Physician profile
David M Chang
NPI 1073596342
$7,803.04
in general payments reported to CMS, 2019-2025
44 companies · $726 in 2025
The $726 reported for 2025 was more than what 80% of Internal Medicine providers received nationally (typical 2025 total: $156).
Payments by year
General payments by program year, as reported to CMS.
General payments by year: 2019: $1,178 · 2020: $1,250 · 2021: $1,451 · 2022: $1,432 · 2023: $972 · 2024: $795 · 2025: $726.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Food and Beverage: $2,492.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Food and Beverage | $2,492.04 |
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 |
|---|---|---|---|
| Glaxosmithkline, LLC. | $1,733.71 | 2019-2025 | Trelegy Ellipta, Nucala, Arexvy |
| Boehringer Ingelheim Pharmaceuticals, INC. | $1,063.18 | 2019-2024 | Spiriva Respimat, Ofev, Stiolto Respimat |
| Astrazeneca Pharmaceuticals LP | $728.31 | 2019-2025 | Tezspire, Fasenra |
| Regeneron Healthcare Solutions, INC. | $659.38 | 2019-2024 | Dupixent |
| Pfizer INC. | $401.03 | 2019-2025 | |
| Genzyme Corporation | $355.82 | 2021-2025 | |
| Mylan Specialty L.P. | $313.73 | 2019-2024 | Yupelri |
| Actelion Pharmaceuticals US, INC. | $307.48 | 2019-2023 | Opsumit, Uptravi |
| Grifols USA, LLC | $239.79 | 2023-2025 | Prolastin-C Liquid |
| Amgen INC. | $203.05 | 2020-2025 | Evenity, Prolia, Prolia |
| Takeda Pharmaceuticals U.S.A., INC. | $167.41 | 2021-2022 | |
| Insmed, INC. | $160.97 | 2020-2025 | Arikayce, Brinsupri |
| Paratek Pharmaceuticals, INC. | $152.87 | 2020-2021 | |
| Merck Sharp & Dohme LLC | $147.04 | 2019-2024 | Dificid, Zerbaxa, Recarbrio |
| Advanced Respiratory, INC | $125.67 | 2020-2021 |
Show all 44 companies
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 David 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.