William Warren Kwan, MD
NPI 1376504407ActiveIndividual· Dermatology· Los Angeles, CA
Dermatology (MD) in Los Angeles, California, trained at University of California, Geffen School of Medicine (class of 1990). Part D covered 13 prescriptions written in 2024, 100% of them generic. Galderma Laboratories, L.P. was the largest of 16 companies reporting payments in 2025, $6,231 in all, mostly food and beverage.
Overview
| NPI | 1376504407 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 29, 2006 |
| Last updated in NPPES | Jul 9, 2025 |
| Certified by provider | Jul 9, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | G73605 | 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) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 13 · 17 30-day fills |
|---|---|
| Total drug cost | $259.87 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Dermatology |
| Telehealth | Offers telehealth |
Medical group
- Golden State Dermatology Associates, Inc.Saint Helena, CA · 125 clinicians
Industry payments (Open Payments)
- 2025$6,231 · 42 payments from 16 companies
- 2024$1,320 · 29 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Galderma Laboratories, L.P. | $2,743 | 4 |
| Lumenis Be Inc | $1,823 | 1 |
| Abbvie Inc. | $577.22 | 9 |
| Botanix Sb Inc | $193.79 | 6 |
| Organon LLC | $153.03 | 2 |
What the 2025 payments were for
- Food and Beverage$3,532 · 40 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$2,600 · 1 payment
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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