Robert Tri Nguyen, MD
NPI 1780775718ActiveIndividual· Internal Medicine· Oxnard, CA
Internal Medicine (MD) with Inpatient Specialists of California PC, practicing in Oxnard, California. In 2024 Medicare paid $130,506 for 446 patients, and Part D covered 1,049 of their prescriptions, 84% of them generic. Boston Scientific Corporation was the largest of 4 companies reporting payments in 2025, $525.92 in all, mostly food and beverage. Lists St Johns Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1780775718 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 27, 2006 |
| Last updated in NPPES | Jan 31, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A89952 | 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 - Hospitalist (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 446 |
|---|---|
| Services billed | 1,390 across 9 procedure codes |
| Paid by Medicare | $130,506 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,049 · 1,435 30-day fills |
|---|---|
| Patients | 285 |
| Total drug cost | $80,533 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Hospitalist |
| Secondary specialties | General Practice, Internal Medicine |
Medical group
- Inpatient Specialists of California PCOakdale, CA · 385 clinicians
Hospital affiliation
- St Johns Regional Medical CenterOxnard, CA
Other facilities
- Vitas Healthcare Corporation of CaliforniaHospice · San Diego, CA
- Vitas Healthcare Corporation of CaliforniaHospice · Encino, CA
Industry payments (Open Payments)
- 2025$525.92 · 6 payments from 4 companies
- 2024$428.44 · 6 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $379.32 | 3 |
| Abbott Laboratories | $100.00 | 1 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $26.00 | 1 |
| W. L. Gore & Associates, Inc. | $20.60 | 1 |
What the 2025 payments were for
- Food and Beverage$525.92 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 50 internal medicine physicians in Oxnard · All internal medicine physicians in California