Physician profile
May C Chen
NPI 1386603447
$318.64
in general payments reported to CMS, 2019-2025
5 companies · $94.68 in 2025
The $94.68 reported for 2025 was less than what a typical Medical Oncology provider received nationally (typical 2025 total: $1,158).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $15.20 · 2021: $53.76 · 2024: $155 · 2025: $94.68.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $220 · Education: $30.08.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $219.60 |
| Education | $30.08 |
Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.
Who reported paying
General payments only, as reported to CMS. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Astrazeneca Pharmaceuticals Lp | $176.02 | 2024-2025 | Lynparza, Enhertu |
| Acrotech Biopharma INC. | $53.76 | 2021 | |
| Daiichi Sankyo INC. | $47.43 | 2025 | Enhertu |
| Bayer Healthcare Pharmaceuticals INC. | $26.23 | 2024 | |
| Genzyme Corporation | $15.20 | 2019 |
Drugs and devices associated with these payments
CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw May Chen listed in the CMS Open Payments database. Can you tell me about your work with those companies?"
- "Is there a generic or alternative to this medication, and would it work as well for me?"
- "What made you choose this particular treatment for my situation?"
These are normal questions. A good clinician will welcome them.
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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.