Ethan-Quan H. Nguyen, MD
NPI 1104828508ActiveIndividual· Dermatology, Procedural Dermatology· Riverside, CA
Dermatology, Procedural Dermatology (MD) in Riverside, California, trained at Georgetown University School of Medicine (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $413,545 for 619 claims, against $270,221 paid for services in 2024. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $2,350 in all, mostly food and beverage.
Overview
| NPI | 1104828508 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 15, 2005 |
| Last updated in NPPES | Aug 1, 2013 |
| Reactivated | May 5, 2006 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology, Procedural Dermatology Primary | 207NS0135X | G77748 | 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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 394 |
|---|---|
| Services billed | 2,728 across 61 procedure codes |
| Paid by Medicare | $270,221 |
Part D prescriptions in 2024
| Prescriptions (claims) | 619 · 705 30-day fills |
|---|---|
| Patients | 220 |
| Total drug cost | $413,545 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Georgetown University School of Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Dermatology |
Industry payments (Open Payments)
- 2025$2,350 · 99 payments from 15 companies
- 2024$2,416 · 121 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $810.95 | 42 |
| Janssen Biotech, Inc. | $290.36 | 8 |
| Incyte Corporation | $255.12 | 9 |
| Leo Pharma Inc. | $204.74 | 15 |
| Lilly USA, LLC | $147.02 | 2 |
What the 2025 payments were for
- Food and Beverage$2,157 · 96 payments
- Education$193.64 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Dermatology, Procedural Dermatology providers in Riverside
- 1588612816
- 1427893767
- 1508940644
All Dermatology, Procedural Dermatology providers in California →