Tien Quang Nguyen, MD
NPI 1396741351ActiveIndividual· Dermatology· Fountain Valley, CA
Dermatology (MD) in Fountain Valley, California, trained at University of Florida College of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $7,244,213 for 4,181 claims, against $709,364 paid for services in 2024. Leo Pharma Inc. was the largest of 20 companies reporting payments in 2025, $296,700 in all, mostly speaking and faculty fees.
Overview
| NPI | 1396741351 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 24, 2005 |
| Last updated in NPPES | Apr 1, 2025 |
| Certified by provider | Apr 1, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | G50454 | CA |
| Dermatology | 207N00000X | 20979 | NV |
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); Practitioner - Dermatology (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,593 |
|---|---|
| Services billed | 14,943 across 83 procedure codes |
| Paid by Medicare | $709,364 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,181 · 4,504 30-day fills |
|---|---|
| Patients | 1,216 |
| Total drug cost | $7,244,213 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | University of Florida College of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Dermatology |
Medical groups
- First Oc Dermatology PCFountain Valley, CA · 13 clinicians
- Tien Q Nguyen MD Dermatology Prof CorpHenderson, NV · 2 clinicians
Industry payments (Open Payments)
- 2025$296,700 · 407 payments from 20 companies
- 2024$267,816 · 488 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Leo Pharma Inc. | $40,078 | 41 |
| Arcutis Biotherapeutics, Inc. | $34,813 | 36 |
| Genzyme Corporation | $34,636 | 26 |
| Galderma Laboratories, L.P. | $33,355 | 44 |
| E.R. Squibb & Sons, L.L.C. | $23,799 | 27 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$207,442 · 69 payments
- Consulting Fee$53,595 · 18 payments
- Travel and Lodging$18,804 · 59 payments
- Food and Beverage$10,259 · 259 payments
- Honoraria$6,600 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Dermatology providers in Fountain Valley
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