Derek Y. Hsu, MD
NPI 1477944841ActiveIndividual· Dermatology· Santa Ana, CA
Dermatology (MD) in Santa Ana, California, trained at Northwestern University Feinberg Medical School (class of 2017). Their prescriptions cost Medicare Part D more than their services did: $430,146 for 1,218 claims, against $82,011 paid for services in 2024. Genzyme Corporation was the largest of 16 companies reporting payments in 2025, $3,039 in all, mostly food and beverage.
Overview
| NPI | 1477944841 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 6, 2015 |
| Last updated in NPPES | Aug 24, 2026 |
| Certified by provider | Aug 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A172646 | CA |
| Dermatology | 207N00000X | 125070649 | IL |
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 | 206 |
|---|---|
| Services billed | 852 across 68 procedure codes |
| Paid by Medicare | $82,011 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,218 · 1,357 30-day fills |
|---|---|
| Patients | 380 |
| Total drug cost | $430,146 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Dermatology |
Medical group
- J Robert West MD IncLas Vegas, NV · 138 clinicians
Industry payments (Open Payments)
- 2025$3,039 · 122 payments from 16 companies
- 2024$2,267 · 99 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $667.74 | 11 |
| Novartis Pharmaceuticals Corporation | $505.48 | 24 |
| Galderma Laboratories, L.P. | $394.43 | 18 |
| Abbvie Inc. | $341.64 | 22 |
| Incyte Corporation | $280.48 | 12 |
What the 2025 payments were for
- Food and Beverage$3,039 · 122 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Dermatology providers in Santa Ana
- 1568730885
- 1811403298
- 1770993347
- 1386629905
- 1730411794
- 1982686333
- 1639816382
- 1437354289
- 1386819241
- 1619052248
- 1831147024
- 1346408226