Mark Nathan
Interventional Cardiology · Walnut Creek, CANPI 1013947670
Payments from drug & device makers
Across 218 payments — averaging $795.74 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boehringer Ingelheim$83K
- Lilly USA, LLC$39K
- Astellas Pharma US Inc$20K
- Boehringer Ingelheim International GmbH$9K
- Amgen$7K
- AstraZeneca$7K
- plus $10K from 12 others
What the payments were for
- Consulting fees$5,4003%
- Speaking & faculty fees$127,70981%
- Travel & lodging$20,03913%
- Food & beverage$4,9873%
- Education$1100%
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 |
|---|---|---|
| Boehringer Ingelheim | 85 | $82,521 |
| Lilly USA, LLC | 65 | $39,108 |
| Astellas Pharma US Inc | 15 | $19,968 |
| Boehringer Ingelheim International GmbH | 1 | $8,820 |
| Amgen | 7 | $6,785 |
| AstraZeneca | 12 | $6,622 |
| Sanofi US Services Inc. | 2 | $4,500 |
| Amarin Pharma, Inc. | 1 | $1,906 |
| ZOLL Services LLC (a/k/a ZOLL Lifecor Corp) | 5 | $1,648 |
| Medtronic | 6 | $819 |
| Pfizer | 9 | $351 |
| Heartflow, Inc. | 3 | $163 |
| Portola Pharmaceuticals, LLC | 1 | $132 |
| Biotronik Inc. | 1 | $39 |
| Johnson & Johnson | 2 | $39 |
| Merck | 1 | $22 |
| Terumo Medical Corporation | 1 | $15 |
| Boston Scientific | 1 | $13 |
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
$173,471 in reported general payments places this provider in the 85th percentile of 585 interventional cardiology providers in California.
Other interventional cardiology in Walnut Creek
- Andrew DublinWalnut Creek$444K
- Rajendra MakkarWest Hollywood$16.6M
- Fahed BitarCovina$9.9M
- Rahul SharmaStanford$6.6M
- Matthew Pricela Jolla$5.8M
- David LeeStanford$5.7M
- Saibal KarThousand Oaks$5.4M
- Mehrdad ArianiNorthridge$5M
- Frederick St GoarMountain View$4.2M
- Sammy ElmariahSan Francisco$4.2M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.