Payment overview · 2025
General Payments
$1,173.69
21 reported records · 9 companies
Healthcare provider profile · identity verified
De Tan
Allopathic & Osteopathic Physicians|Internal Medicine|Gastroenterology · SACRAMENTO, CA · NPI 1851384044
Verified facts
What the public records show
CMS Open Payments records show De Tan received $1,173.69 in general payments during 2025 across 21 reported records.
Janssen Scientific Affairs, LLC accounted for 27.9% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 10 associated products.
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 105 claims for Linzess 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 |
|---|---|---|---|---|---|
| Janssen Scientific Affairs, LLC | Unresolved — no canonical attribution shown | $327.15 | 27.9% | 3 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $231.64 | 19.7% | 2 | 2025 |
| Madrigal Pharmaceuticals | Unresolved — no canonical attribution shown | $138.89 | 11.8% | 2 | 2025 |
| Takeda Pharmaceuticals U.S.A., Inc. | Unresolved — no canonical attribution shown | $122.64 | 10.4% | 5 | 2025 |
| Celltrion USA Inc. | Unresolved — no canonical attribution shown | $122.31 | 10.4% | 2 | 2025 |
| GENZYME CORPORATION | Unresolved — no canonical attribution shown | $106.77 | 9.1% | 1 | 2025 |
| Ardelyx, Inc. | Unresolved — no canonical attribution shown | $89.62 | 7.6% | 4 | 2025 |
| Regeneron Healthcare Solutions, Inc. | Unresolved — no canonical attribution shown | $18.21 | 1.6% | 1 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $16.46 | 1.4% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $1,173.69 | 21 |
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 |
|---|---|---|---|---|---|
| REZDIFFRA Normalized: rezdiffra |
Drug | Madrigal Pharmaceuticals | $138.89 | 2 | 2025 |
Source payment records
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| DUPIXENT Normalized: dupixent |
Biological | GENZYME CORPORATION, Regeneron Healthcare Solutions, Inc. | $124.98 | 2 | 2025 |
Source payment records
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| ENTYVIO Normalized: entyvio |
Biological | Takeda Pharmaceuticals U.S.A., Inc. | $122.64 | 5 | 2025 |
Source payment records
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| ZYMFENTRA Normalized: zymfentra |
Biological | Celltrion USA Inc. | $122.31 | 2 | 2025 |
Source payment records
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| MAVYRET Normalized: mavyret |
Drug | ABBVIE INC. | $117.07 | 1 | 2025 |
Source payment records
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| RINVOQ Normalized: rinvoq |
Biological | ABBVIE INC. | $117.07 | 1 | 2025 |
Source payment records
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| SKYRIZI Normalized: skyrizi |
Biological | ABBVIE INC. | $114.57 | 1 | 2025 |
Source payment records
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| IBSRELA Normalized: ibsrela |
Drug | Ardelyx, Inc. | $89.62 | 4 | 2025 |
Source payment records
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| VELSIPITY Normalized: velsipity |
Drug | PFIZER INC. | $16.46 | 1 | 2025 |
Source payment records
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| XELJANZ Normalized: xeljanz |
Drug | PFIZER INC. | $16.46 | 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
No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.
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 |
105 | 35 |
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 |
|---|---|---|---|
| Pantoprazole Sodium | Pantoprazole Sodium | 286 | 73 |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 265 | 256 |
| Famotidine | Famotidine | 178 | 52 |
| Dexlansoprazole Dr | Dexlansoprazole | 145 | 38 |
| Omeprazole | Omeprazole | 136 | 45 |
| Linzess | Linaclotide | 105 | 35 |
| Dicyclomine Hcl | Dicyclomine Hcl | 74 | 24 |
| Metoclopramide Hcl | Metoclopramide Hcl | 47 | 27 |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 44 | 15 |
| Rabeprazole Sodium | Rabeprazole Sodium | 37 | 11 |
| Trulance | Plecanatide | 34 | suppressed |
| Lubiprostone | Lubiprostone | 33 | suppressed |
| Budesonide Ec | Budesonide | 27 | suppressed |
| Cholestyramine | Cholestyramine (With Sugar) | 24 | 12 |
| Sucralfate | Sucralfate | 24 | 11 |
| Vemlidy | Tenofovir Alafenamide | 24 | suppressed |
| Entecavir | Entecavir | 23 | suppressed |
| Xifaxan | Rifaximin | 23 | 12 |
| Peg 3350-Electrolyte | Sodium Chloride/Nahco3/Kcl/Peg | 21 | 21 |
| Procto-Med Hc | Hydrocortisone | 21 | suppressed |
| Ursodiol | Ursodiol | 21 | suppressed |
| Diphenoxylate-Atropine | Diphenoxylate Hcl/Atropine | 16 | suppressed |
| Firvanq | Vancomycin Hcl | 16 | suppressed |
| Mesalamine | Mesalamine | 16 | suppressed |
| Dexilant | Dexlansoprazole | 14 | suppressed |
| Humira(Cf) Pen | Adalimumab | 14 | suppressed |
| Furosemide | Furosemide | 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 | $1,173.69 · 21 records | Janssen Scientific Affairs, LLC | DUPIXENT, ENTYVIO, IBSRELA, MAVYRET, REZDIFFRA, RINVOQ, SKYRIZI, VELSIPITY, XELJANZ, ZYMFENTRA | 1 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- 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