Physician profile
John C Chang
NPI 1669669164
$1,515.78
in general payments reported to CMS, 2019-2025
6 companies · $735 in 2025
The $735 reported for 2025 was more than what 82% of Diagnostic Radiology providers received nationally (typical 2025 total: $112).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $19.50 · 2021: $77.60 · 2023: $24.15 · 2024: $660 · 2025: $735.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $759 · Travel and Lodging: $660.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $758.74 |
| Travel and Lodging | $659.94 |
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 |
|---|---|---|---|
| Profound Medical Corp. | $856.19 | 2024-2025 | Tulsa-Pro |
| Icotec Medical INC. | $487.11 | 2025 | Vader Pedicle System 6.0, Screw, Carbon/Peek, Polyax., Fen., O 5.5 X 45 Mm, Kong-Tl Vbr, End Plate, Round, L and Screw, 12 X 43 Mm, Vader Pedicle System, Rod, Carbon/Peek, Curved, 6.0 R450 X 200 Mm |
| Astellas Pharma US INC | $77.60 | 2021 | |
| Angiodynamics, INC. | $51.23 | 2025 | Venacure 1470 Pro |
| Visionrt, INC. | $24.15 | 2023 | |
| Siemens Medical Solutions USA, INC. | $19.50 | 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 John Chang 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.
Share this page
Keep an eye on this page
Get an email when the next June refresh changes this page. No account needed.
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.