Nader Kamangar
Critical Care Medicine · Walnut Creek, CANPI 1922093285
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $1,773 of the $1,987 with a category attached, or 89.2%. It is spread thinly across 21 manufacturers, the largest accounting for just 15.5% — the pattern of someone who eats at a lot of different presentations. 2025 is the largest year on record at $833, 2.1 times the $398 reported in 2019.
Across 74 payments — averaging $26.85 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Bayer$308
- Amgen$210
- Actelion Pharmaceuticals US, Inc.$200
- Insmed, Inc.$187
- Boehringer Ingelheim$163
- United Therapeutics Corporation$159
- plus $760 from 15 others
Across 3 payments — averaging $10,516 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.
- Neuraxis, Inc.$32K
What the payments were for
- Consulting fees$20010%
- Food & beverage$1,77389%
- Education$141%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Bayer | 6 | $308 |
| Amgen | 9 | $210 |
| Actelion Pharmaceuticals US, Inc. | 12 | $200 |
| Insmed, Inc. | 7 | $187 |
| Boehringer Ingelheim | 5 | $163 |
| United Therapeutics Corporation | 5 | $159 |
| Merck | 5 | $132 |
| Johnson & Johnson | 6 | $130 |
| La Jolla Pharmaceutical Company | 2 | $55 |
| GSK | 2 | $53 |
| Gilead | 3 | $51 |
| Medtronic | 1 | $49 |
| Philips North America LLC | 2 | $43 |
| Viatris Specialty LLC | 2 | $42 |
| Atos Medical Inc | 1 | $36 |
| Baxter Healthcare | 1 | $35 |
| Astellas Pharma US Inc | 1 | $33 |
| Olympus America Inc. | 1 | $30 |
| Nabriva Therapeutics, PLC | 1 | $25 |
| Genentech USA, Inc. | 1 | $23 |
| Mylan Specialty L.p. | 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.
- Adempas$200
How this compares
$1,987 in reported general payments places this provider in the 75th percentile of 715 critical care medicine providers in California.
Other critical care medicine in Walnut Creek
- Cedric Franklin RutlandRiverside$3.2M
- Chinh PhanSacramento$467K
- Timothy AlbertsonSacramento$418K
- Stephen ChenMonterey Park$394K
- Bassam YaghmourOrange$376K
- Xuanha WhiteSan Diego$343K
- Ken YonedaSacramento$173K
- Praveen AkuthotaSan Diego$169K
- Ivan ChengSan Francisco$162K
- Brian ShermanOxnard$147K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.