Anne Chang, MD
Dermatology · Stanford, CANPI 1013049188
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (58.6%), grants and travel and lodging — rather than concentrated in one kind of arrangement. 8 manufacturers reported payments, led by Galderma Laboratories, L.p. at 39.8% of the total. Among dermatology clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 107 payments — averaging $994.78 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Galderma Laboratories, L.p.$42K
- Regeneron$25K
- Sun Pharmaceutical Industries Inc.$21K
- Merck$10K
- AbbVie$5K
- Regeneron Healthcare Solutions, Inc.$3K
- plus $38 from 2 others
Across 438 payments — averaging $4665.03 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Regeneron$1.1M
- Merck$967K
- F. Hoffmann-la Roche AG$1K
- Genentech, Inc.$753
- Novartis$37
What the payments were for
- Consulting fees$62,35059%
- Speaking & faculty fees$4,0004%
- Grants$25,49424%
- Travel & lodging$12,17011%
- Food & beverage$2,4122%
- Education$150%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Galderma Laboratories, L.p. | 34 | $42,337 |
| Regeneron | 25 | $25,243 |
| Sun Pharmaceutical Industries Inc. | 22 | $20,727 |
| Merck | 14 | $10,121 |
| AbbVie | 8 | $5,094 |
| Regeneron Healthcare Solutions, Inc. | 2 | $2,882 |
| EMD Serono, Inc. | 1 | $23 |
| Pfizer | 1 | $15 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
How this compares
$106,441 in reported general payments places this provider in the 95th percentile of 1,875 dermatology providers in California.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Humira PenAdalimumab | 14 | $95,486 |
| Dupixent SyringeDupilumab | 17 | $60,787 |
| Fluorouracil | 32 | $3,416 |
| Clindamycin Phosphate | 34 | $1,213 |
| Metronidazole | 17 | $949 |
| Fluocinonide | 21 | $899 |
| Ketoconazole | 44 | $535 |
| Triamcinolone Acetonide | 39 | $525 |
| ValacyclovirValacyclovir Hcl | 14 | $480 |
| Doxycycline Hyclate | 12 | $448 |
| CiclopiroxCiclopirox Olamine | 12 | $383 |
| Hydrocortisone | 20 | $82 |
| Minoxidil | 11 | $79 |
Paid to pharmacies, not to this prescriber.
Other dermatology in Stanford
- Matthew LewisStanford$442K
- Justin KoStanford$237K
- David FiorentinoStanford$166K
- Paul YamauchiSanta Monica$2.9M
- Jennifer SoungSanta Ana$2.8M
- Robert GreenbergLivermore$2.6M
- Neal BhatiaSan Diego$2.5M
- April ArmstrongLos Angeles$2.3M
- Jeffrey CrowleyBakersfield$2.1M
- Jashin WuCorona$2M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.