Marshall Grossman
Endocrinology, Diabetes & Metabolism · Irvine, CANPI 1770600116
Payments from drug & device makers
Across 335 payments — averaging $13.46 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$639
- AbbVie$614
- Lilly USA, LLC$555
- Novo Nordisk$328
- Merck$302
- AstraZeneca$282
- plus $2K from 21 others
What the payments were for
- Food & beverage$4,48399%
- Education$271%
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 |
|---|---|---|
| Amgen(2 entities) | 38 | $639 |
| AbbVie | 44 | $614 |
| Lilly USA, LLC | 69 | $555 |
| Novo Nordisk | 43 | $328 |
| Merck | 16 | $302 |
| AstraZeneca(2 entities) | 9 | $282 |
| Amarin Pharma, Inc. | 29 | $271 |
| Boehringer Ingelheim | 19 | $248 |
| IBSA Pharma Inc. | 9 | $186 |
| Johnson & Johnson | 12 | $146 |
| Sanofi-aventis U.S. LLC | 7 | $126 |
| Esperion Therapeutics, Inc. | 7 | $114 |
| Radius Health, Inc. | 4 | $88 |
| Insulet Corporation | 4 | $85 |
| Acerus Pharmaceuticals Corporation | 4 | $77 |
| Ipsen Biopharmaceuticals, Inc | 3 | $67 |
| Xeris Pharmaceuticals, Inc. | 2 | $55 |
| Dexcom, Inc. | 3 | $49 |
| Abbott | 2 | $49 |
| Mannkind Corporation | 2 | $42 |
| Bayer | 2 | $42 |
| Pfizer | 2 | $38 |
| Antares Pharma, Inc. | 1 | $27 |
| BD | 1 | $25 |
| Sun Pharmaceutical Industries Inc. | 1 | $23 |
| Ultragenyx Pharmaceutical Inc. | 1 | $18 |
| Medtronic | 1 | $14 |
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
$4,509 in reported general payments places this provider in the 65th percentile of 952 endocrinology, diabetes & metabolism providers in California.
See all endocrinology, diabetes & metabolism providers in California →
Other endocrinology, diabetes & metabolism in Irvine
- Jerrold OlefskySan Diego$26.5M
- Mark ChristiansenWalnut Creek$22.9M
- Timothy BaileyEscondido$22.3M
- Stanley HsiaLos Angeles$19.8M
- Juan FriasSan Diego$14.1M
- Paul NorwoodFresno$6.2M
- Athena Philis-Tsimikasla Jolla$6M
- David AhnNewport Beach$5.8M
- Shlomo MelmedLos Angeles$3.3M
- Leila ChaychiSan Carlos$3.2M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.