Benjamin Tan, MD
Medical Oncology · Saint Louis, MONPI 1275551814
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 3 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 3 manufacturers reported payments, led by Boston Scientific at 39.2% of the total. That places this record below the midpoint for medical oncology clinicians in MO, where the typical reported total is $3,595.
Across 3 payments — averaging $93.81 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$110
- TELA Bio, Inc.$96
- Lemaitre Vascular, Inc.$75
Across 212 payments — averaging $8441.36 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.
- Genentech, Inc.$651K
- AstraZeneca$464K
- AbbVie$187K
- Exelixis Inc.$146K
- GSK$98K
- E.r. Squibb & Sons, L.L.C.$75K
- plus $168K from 4 others
What the payments were for
- Food & beverage$281100%
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 |
|---|---|---|
| Boston Scientific | 1 | $110 |
| TELA Bio, Inc. | 1 | $96 |
| Lemaitre Vascular, Inc. | 1 | $75 |
How this compares
$281 in reported general payments places this provider in the 20th 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Imatinib Mesylate | 20 | $53,826 |
| EliquisApixaban | 42 | $29,050 |
| CreonLipase/Protease/Amylase | 11 | $14,721 |
| Enoxaparin Sodium | 24 | $8,905 |
| XareltoRivaroxaban | 11 | $5,517 |
| Prochlorperazine Maleate | 47 | $1,012 |
| Ondansetron Hcl | 47 | $685 |
| Gabapentin | 52 | $659 |
| Oxycodone Hcl | 27 | $623 |
| Lidocaine-PrilocaineLidocaine/Prilocaine | 34 | $475 |
| LoperamideLoperamide Hcl | 11 | $286 |
| Levothyroxine Sodium | 25 | $251 |
| Pantoprazole Sodium | 24 | $210 |
| Vitamin D2Ergocalciferol (Vitamin D2) | 16 | $153 |
| Prednisone | 33 | $135 |
Paid to pharmacies, not to this prescriber.
Other medical oncology in Saint Louis
- Brad KahlSaint Louis$336K
- Russell PachynskiSaint Louis$226K
- Mark SchroederSaint Louis$198K
- George AnsstasSaint Louis$189K
- Ravi VijSaint Louis$153K
- Douglas AdkinsSaint Louis$141K
- Milan ChhedaSaint Louis$105K
- Maurice WillisSaint Louis$101K
- Moh'd KhushmanSaint Louis$84K
- Camille AbboudSaint Louis$70K
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.