Michael T. Nguyen, MD
Internal Medicine (MD) with Permanente Medical Group Inc, practicing in Manteca, California. Part D covered 8,484 prescriptions written in 2024, 89% of them generic. Lilly USA, LLC reported $109.22 in payments in 2025, 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 | 1871671685 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 1, 2006 |
| Last updated in NPPES | Dec 13, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A66359 | 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 | Michael Minh Nguyen · General Practice | 1128b14 | Sep 20, 2006 | Milpitas, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 - Internal Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 8,484 · 20,411 30-day fills |
|---|---|
| Patients | 956 |
| Total drug cost | $431,967 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Industry payments (Open Payments)
- 2025$109.22 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $109.22 | 1 |
What the 2025 payments were for
- Food and Beverage$109.22 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 internal medicine physicians in Manteca · All internal medicine physicians in California