |
|---|---|
| Patients | 249 |
| Total drug cost | $1,513,916 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | University of California, Irvine, California College of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Nephrology |
Industry payments (Open Payments)
- 2025$3,904 · 43 payments from 20 companies
- 2024$3,534 · 48 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $1,216 | 13 |
| Lilly USA, LLC | $482.54 | 4 |
| Astrazeneca Pharmaceuticals LP | $361.35 | 3 |
| Abbott Laboratories | $159.13 | 1 |
| Gilead Sciences, Inc. | $150.00 | 1 |
What the 2025 payments were for
- Food and Beverage$3,729 · 42 payments
- Consulting Fee$175.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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