Physician profile
John Leung
NPI 1447328711
$681,618.27
in general payments reported to CMS, 2019-2025
55 companies · $261K in 2025
The $261K reported for 2025 was more than what 99% of Gastroenterology (Internal Medicine) providers received nationally (typical 2025 total: $636).
Payments by year
General and research payments by program year, as reported to CMS.
General payments by year: 2019: $16K · 2020: $8,642 · 2021: $11K · 2022: $106K · 2023: $121K · 2024: $158K · 2025: $261K.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Compensation For Services Other Than Consulting, Including Serving As Faculty Or As A Speaker At A Venue Other Than A Continuing Education Program: $390K · Consulting Fee: $63K · Travel and Lodging: $45K · Food and Beverage: $22K · Education: $20K.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Compensation For Services Other Than Consulting, Including Serving As Faculty Or As A Speaker At A Venue Other Than A Continuing Education Program | $390,203.24 |
| Consulting Fee | $62,872.00 |
| Travel and Lodging | $44,526.84 |
| Food and Beverage | $21,946.93 |
| Education | $20,052.91 |
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. Research payments are listed separately below. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Genzyme Corporation | $257,057.67 | 2019-2025 | |
| Regeneron Healthcare Solutions, INC. | $219,202.04 | 2021-2025 | Dupixent |
| Abbvie INC. | $51,138.31 | 2020-2025 | |
| Takeda Pharmaceuticals U.S.A., INC. | $46,934.10 | 2020-2025 | Eohilia, Entyvio, Hyqvia |
| Intuitive Surgical, INC. | $33,870.57 | 2020-2023 | Da Vinci Surgical System |
| Regeneron Pharmaceuticals, INC. | $16,431.75 | 2021-2025 | Dupixent |
| Astrazeneca Pharmaceuticals Lp | $10,812.55 | 2019-2025 | Fasenra, Airsupra, Tezspire |
| Glaxosmithkline, LLC. | $9,634.49 | 2019-2025 | Nucala |
| Shire North American Group INC | $6,930.00 | 2019 | |
| Eli Lilly Export S.A. Puerto Rico Branch | $6,755.62 | 2019 | |
| Genentech USA, INC. | $5,847.08 | 2019-2024 | Xolair |
| E.R. Squibb & Sons, L.L.C. | $4,264.34 | 2024 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $1,646.42 | 2019-2025 | Xifaxan, Trulance, Relistor |
| Eli Lilly and Company | $1,388.34 | 2019 | |
| Celgene Corporation | $1,312.54 | 2021-2024 | Zeposia |
Show all 52 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Pfizer INC. | $1,215.01 | 2019-2025 | |
| Novartis Pharmaceuticals Corporation | $1,058.42 | 2021-2025 | |
| Qol Medical, LLC | $829.06 | 2022-2025 | Sucraid, Sucraid |
| Ardelyx, INC. | $560.41 | 2023-2025 | Ibsrela |
| Incyte Corporation | $490.54 | 2022-2025 | Opzelura |
| Csl Behring | $459.47 | 2019-2025 | Andembry, Haegarda, Hizentra |
| Biocryst US Sales Co., LLC | $406.66 | 2023-2025 | Orladeyo |
| Madrigal Pharmaceuticals | $385.87 | 2025 | Rezdiffra |
| Phathom Pharmaceuticals, INC. | $342.17 | 2024-2025 | Voquezna |
| Amgen INC. | $320.47 | 2022-2025 | Tezspire |
| Kaleo, INC. | $246.65 | 2021-2023 | Auvi-Q |
| Janssen Biotech, INC. | $197.76 | 2019-2025 | Tremfya, Stelara |
| Organon LLC | $186.37 | 2023-2025 | Hadlima, Vtama, Renflexis |
| Galderma Laboratories, L.P. | $180.05 | 2025 | Nemluvio |
| Intercept Pharmaceuticals, INC. | $173.57 | 2023 | Ocaliva |
| Alk-Abello, INC | $144.13 | 2019-2025 | Neffy, Odactra, Grastek |
| Leo Pharma INC. | $141.98 | 2023-2024 | Adbry |
| Aimmune Therapeutics, INC. | $124.33 | 2020-2025 | Vowst |
| Lilly USA, LLC | $99.02 | 2024-2025 | Omvoh |
| Gc Biopharma USA, INC. | $98.41 | 2024-2025 | Alyglo, Alyglo |
| Blueprint Medicines Corporation | $91.97 | 2023-2024 | Ayvakit |
| Redhill Biopharma INC. | $82.96 | 2022 | |
| Ferring Pharmaceuticals INC. | $81.77 | 2024-2025 | Rebyota |
| Pharming Healthcare, INC. | $66.62 | 2023-2025 | Ruconest |
| Ironwood Pharmaceuticals, INC | $54.76 | 2023 | Linzess |
| Optinose US, INC. | $52.86 | 2025 | |
| Celltrion USA INC. | $50.39 | 2024-2025 | Zymfentra, Vegzelma |
| Braintree Laboratories, INC. | $47.93 | 2021-2024 | Suflave, Sutab |
| Phadia US INC. | $36.77 | 2019-2023 | Immunocap |
| Gilead Sciences, INC. | $34.69 | 2025 | Livdelzi |
| Cycle Pharmaceuticals INC | $24.47 | 2025 | Sajazir |
| Vbi Vaccine (Delaware) INC. | $21.95 | 2022 | |
| Ars Pharmaceuticals Operations, INC. | $19.28 | 2025 | Neffy |
| Seqirus USA INC | $18.85 | 2025 | Fluad, Flucelvax |
| Invivyd INC | $17.56 | 2025 | Pemgarda |
| Uswm, LLC | $15.00 | 2021 | |
| Boston Scientific Corporation | $14.27 | 2023 | Orcapod |
3 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.
Research and ownership
$11,793.81 in research payments reported 2019-2025. Research payments are often institution-directed and tied to clinical trials: they are reported under a clinician's name but frequently go to a hospital or research organization, and usually reflect participation in medical research.
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw John Leung 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.