David Rayhan, MD
Dermatology · Huntington Beach, CANPI 1275857898
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $5,840 of the $9,120 with a category attached, or 64.0%. Incyte Corporation accounts for 85.5% of it on its own, with 7 other manufacturers making up the rest. Reporting peaked in 2022 at $7,801 and has fallen 92.6% since, to $574 in 2025.
Across 28 payments — averaging $325.72 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Incyte Corporation$8K
- Galderma Laboratories, L.p.$449
- AstraZeneca$256
- Boehringer Ingelheim$241
- Amgen$172
- Apellis Pharmaceuticals, Inc.$124
- plus $78 from 2 others
Across 891 payments — averaging $5837.22 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.
- Incyte Corporation$3.5M
- Pfizer$1.2M
- Sanofi US Services Inc.$349K
- Sun Pharmaceutical Industries Inc.$66K
- Kyowa Kirin Pharmaceutical Development, Inc$51K
- E.r. Squibb & Sons, L.L.C.$14K
- plus $16K from 2 others
What the payments were for
- Consulting fees$1,72019%
- Speaking & faculty fees$5,84064%
- Travel & lodging$180%
- Food & beverage$1,44416%
- Education$991%
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 |
|---|---|---|
| Incyte Corporation | 10 | $7,801 |
| Galderma Laboratories, L.p. | 4 | $449 |
| AstraZeneca(2 entities) | 2 | $256 |
| Boehringer Ingelheim | 2 | $241 |
| Amgen | 3 | $172 |
| Apellis Pharmaceuticals, Inc. | 1 | $124 |
| Regeneron | 1 | $45 |
| Pfizer | 5 | $33 |
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
$9,120 in reported general payments places this provider in the 80th 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 |
|---|---|---|
| StelaraUstekinumab | 14 | $341,125 |
| Humira(Cf) PenAdalimumab | 14 | $163,480 |
| Tacrolimus | 19 | $3,790 |
| Fluorouracil | 63 | $3,537 |
| Ketoconazole | 199 | $2,941 |
| Clobetasol Propionate | 71 | $2,554 |
| Betamethasone Diprop AugmentedBetamethasone/Propylene Glyc | 87 | $2,106 |
| Metronidazole | 32 | $704 |
| Doxycycline Monohydrate | 38 | $545 |
| Gentamicin Sulfate | 13 | $447 |
| Triamcinolone Acetonide | 58 | $425 |
| Nystatin | 20 | $362 |
| Betamethasone Dipropionate | 11 | $331 |
| Terbinafine Hcl | 18 | $217 |
| Hydrocortisone | 35 | $209 |
Paid to pharmacies, not to this prescriber.
Other dermatology in Huntington Beach
- 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
- Raja SivamaniSacramento$1.9M
- Tien NguyenFountain Valley$1.2M
- Tina BhutaniSan Francisco$1.1M
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.