Physician profile
Jack C Chang
NPI 1811182041
$640.43
in general payments reported to CMS, 2019-2025
11 companies · $40.34 in 2025
The $40.34 reported for 2025 was less than what a typical Internal Medicine provider received nationally (typical 2025 total: $156).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $247 · 2020: $159 · 2021: $50.63 · 2022: $23.25 · 2023: $68.20 · 2024: $51.49 · 2025: $40.34.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $160.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $160.03 |
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 |
|---|---|---|---|
| Lilly USA, LLC | $274.35 | 2019-2025 | Mounjaro, Zepbound |
| Glaxosmithkline, LLC. | $75.11 | 2019-2025 | Trelegy Ellipta, Arexvy |
| Abbvie INC. | $68.20 | 2023 | Vraylar |
| Allergan, INC. | $59.29 | 2020 | |
| Pfizer INC. | $56.61 | 2019-2020 | |
| Gilead Sciences, INC. | $23.25 | 2022 | |
| Amgen INC. | $22.34 | 2019 | |
| Novo Nordisk INC | $19.84 | 2024 | Rybelsus, Ozempic |
| Intercept Pharmaceuticals, INC. | $17.92 | 2020 | |
| Strongbridge US INC. | $12.23 | 2020 | |
| Ironwood Pharmaceuticals, INC | $11.29 | 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 Jack 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.