Physician profile
William W Chou
NPI 1790713253
$1,664.56
in general payments reported to CMS, 2019-2025
16 companies · $193 in 2025
The $193 reported for 2025 was more than what a typical Radiation Oncology provider received nationally (typical 2025 total: $172).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $32.01 · 2020: $101 · 2021: $111 · 2022: $421 · 2023: $788 · 2024: $19.17 · 2025: $193.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Travel and Lodging: $581 · Food and Beverage: $419.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Travel and Lodging | $581.00 |
| Food and Beverage | $418.79 |
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 |
|---|---|---|---|
| Beigene USA, INC. | $458.00 | 2023 | Brukinsa |
| Inari Medical, INC. | $275.11 | 2022 | |
| Brainlab, INC. | $193.38 | 2020-2023 | Image Guided Surgical Device |
| Sumitomo Pharma America, INC. | $121.81 | 2023-2024 | Orgovyx |
| Intuitive Surgical, INC. | $99.79 | 2025 | |
| Myovant Sciences INC. | $96.72 | 2021-2022 | |
| Siemens Medical Solutions USA, INC. | $76.60 | 2023-2025 | Bravos Afterloader System, Varian Ethos Treatment Planning |
| Tactile Systems Technology INC | $69.94 | 2019-2020 | |
| Medtronic, INC. | $62.69 | 2021-2025 | Superlock |
| Pfizer INC. | $59.75 | 2021-2022 | |
| Pharmacyclics LLC, An Abbvie Company | $34.38 | 2022 | |
| Elekta, INC. | $27.39 | 2023 | Elekta Medical Linear Accelerator |
| Teleflex LLC | $24.42 | 2025 | Barrigel |
| Astrazeneca Pharmaceuticals Lp | $23.07 | 2020 | |
| Visionrt, INC. | $22.19 | 2021 |
Show all 16 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Varian Medical Systems, INC. | $19.32 | 2020 |
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 William Chou 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.