Physician profile
Tom S Chang
NPI 1609848969
$870.63
in general payments reported to CMS, 2019-2025
10 companies · $148 in 2025
The $148 reported for 2025 was less than what a typical Retina Specialist provider received nationally (typical 2025 total: $460).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $80.51 · 2020: $120 · 2021: $107 · 2022: $21.19 · 2023: $136 · 2024: $258 · 2025: $148.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $458 · Travel and Lodging: $84.04.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $458.31 |
| Travel and Lodging | $84.04 |
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 |
|---|---|---|---|
| Stryker Corporation | $194.62 | 2019-2023 | Prostep |
| Bausch & Lomb Americas INC. | $174.35 | 2024 | Stellaris |
| Gilead Sciences, INC. | $147.88 | 2025 | |
| Alimera Sciences, INC. | $119.78 | 2020 | |
| International Life Sciences | $84.04 | 2024 | Flexband |
| Bausch & Lomb, A Division of Bausch Health US, LLC | $79.80 | 2021 | |
| Genentech USA, INC. | $48.19 | 2021-2022 | |
| Topcon Healthcare Solutions, INC. | $21.97 | 2019 |
2 companies reported research payments only; those appear in the research section below.
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 Tom 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.
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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.