Michael Weiner
Nephrology · San Francisco, CANPI 1346359502
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $18,696 of the $24,414 with a category attached, or 76.6%. Merck accounts for 68.5% of it on its own, with 6 other manufacturers making up the rest. Reporting peaked in 2022 at $14,337 and has fallen 92.7% since, to $1,049 in 2025. Among nephrology 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 25 payments — averaging $976.57 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$17K
- Biogen$4K
- Acadia Pharmaceuticals Inc$2K
- GE HealthCare$1K
- Janssen Global Services, LLC$1K
- Eisai Inc.$321
- plus $22 from 1 others
Across 7 payments — averaging $61,679 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.
- Johnson & Johnson$373K
- Merck$30K
- Janssen Research & Development, LLC$25K
- 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 |
|---|---|---|
| Merck | 15 | $16,720 |
| 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
$24,414 in reported general payments places this provider in the 90th percentile of 1,341 nephrology providers in California.
Other nephrology in San Francisco
- Meyeon ParkSan Francisco$119K
- Raymond HsuSan Francisco$77K
- Fred LuiSan Francisco$68K
- Anjay RastogiLos Angeles$2.2M
- Glenn ChertowStanford$2M
- Luis AlvarezPalo Alto$1.8M
- Jose MorfinSacramento$1M
- Rodolfo BatarseRancho Mirage$910K
- Vandana MathurWoodside$769K
- Yasir QaziOrange$618K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.