Brian Greenberg
Pediatric Allergy/Immunology · Tarzana, CANPI 1821023201
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $43,463 of the $45,200 with a category attached, or 96.2%. Henry Schein, Inc. accounts for 96.2% of it on its own, with 19 other manufacturers making up the rest. Reporting peaked in 2022 at $16,119 and has fallen 96.8% since, to $518 in 2025. Among pediatric allergy/immunology clinicians in CA with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 84 payments — averaging $538.10 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Henry Schein, Inc.$43K
- AstraZeneca$340
- Pfizer$262
- Amgen$193
- Sanofi Pasteur Inc.$135
- Novartis$124
- plus $684 from 14 others
What the payments were for
- Speaking & faculty fees$43,46396%
- Food & beverage$1,7374%
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 |
|---|---|---|
| Henry Schein, Inc. | 25 | $43,463 |
| AstraZeneca | 12 | $340 |
| Pfizer | 9 | $262 |
| Amgen | 6 | $193 |
| Sanofi Pasteur Inc. | 1 | $135 |
| Novartis | 5 | $124 |
| Merck | 5 | $113 |
| Circassia Inc. | 4 | $97 |
| GSK | 2 | $58 |
| ARS Pharmaceuticals Operations, Inc. | 2 | $56 |
| Abbott | 1 | $52 |
| Phadia US Inc. | 2 | $49 |
| Jubilant Hollisterstier LLC | 1 | $45 |
| Alk-abello, Inc | 2 | $42 |
| Biocryst US Sales Co., LLC | 1 | $39 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $35 |
| Cranial Technologies, Inc | 2 | $32 |
| Azurity Pharmaceuticals, Inc. | 1 | $24 |
| Regeneron Healthcare Solutions, Inc. | 1 | $23 |
| Biofire Diagnostics, LLC | 1 | $18 |
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
$45,200 in reported general payments places this provider in the 90th percentile of 48 pediatric allergy/immunology providers in California.
See all pediatric allergy/immunology providers in California →
Other pediatric allergy/immunology in Tarzana
- Manish ButteLos Angeles$357K
- Barbara AriueSan Bernardino$112K
- Peck OngLos Angeles$83K
- Christopher LandonVentura$60K
- Alejandro Dorenbaum-KracerPalo Alto$42K
- Maria Garcia-LloretLos Angeles$39K
- Talal ChatilaLos Angeles$30K
- Morna DorseySan Francisco$29K
- Ewald StiehmLos Angeles$24K
- Matthew KanSan Francisco$16K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.