Tri T. Nguyen, MD
NPI 1427155829ActiveIndividual· Internal Medicine· Dallas, TX
Internal Medicine (MD) in Dallas, Texas, trained at University of Texas Southwestern Medical School at Dallas (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $663,799 for 5,971 claims, against $143,714 paid for services in 2024. Pfizer Inc. was the largest of 29 companies reporting payments in 2025, $2,603 in all, mostly food and beverage.
Overview
| NPI | 1427155829 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 20, 2006 |
| Last updated in NPPES | Feb 27, 2026 |
| Certified by provider | Feb 27, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | K9371 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| 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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 292 |
|---|---|
| Services billed | 27,936 across 68 procedure codes |
| Paid by Medicare | $143,714 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,971 · 14,339 30-day fills |
|---|---|
| Patients | 406 |
| Total drug cost | $663,799 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of Texas Southwestern Medical School at Dallas |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Internal Medicine |
Medical group
- Addison Internal Medicine PADallas, TX · 4 clinicians
Hospital affiliations
- Baylor University Medical CenterDallas, TX
- Medical City Dallas HospitalDallas, TX
- Medical City PlanoPlano, TX
- Texas Health Presbyterian Hospital DallasDallas, TX
Industry payments (Open Payments)
- 2025$2,603 · 135 payments from 29 companies
- 2024$2,876 · 153 payments from 35 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $262.94 | 12 |
| Cleerly, Inc. | $239.31 | 3 |
| Amgen Inc. | $207.45 | 14 |
| Novo Nordisk Inc | $186.04 | 12 |
| Astrazeneca Pharmaceuticals LP | $168.04 | 21 |
What the 2025 payments were for
- Food and Beverage$2,603 · 135 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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