Reflects CMS Open Payments as of 2026-07-26T04:22:22Z. CMS updates this data on an annual cycle, and corrections or successful disputes made at CMS may not yet appear here. The official CMS record is authoritative for the current state. View the official CMS record ↗
Covered recipient · General Payments record
GREGORY H NGUYENDUC
Allopathic & Osteopathic Physicians Internal Medicine Gastroenterology
A name match is not confirmation of identity. CMS publishes records for different people under similar names; the NPI, specialty, and location shown on this page are the CMS-published fields that distinguish them.
General Payments · PY2019–2025
- CMS publication 2026-06-30
Other CMS categories — not shown on this page
Ownership and Investment Interests
CMS also publishes Ownership and Investment Interests as a separate dataset. This site does not currently mirror it, and no ownership figure is shown on this page. This provider appears in that dataset.
Ownership and investment interests are reported as the value of an interest held, not as a payment received. They are a different measure from the payment total on this page and are never combined with it.
These records are published by CMS and can be viewed on this provider’s official CMS record. View this provider on CMS Open Payments ↗
“Financial relationships do not necessarily indicate an improper relationship; the data is open to interpretation.”
— Centers for Medicare & Medicaid Services, Open Payments
A reported payment reflects a financial relationship a company disclosed. It does not indicate wrongdoing or a conflict of interest, and it says nothing about the quality of a provider's care.
These records are submitted to CMS and attested to by the reporting companies. CMS publishes them as reported; this site mirrors them without independent verification.
A payment attributed to a provider may have been made to a third party — a hospital, practice, or research institution — rather than paid to the provider personally.
How these totals are calculated
- This total is the sum of the individual General Payments record amounts CMS published for the labeled program year(s); each record amount is used unmodified. The total itself is computed by this site. Nothing is estimated, weighted, or combined across categories.
- General Payments only. Research and Ownership/Investment are separate datasets and are never summed with these figures; amounts are kept separate per program year.
- Featured-page threshold (a presentation gate, not a judgment): (records>=3 OR total>=100) AND records>=2 AND NPI identity (all years).
- Methodology & Data — sourcing, labeling, and limitations.
By nature of payment
PY2025 · sorted by reported total
| Nature of payment | Amount | Records |
|---|---|---|
| Food and Beverage | $2,327.23 | 109 |
| Education | $10.28 | 1 |
By paying entity
PY2025 · sorted by reported total
| Paying entity | Amount | Records |
|---|---|---|
| ABBVIE INC. | $404.55 | 19 |
| Janssen Biotech, Inc. | $320.26 | 15 |
| Takeda Pharmaceuticals U.S.A., Inc. | $298.92 | 13 |
| Madrigal Pharmaceuticals | $267.13 | 9 |
| Gilead Sciences, Inc. | $187.36 | 12 |
| PFIZER INC. | $144.99 | 14 |
| Novo Nordisk AS | $137.40 | 3 |
| Lilly USA, LLC | $118.00 | 6 |
| GENZYME CORPORATION | $76.81 | 2 |
| Ardelyx, Inc. | $75.73 | 3 |
| INTERCEPT PHARMACEUTICALS, INC. | $56.59 | 3 |
| Ipsen Biopharmaceuticals, Inc | $43.32 | 2 |
| Phathom Pharmaceuticals, Inc. | $35.90 | 2 |
| Alnylam Pharmaceuticals Inc. | $34.81 | 1 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $33.74 | 2 |
| Daiichi Sankyo Inc. | $29.39 | 1 |
| Regeneron Healthcare Solutions, Inc. | $26.83 | 1 |
| AIMMUNE THERAPEUTICS, INC. | $24.76 | 1 |
| Ferring Pharmaceuticals Inc. | $21.02 | 1 |
By program year
All program years on this page · sorted by year
Payment records · PY2025 (110)
Ordering applied by this site (date, newest first, then paying entity) · record values are shown as CMS published them
Source & provenance
- Dataset
- CMS Open Payments — General Payments
- Publisher of source data
- Centers for Medicare & Medicaid Services
- CMS publication date
- 2026-06-30
- Program years on this page
- 2019, 2020, 2021, 2022, 2023, 2024, 2025
- Source files
- Dataset page · Bulk file · PY2019 , PY2020 , PY2021 , PY2022 , PY2023 , PY2024 , PY2025
- Generated from
- OP_DTL_GNRL_PGYR2025_P06302026_06032026.csv
One page per canonical provider; split Profile_IDs are merged via Associated_Covered_Recipient_Profile_ID_1/_2 from the Covered Recipient Profile Supplement.
Corrections to the substance of a record route to CMS through its review-and-dispute process; errors in how this site mirrors or displays a record route to us. Both paths are described in Methodology & Data.
Cite this record.
Permalink https://industrypayments.org/provider/npi-1326016239
- Plain
- GREGORY H NGUYENDUC, NPI 1326016239. IndustryPayments, data edition 2026-07-26T04:22:22Z. https://industrypayments.org/provider/npi-1326016239.
- APA 7
- IndustryPayments. (2026). GREGORY H NGUYENDUC, NPI 1326016239 (Data edition 2026-07-26T04:22:22Z) [Data set]. https://industrypayments.org/provider/npi-1326016239
- Bluebook
- GREGORY H NGUYENDUC, NPI 1326016239, IndustryPayments (data edition 2026-07-26T04:22:22Z), https://industrypayments.org/provider/npi-1326016239.
Source: Centers for Medicare & Medicaid Services, Open Payments.