Tamuyen Nguyen, M.D.
NPI 1710041686ActiveIndividual· Dermatology· Upland, CA
Dermatology (M.D.) in Upland, California, trained at University of Missouri, Kansas City, School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $214,401 for 283 claims, against $43,390 paid for services in 2024. Abbvie Inc. was the largest of 10 companies reporting payments in 2025, $1,348 in all, mostly food and beverage.
Overview
| NPI | 1710041686 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 21, 2006 |
| Last updated in NPPES | Aug 8, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A80098 | CA |
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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 174 |
|---|---|
| Services billed | 2,199 across 18 procedure codes |
| Paid by Medicare | $43,390 |
Part D prescriptions in 2024
| Prescriptions (claims) | 283 · 328 30-day fills |
|---|---|
| Patients | 79 |
| Total drug cost | $214,401 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Missouri, Kansas City, School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Dermatology |
Medical group
- Advanced Skin Clinic and Surgery PCUpland, CA · 2 clinicians
Hospital affiliation
- San Antonio Regional HospitalUpland, CA
Industry payments (Open Payments)
- 2025$1,348 · 59 payments from 10 companies
- 2024$1,308 · 63 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $365.39 | 21 |
| Leo Pharma Inc. | $187.12 | 9 |
| Pfizer Inc. | $177.86 | 9 |
| Biofrontera Inc. | $147.00 | 5 |
| Janssen Biotech, Inc. | $146.95 | 5 |
What the 2025 payments were for
- Food and Beverage$1,249 · 57 payments
- Education$99.17 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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