Payment overview · 2025
General Payments
$734.91
46 reported records · 10 companies
Healthcare provider profile · identity verified
William Frederick Ergen, M.D.
Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology · KNOXVILLE, TN · NPI 1710249529
Verified facts
What the public records show
CMS Open Payments records show William Frederick Ergen, M.D. received $734.91 in general payments during 2025 across 46 reported records.
ABBVIE INC. accounted for 49.7% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 13 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Entyvio, Linzess.
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 80 claims for Linzess 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 VIBERZI as an associated drug or biological on 11354 records involving 5020 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Viberzi by this doctor in 2024.
Janssen Biotech, 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 STELARA as an associated drug or biological on 23706 records involving 7279 distinct recipient NPIs. Public Medicare Part D data also shows 100 claims for Stelara by this doctor in 2024.
Takeda Pharmaceuticals U.S.A., 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 ENTYVIO as an associated drug or biological on 61580 records involving 14953 distinct recipient NPIs. Public Medicare Part D data also shows 31 claims for Entyvio 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 |
|---|---|---|---|---|---|
| ABBVIE INC. | Unresolved — no canonical attribution shown | $365.37 | 49.7% | 29 | 2025 |
| Celltrion USA Inc. | Unresolved — no canonical attribution shown | $81.95 | 11.2% | 4 | 2025 |
| Ardelyx, Inc. | Unresolved — no canonical attribution shown | $80.14 | 10.9% | 3 | 2025 |
| Ferring Pharmaceuticals Inc. | Unresolved — no canonical attribution shown | $67.97 | 9.2% | 3 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $32.06 | 4.4% | 2 | 2025 |
| Janssen Biotech, Inc. | Unresolved — no canonical attribution shown | $30.04 | 4.1% | 1 | 2025 |
| Madrigal Pharmaceuticals | Unresolved — no canonical attribution shown | $26.89 | 3.7% | 1 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $17.87 | 2.4% | 1 | 2025 |
| Takeda Pharmaceuticals U.S.A., Inc. | Unresolved — no canonical attribution shown | $16.49 | 2.2% | 1 | 2025 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | Unresolved — no canonical attribution shown | $16.13 | 2.2% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $734.91 | 46 |
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 |
|---|---|---|---|---|---|
| SKYRIZI Normalized: skyrizi |
Biological | ABBVIE INC. | $290.09 | 21 | 2025 |
Source payment records
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| RINVOQ Normalized: rinvoq |
Biological | ABBVIE INC. | $272.87 | 19 | 2025 |
Source payment records
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| VEGZELMA Normalized: vegzelma |
Biological | Celltrion USA Inc. | $81.95 | 4 | 2025 |
Source payment records
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| IBSRELA Normalized: ibsrela |
Drug | Ardelyx, Inc. | $80.14 | 3 | 2025 |
Source payment records
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| CREON Normalized: creon |
Drug | ABBVIE INC. | $75.28 | 8 | 2025 |
Source payment records
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| LINZESS Normalized: linzess |
Drug | ABBVIE INC. | $75.28 | 8 | 2025 |
Source payment records
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| REBYOTA Normalized: rebyota |
Biological | Ferring Pharmaceuticals Inc. | $67.97 | 3 | 2025 |
Source payment records
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| XELJANZ Normalized: xeljanz |
Drug | PFIZER INC. | $32.06 | 2 | 2025 |
Source payment records
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| TREMFYA Normalized: tremfya |
Drug | Janssen Biotech, Inc. | $30.04 | 1 | 2025 |
Source payment records
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| REZDIFFRA Normalized: rezdiffra |
Drug | Madrigal Pharmaceuticals | $26.89 | 1 | 2025 |
Source payment records
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| OMVOH Normalized: omvoh |
Drug | Lilly USA, LLC | $17.87 | 1 | 2025 |
Source payment records
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| ENTYVIO Normalized: entyvio |
Biological | Takeda Pharmaceuticals U.S.A., Inc. | $16.49 | 1 | 2025 |
Source payment records
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| XIFAXAN Normalized: xifaxan |
Drug | Salix Pharmaceuticals, a division of Bausch Health US, LLC | $16.13 | 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 |
|---|---|---|---|---|---|---|
| ENTYVIO entyvio |
2025 | Entyvio | 2024 | 31 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| LINZESS linzess |
2025 | Linzess | 2024 | 80 | 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 | 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 |
80 | 27 |
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | VIBERZI open payments reported associated product |
CMS Open Payments — General Payments 11354 supporting records · 5020 recipient NPIs · example record 1201352948 |
Viberzi · 2024 Exact normalized brand match · 1 Part D row |
12 | suppressed by CMS |
| Janssen Biotech, Inc. Exact reporting entity; no affiliate inference |
2025 | STELARA open payments reported associated product |
CMS Open Payments — General Payments 23706 supporting records · 7279 recipient NPIs · example record 1174257377 |
Stelara · 2024 Exact normalized brand match · 1 Part D row |
100 | 14 |
| Takeda Pharmaceuticals U.S.A., Inc. Exact reporting entity; no affiliate inference |
2025 | ENTYVIO open payments reported associated product |
CMS Open Payments — General Payments 61580 supporting records · 14953 recipient NPIs · example record 1223616258 |
Entyvio · 2024 Exact normalized brand match · 1 Part D row |
31 | suppressed by CMS |
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 |
|---|---|---|---|
| Omeprazole | Omeprazole | 232 | 84 |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 168 | 167 |
| Famotidine | Famotidine | 130 | 48 |
| Pantoprazole Sodium | Pantoprazole Sodium | 128 | 46 |
| Stelara | Ustekinumab | 100 | 14 |
| Linzess | Linaclotide | 80 | 27 |
| Gavilyte-G | Peg3350/Sod Sulf,bicarb,cl/Kcl | 43 | 41 |
| Dexlansoprazole Dr | Dexlansoprazole | 41 | suppressed |
| Sucralfate | Sucralfate | 40 | 14 |
| Azathioprine | Azathioprine | 36 | suppressed |
| Mesalamine Er | Mesalamine | 32 | suppressed |
| Entyvio | Vedolizumab | 31 | suppressed |
| Dicyclomine Hcl | Dicyclomine Hcl | 30 | 14 |
| Metronidazole | Metronidazole | 29 | 23 |
| Sulfasalazine | Sulfasalazine | 26 | suppressed |
| Balsalazide Disodium | Balsalazide Disodium | 24 | suppressed |
| Skyrizi On-Body | Risankizumab-Rzaa | 21 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 20 | suppressed |
| Cholestyramine | Cholestyramine (With Sugar) | 20 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 18 | suppressed |
| Colestipol Hcl | Colestipol Hcl | 17 | suppressed |
| Suflave | Peg 3350/Sod Sulf,chlr/Pot/Mag | 16 | 16 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 14 | suppressed |
| Peg-3350 And Electrolytes | Peg3350/Sod Sulf,bicarb,cl/Kcl | 14 | 14 |
| Budesonide Dr | Budesonide | 13 | suppressed |
| Nadolol | Nadolol | 12 | suppressed |
| Viberzi | Eluxadoline | 12 | suppressed |
| Cholestyramine Light | Cholestyramine | 11 | suppressed |
| Sutab | Sod Sulf/Pot Chloride/Mag Sulf | 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 | $734.91 · 46 records | ABBVIE INC. | CREON, ENTYVIO, IBSRELA, LINZESS, OMVOH, REBYOTA, REZDIFFRA, RINVOQ, SKYRIZI, TREMFYA, VEGZELMA, XELJANZ, XIFAXAN | 4 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Entyvio 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