Benjamin Tan, MD
Medical Oncology · Saint Louis, MONPI 1275551814
Payments from drug & device makers
Across 215 payments — averaging $8324.88 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Genentech, Inc.$651K
- AstraZeneca$464K
- AbbVie$187K
- Exelixis Inc.$146K
- GSK$98K
- E.r. Squibb & Sons, L.L.C.$75K
- plus $168K from 7 others
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 |
|---|---|---|
| Genentech, Inc. | 15 | $651,031 |
| AstraZeneca | 31 | $464,101 |
| AbbVie | 28 | $187,240 |
| Exelixis Inc. | 48 | $145,990 |
| GSK | 12 | $97,631 |
| E.r. Squibb & Sons, L.L.C. | 8 | $75,368 |
| EMD Serono, Inc. | 38 | $55,705 |
| Takeda Pharmaceuticals U.S.A., Inc. | 7 | $49,398 |
| Boehringer Ingelheim International GmbH | 11 | $34,275 |
| Agios Pharmaceuticals, Inc. | 14 | $28,827 |
| Boston Scientific | 1 | $110 |
| TELA Bio, Inc. | 1 | $96 |
| Lemaitre Vascular, Inc. | 1 | $75 |
How this compares
$1,789,849 in reported general payments places this provider in the 75th percentile of 144 medical oncology providers in Missouri.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Other medical oncology in Saint Louis
- Nina Wagner JohnstonSaint Louis$22M
- Cynthia MaSaint Louis$22M
- Nancy BartlettSaint Louis$19.9M
- Douglas AdkinsSaint Louis$19.2M
- Ramaswamy GovindanSaint Louis$16.4M
- Kelly BoltonSaint Louis$14.5M
- Ravi VijSaint Louis$14.4M
- Daniel MorgenszternSaint Louis$12.8M
- Brad KahlSaint Louis$11.3M
- Russell PachynskiSaint Louis$8M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.