Payment overview · 2025
General Payments
$14,407.50
153 reported records · 20 companies
Healthcare provider profile · identity verified
Christopher Duong Bui, MD
Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology · SANTA ANA, CA · NPI 1811061468
Verified facts
What the public records show
CMS Open Payments records show Christopher Duong Bui, MD received $14,407.50 in general payments during 2025 across 153 reported records.
Gilead Sciences, Inc. accounted for 43.3% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 24 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Creon, Ibsrela, Linzess, Rezdiffra, Trulance, Vemlidy, Voquezna, Xifaxan, Zenpep.
ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported CREON as an associated drug or biological on 91561 records involving 20616 distinct recipient NPIs. Public Medicare Part D data also shows 1112 claims for Creon by this doctor in 2024.
ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 873 claims for Linzess by this doctor in 2024.
Aimmune Therapeutics, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ZENPEP as an associated drug or biological on 32144 records involving 12432 distinct recipient NPIs. Public Medicare Part D data also shows 820 claims for Zenpep by this doctor in 2024.
Ardelyx, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported IBSRELA as an associated drug or biological on 59980 records involving 18215 distinct recipient NPIs. Public Medicare Part D data also shows 44 claims for Ibsrela by this doctor in 2024.
Gilead Sciences, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Vemlidy as an associated drug or biological on 782 records involving 554 distinct recipient NPIs. Public Medicare Part D data also shows 841 claims for Vemlidy by this doctor in 2024.
Madrigal Pharmaceuticals reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported REZDIFFRA as an associated drug or biological on 75650 records involving 19195 distinct recipient NPIs. Public Medicare Part D data also shows 23 claims for Rezdiffra by this doctor in 2024.
Phathom Pharmaceuticals, Inc. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported VOQUEZNA as an associated drug or biological on 90302 records involving 33442 distinct recipient NPIs. Public Medicare Part D data also shows 212 claims for Voquezna by this doctor in 2024.
Salix Pharmaceuticals, a division of Bausch Health US, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRULANCE as an associated drug or biological on 2652 records involving 1501 distinct recipient NPIs. Public Medicare Part D data also shows 162 claims for Trulance by this doctor in 2024.
Salix Pharmaceuticals, a division of Bausch Health US, LLC reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported XIFAXAN as an associated drug or biological on 101901 records involving 33018 distinct recipient NPIs. Public Medicare Part D data also shows 137 claims for Xifaxan by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Separate record types
Research & Ownership
Research Payments (direct recipient): not present in the loaded data
Associated Research Funding (for example, named PI): not present in the loaded data
Ownership / Investment: not present in the loaded data
These categories are never added into the General Payments headline. Associated research funding must not be described as money the doctor personally received unless the source record supports that conclusion.
Who paid this doctor?
Companies in 2025 General Payments
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| Gilead Sciences, Inc. | Unresolved — no canonical attribution shown | $6,241.33 | 43.3% | 17 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $4,383.19 | 30.4% | 20 | 2025 |
| Aimmune Therapeutics, Inc. | Unresolved — no canonical attribution shown | $909.07 | 6.3% | 39 | 2025 |
| Ardelyx, Inc. | Unresolved — no canonical attribution shown | $402.96 | 2.8% | 20 | 2025 |
| Stryker Corporation | Unresolved — no canonical attribution shown | $362.21 | 2.5% | 1 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $312.03 | 2.2% | 5 | 2025 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | Unresolved — no canonical attribution shown | $258.43 | 1.8% | 14 | 2025 |
| Madrigal Pharmaceuticals | Unresolved — no canonical attribution shown | $255.38 | 1.8% | 10 | 2025 |
| Phathom Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $163.65 | 1.1% | 8 | 2025 |
| Medtronic, Inc. |
Medtronic, Inc. exact · evidence 2025-07-22 |
$142.84 | 1.0% | 1 | 2025 |
| Novo Nordisk Inc | Unresolved — no canonical attribution shown | $142.35 | 1.0% | 2 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $138.67 | 1.0% | 1 | 2025 |
| Janssen Biotech, Inc. | Unresolved — no canonical attribution shown | $130.77 | 0.9% | 1 | 2025 |
| LEO Pharma Inc. | Unresolved — no canonical attribution shown | $121.62 | 0.8% | 1 | 2025 |
| VIVUS LLC | Unresolved — no canonical attribution shown | $109.48 | 0.8% | 5 | 2025 |
| Celltrion USA Inc. | Unresolved — no canonical attribution shown | $94.88 | 0.7% | 1 | 2025 |
| RedHill Biopharma Inc. | Unresolved — no canonical attribution shown | $93.99 | 0.7% | 1 | 2025 |
| QOL Medical, LLC | Unresolved — no canonical attribution shown | $83.73 | 0.6% | 3 | 2025 |
| Ipsen Biopharmaceuticals, Inc | Unresolved — no canonical attribution shown | $36.68 | 0.2% | 2 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $24.24 | 0.2% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $9,660.00 | 4 |
| Food and Beverage | $4,385.29 | 148 |
| Travel and Lodging | $362.21 | 1 |
A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.
Analysis 1 · Payment-linked products
Products named in Open Payments records
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| CREON Normalized: creon |
Drug | ABBVIE INC. | $4,358.53 | 19 | 2025 |
Source payment records
|
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| Vemlidy Normalized: vemlidy |
Drug | Gilead Sciences, Inc. | $2,955.00 | 2 | 2025 |
Source payment records
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| ZENPEP Normalized: zenpep |
Drug | Aimmune Therapeutics, Inc. | $909.07 | 39 | 2025 |
Source payment records
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| IBSRELA Normalized: ibsrela |
Drug | Ardelyx, Inc. | $402.96 | 20 | 2025 |
Source payment records
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| PANGEA Normalized: pangea |
Device | Stryker Corporation | $362.21 | 1 | 2025 |
Source payment records
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| LINZESS Normalized: linzess |
Drug | ABBVIE INC. | $312.40 | 13 | 2025 |
Source payment records
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| REZDIFFRA Normalized: rezdiffra |
Drug | Madrigal Pharmaceuticals | $255.38 | 10 | 2025 |
Source payment records
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| VOQUEZNA Normalized: voquezna |
Drug | Phathom Pharmaceuticals, Inc. | $163.65 | 8 | 2025 |
Source payment records
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| BARRX Normalized: barrx |
Device | Medtronic, Inc. | $142.84 | 1 | 2025 |
Source payment records
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| Wegovy Normalized: wegovy |
Drug | Novo Nordisk Inc | $142.35 | 2 | 2025 |
Source payment records
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| EVENITY Normalized: evenity |
Biological | Amgen Inc. | $138.67 | 1 | 2025 |
Source payment records
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| TREMFYA Normalized: tremfya |
Drug | Janssen Biotech, Inc. | $130.77 | 1 | 2025 |
Source payment records
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| RELISTOR Normalized: relistor |
Drug | Salix Pharmaceuticals, a division of Bausch Health US, LLC | $125.94 | 7 | 2025 |
Source payment records
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| ADBRY Normalized: adbry |
Biological | LEO Pharma Inc. | $121.62 | 1 | 2025 |
Source payment records
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| ZYMFENTRA Normalized: zymfentra |
Biological | Celltrion USA Inc. | $94.88 | 1 | 2025 |
Source payment records
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| Talicia Normalized: talicia |
Drug | RedHill Biopharma Inc. | $93.99 | 1 | 2025 |
Source payment records
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| PANCREAZE Normalized: pancreaze |
Drug | VIVUS LLC | $85.53 | 4 | 2025 |
Source payment records
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| Sucraid Normalized: sucraid |
Drug | QOL Medical, LLC | $83.73 | 3 | 2025 |
Source payment records
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| OMVOH Normalized: omvoh |
Drug | Lilly USA, LLC | $68.58 | 3 | 2025 |
Source payment records
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| XIFAXAN Normalized: xifaxan |
Drug | Salix Pharmaceuticals, a division of Bausch Health US, LLC | $66.92 | 3 | 2025 |
Source payment records
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| TRULANCE Normalized: trulance |
Drug | Salix Pharmaceuticals, a division of Bausch Health US, LLC | $65.57 | 4 | 2025 |
Source payment records
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| IQIRVO Normalized: iqirvo |
Drug | Ipsen Biopharmaceuticals, Inc | $36.68 | 2 | 2025 |
Source payment records
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| VELSIPITY Normalized: velsipity |
Drug | PFIZER INC. | $24.24 | 1 | 2025 |
Source payment records
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| QSYMIA Normalized: qsymia |
Drug | VIVUS LLC | $23.95 | 1 | 2025 |
Source payment records
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* Product-associated amounts are non-additive because one payment record may name more than one product.
These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.
Public prescribing for products named in payments
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| CREON creon |
2025 | Creon | 2024 | 1112 | exact normalized | Medicare Part D |
| IBSRELA ibsrela |
2025 | Ibsrela | 2024 | 44 | exact normalized | Medicare Part D |
| LINZESS linzess |
2025 | Linzess | 2024 | 873 | exact normalized | Medicare Part D |
| REZDIFFRA rezdiffra |
2025 | Rezdiffra | 2024 | 23 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| TRULANCE trulance |
2025 | Trulance | 2024 | 162 | exact normalized | Medicare Part D |
| Vemlidy vemlidy |
2025 | Vemlidy | 2024 | 841 | exact normalized | Medicare Part D |
| VOQUEZNA voquezna |
2025 | Voquezna | 2024 | 212 | exact normalized | Medicare Part D |
| XIFAXAN xifaxan |
2025 | Xifaxan | 2024 | 137 | exact normalized | Medicare Part D |
| ZENPEP zenpep |
2025 | Zenpep | 2024 | 820 | exact normalized | Medicare Part D |
The presence of the same drug in both datasets does not show that a payment caused or influenced a prescription.
Analysis 2 · Same-company prescribing overlap
Drugs reported in other payments from the same company that also appear in Medicare Part D
This analysis is independent from products named on this doctor’s individual payment records. A row appears only when the exact Open Payments reporting entity paid this doctor, that same reporting entity reported the drug or biological on at least 10 loaded General Payment records involving at least 2 distinct recipient NPIs, and this doctor has the same non-generic brand in public Part D data. This does not mean the company owns or manufactures the drug.
| Paying company | Payment year | Drug reported by same entity | Open Payments evidence | Part D | Claims | Beneficiaries |
|---|---|---|---|---|---|---|
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | CREON open payments reported associated product |
CMS Open Payments — General Payments 91561 supporting records · 20616 recipient NPIs · example record 1201352608 |
Creon · 2024 Exact normalized brand match · 1 Part D row |
1112 | 221 |
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | LINZESS open payments reported associated product |
CMS Open Payments — General Payments 87954 supporting records · 21815 recipient NPIs · example record 1201352608 |
Linzess · 2024 Exact normalized brand match · 1 Part D row |
873 | 176 |
| Aimmune Therapeutics, Inc. Exact reporting entity; no affiliate inference |
2025 | ZENPEP open payments reported associated product |
CMS Open Payments — General Payments 32144 supporting records · 12432 recipient NPIs · example record 1249641927 |
Zenpep · 2024 Exact normalized brand match · 1 Part D row |
820 | 160 |
| Ardelyx, Inc. Exact reporting entity; no affiliate inference |
2025 | IBSRELA open payments reported associated product |
CMS Open Payments — General Payments 59980 supporting records · 18215 recipient NPIs · example record 1247828901 |
Ibsrela · 2024 Exact normalized brand match · 1 Part D row |
44 | 15 |
| Gilead Sciences, Inc. Exact reporting entity; no affiliate inference |
2025 | Vemlidy open payments reported associated product |
CMS Open Payments — General Payments 782 supporting records · 554 recipient NPIs · example record 1234350906 |
Vemlidy · 2024 Exact normalized brand match · 1 Part D row |
841 | 98 |
| Madrigal Pharmaceuticals Exact reporting entity; no affiliate inference |
2025 | REZDIFFRA open payments reported associated product |
CMS Open Payments — General Payments 75650 supporting records · 19195 recipient NPIs · example record 1248227746 |
Rezdiffra · 2024 Exact normalized brand match · 1 Part D row |
23 | suppressed by CMS |
| Phathom Pharmaceuticals, Inc. Exact reporting entity; no affiliate inference |
2025 | VOQUEZNA open payments reported associated product |
CMS Open Payments — General Payments 90302 supporting records · 33442 recipient NPIs · example record 1219216983 |
Voquezna · 2024 Exact normalized brand match · 1 Part D row |
212 | 67 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC Exact reporting entity; no affiliate inference |
2025 | TRULANCE open payments reported associated product |
CMS Open Payments — General Payments 2652 supporting records · 1501 recipient NPIs · example record 1231775445 |
Trulance · 2024 Exact normalized brand match · 1 Part D row |
162 | 47 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC Exact reporting entity; no affiliate inference |
2025 | XIFAXAN open payments reported associated product |
CMS Open Payments — General Payments 101901 supporting records · 33018 recipient NPIs · example record 1231775337 |
Xifaxan · 2024 Exact normalized brand match · 1 Part D row |
137 | 27 |
These facts do not show that a payment was for the drug, that the company owns or manufactures the drug, or that a payment caused or influenced prescribing.
Public Medicare Part D data
Provider-and-drug rows loaded for 2024
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Famotidine | Famotidine | 2371 | 621 |
| Creon | Lipase/Protease/Amylase | 1112 | 221 |
| Dexlansoprazole Dr | Dexlansoprazole | 1096 | 200 |
| Pantoprazole Sodium | Pantoprazole Sodium | 885 | 269 |
| Linzess | Linaclotide | 873 | 176 |
| Vemlidy | Tenofovir Alafenamide | 841 | 98 |
| Zenpep | Lipase/Protease/Amylase | 820 | 160 |
| Entecavir | Entecavir | 584 | 96 |
| Baclofen | Baclofen | 412 | 147 |
| Omeprazole | Omeprazole | 403 | 113 |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 273 | 268 |
| Sucralfate | Sucralfate | 235 | 75 |
| Voquezna | Vonoprazan Fumarate | 212 | 67 |
| Trulance | Plecanatide | 162 | 47 |
| Xifaxan | Rifaximin | 137 | 27 |
| Lactulose | Lactulose | 126 | 42 |
| Amitriptyline Hcl | Amitriptyline Hcl | 99 | 36 |
| Procto-Med Hc | Hydrocortisone | 95 | 33 |
| Vascepa | Icosapent Ethyl | 91 | 17 |
| Hydrocortisone | Hydrocortisone | 85 | 31 |
| Atorvastatin Calcium | Atorvastatin Calcium | 76 | 17 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 74 | 25 |
| Gavilyte-G | Peg3350/Sod Sulf,bicarb,cl/Kcl | 67 | 67 |
| Proctozone-Hc | Hydrocortisone | 56 | 21 |
| Cyproheptadine Hcl | Cyproheptadine Hcl | 45 | 24 |
| Ibsrela | Tenapanor Hcl | 44 | 15 |
| Dicyclomine Hcl | Dicyclomine Hcl | 41 | 27 |
| Tenofovir Disoproxil Fumarate | Tenofovir Disoproxil Fumarate | 39 | suppressed |
| Cholestyramine | Cholestyramine (With Sugar) | 38 | 12 |
| Megestrol Acetate | Megestrol Acetate | 37 | 22 |
| Nadolol | Nadolol | 36 | suppressed |
| Metronidazole | Metronidazole | 34 | 32 |
| Icosapent Ethyl | Icosapent Ethyl | 31 | 13 |
| Furosemide | Furosemide | 30 | suppressed |
| Ursodiol | Ursodiol | 30 | suppressed |
| Dexilant | Dexlansoprazole | 27 | suppressed |
| Lubiprostone | Lubiprostone | 26 | suppressed |
| Loperamide | Loperamide Hcl | 25 | 15 |
| Spironolactone | Spironolactone | 25 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 24 | 16 |
| Rezdiffra | Resmetirom | 23 | suppressed |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 23 | 11 |
| Gemfibrozil | Gemfibrozil | 22 | suppressed |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 21 | 21 |
| Constulose | Lactulose | 20 | suppressed |
| Celecoxib | Celecoxib | 17 | 11 |
| Gavilyte-C | Peg3350/Sod Sulf,bicarb,cl/Kcl | 17 | 17 |
| Azathioprine | Azathioprine | 16 | suppressed |
| Suprep | Sodium, Potassium,mag Sulfates | 15 | 15 |
| Metoclopramide Hcl | Metoclopramide Hcl | 14 | suppressed |
| Amoxicillin | Amoxicillin | 12 | 11 |
| Cholestyramine Light | Cholestyramine | 12 | suppressed |
| Ezetimibe | Ezetimibe | 12 | suppressed |
| Lansoprazole | Lansoprazole | 12 | suppressed |
| Motegrity | Prucalopride Succinate | 12 | suppressed |
| Peg-3350 And Electrolytes | Peg3350/Sod Sulf,bicarb,cl/Kcl | 12 | 12 |
| Peg3350-Sod Sul-Nacl-Kcl-Asb-C | Peg3350/Sod Sul/Nacl/Kcl/Asb/C | 12 | 12 |
| Viread | Tenofovir Disoproxil Fumarate | 12 | suppressed |
| Enulose | Lactulose | 11 | suppressed |
| Sildenafil Citrate | Sildenafil Citrate | 11 | suppressed |
Timeline
Payment and prescribing data by year
Open Payments and Medicare Part D may refer to different years. They are shown separately rather than aligned as if they describe the same period.
| Year | General Payments | Main payer | Explicit products | Company overlaps | Part D coverage |
|---|---|---|---|---|---|
| 2025 | $14,407.50 · 153 records | Gilead Sciences, Inc. | ADBRY, BARRX, CREON, EVENITY, IBSRELA, IQIRVO, LINZESS, OMVOH, PANCREAZE, PANGEA, QSYMIA, RELISTOR, REZDIFFRA, Sucraid, TREMFYA, TRULANCE, Talicia, VELSIPITY, VOQUEZNA, Vemlidy, Wegovy, XIFAXAN, ZENPEP, ZYMFENTRA | 9 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Creon play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with ABBVIE INC.?
- Are there reasonable alternatives I should understand when we discuss treatment options?
- How should I interpret the industry-payment records shown here in the context of my care?
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
How to read this page
- Payment and Medicare prescribing data can cover different years; every comparison shows both years explicitly.
- Part D does not represent a doctor’s entire practice; it excludes many patients and is subject to CMS public-release thresholds.
- Company–drug relationships must have an auditable source, a precise relationship type, and a valid evidence period. Unresolved mappings are not published.
- Generic drug claims are not attributed to a specific manufacturer without manufacturer-level evidence.
- When a source extract is incomplete, missing rows are never treated as proof of no payments or no prescriptions.
Loaded source releases
| Dataset | Year | Publication | Source |
|---|---|---|---|
| CMS Open Payments — General Payments | 2025 | 2026-06-30 | Original source |
| Medicare Part D Prescribers by Provider and Drug | 2024 | 2026-05-06 | Original source |
| NPPES Data Dissemination V2 | current / reference data | 2026-08-10 | Original source |
Full methodology · Questions & answers · Report a possible error