Gary S. Chuang, M.D.
NPI 1013199868ActiveIndividual· Dermatology· Torrance, CA
Dermatology (M.D.) in Torrance, California, trained at Columbia University College of Physicians and Surgeons (class of 2005). 828 Medicare patients in 2024, $837,194 paid; nearly all of their 1,502 Part D prescriptions were generic (94%). Genzyme Corporation was the largest of 3 companies reporting payments in 2025, $101.54 in all, mostly food and beverage.
Overview
| NPI | 1013199868 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 4, 2007 |
| Last updated in NPPES | Mar 17, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 234002 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 828 |
|---|---|
| Services billed | 8,499 across 65 procedure codes |
| Paid by Medicare | $837,194 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,502 · 1,822 30-day fills |
|---|---|
| Patients | 597 |
| Total drug cost | $125,996 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Columbia University College of Physicians and Surgeons |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Dermatology |
Industry payments (Open Payments)
- 2025$101.54 · 4 payments from 3 companies
- 2024$564.95 · 12 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $34.37 | 1 |
| Novartis Pharmaceuticals Corporation | $33.72 | 1 |
| Galderma Laboratories, L.P. | $33.45 | 2 |
What the 2025 payments were for
- Food and Beverage$101.54 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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