April Armstrong, MD
Dermatology · Los Angeles, CANPI 1356477087
Payments from drug & device makers
Across 1,919 payments — averaging $3206.48 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Pfizer$632K
- Amgen$625K
- Takeda Pharmaceuticals U.S.A., Inc.$532K
- Janssen Research & Development, LLC$518K
- E.r. Squibb & Sons, L.L.C.$443K
- AbbVie$399K
- plus $3M from 38 others
Across 105 payments — averaging $1744.20 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.
- Novartis$38K
- Pfizer$26K
- UCB, Inc.$25K
- Regeneron$21K
- Amgen$21K
- Kyowa Kirin Pharmaceutical Development, Inc$19K
- plus $33K from 6 others
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.
How this compares
$6,153,229 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.
Other dermatology in Los Angeles
- Howard SofenLos Angeles$16.1M
- Christopher HoLos Angeles$2M
- Pearl GrimesLos Angeles$1.6M
- Jonathan CotliarLos Angeles$1.4M
- Jennifer HsiaoLos Angeles$1.1M
- Derek JonesLos Angeles$1.1M
- Roger LoLos Angeles$727K
- Vivian LaquerIrvine$20.9M
- Raja SivamaniSacramento$11.8M
- Jennifer SoungSanta Ana$10.3M
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.