Michael Weiner
Nephrology · San Francisco, CANPI 1346359502
Payments from drug & device makers
Across 31 payments — averaging $14,600 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Johnson & Johnson$373K
- Merck$47K
- Janssen Research & Development, LLC$25K
- Biogen$4K
- Acadia Pharmaceuticals Inc$2K
- GE HealthCare$1K
- plus $1K from 3 others
Across 1 payment — averaging $3570.80 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.
- Biogen$4K
What the payments were for
- Consulting fees$18,69677%
- Speaking & faculty fees$1,2005%
- Travel & lodging$3,70515%
- Food & beverage$8133%
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 |
|---|---|---|
| Johnson & Johnson | 3 | $373,180 |
| Merck | 17 | $46,720 |
| Janssen Research & Development, LLC | 1 | $25,000 |
| Biogen | 2 | $3,603 |
| Acadia Pharmaceuticals Inc | 1 | $1,500 |
| GE HealthCare | 1 | $1,200 |
| Janssen Global Services, LLC | 1 | $1,049 |
| Eisai Inc. | 4 | $321 |
| Genentech USA, Inc. | 1 | $22 |
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
$452,594 in reported general payments places this provider in the 95th percentile of 1,341 nephrology providers in California.
Other nephrology in San Francisco
- Meyeon ParkSan Francisco$1.2M
- Anjay RastogiLos Angeles$6.3M
- Aamir JamalSan Dimas$5.5M
- Mohamed El-ShahawyLos Angeles$4.4M
- Kalpesh PatelCalabasas$3.6M
- Jehad HaggiagiMission Hills$3.6M
- Malvin YanSouth Gate$3.3M
- Sohan DuaNorthridge$3.2M
- Richard LafayetteStanford$3M
- Anant DesaiGranada Hills$2.9M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.