Payment overview · 2025
General Payments
$830.68
24 reported records · 7 companies
Healthcare provider profile · identity verified
David T Chen, MD
Allopathic & Osteopathic Physicians|Family Medicine · POMONA, CA · NPI 1891719852
Verified facts
What the public records show
CMS Open Payments records show David T Chen, MD received $830.68 in general payments during 2025 across 24 reported records.
Amgen Inc. accounted for 41.9% 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: Farxiga, Prolia, Shingrix.
Amgen 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 PROLIA as an associated drug or biological on 20867 records involving 11744 distinct recipient NPIs. Public Medicare Part D data also shows 30 claims for Prolia by this doctor in 2024.
AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Farxiga by this doctor in 2024.
GlaxoSmithKline, 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 SHINGRIX as an associated drug or biological on 43515 records involving 26794 distinct recipient NPIs. Public Medicare Part D data also shows 42 claims for Shingrix by this doctor in 2024.
PFIZER 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 ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Eliquis 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 |
|---|---|---|---|---|---|
| Amgen Inc. | Unresolved — no canonical attribution shown | $347.72 | 41.9% | 15 | 2025 |
| Stryker Corporation | Unresolved — no canonical attribution shown | $155.56 | 18.7% | 1 | 2025 |
| GlaxoSmithKline, LLC. | Unresolved — no canonical attribution shown | $154.32 | 18.6% | 2 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $60.32 | 7.3% | 2 | 2025 |
| Kowa Pharmaceuticals America, Inc. | Unresolved — no canonical attribution shown | $54.16 | 6.5% | 2 | 2025 |
| Agios Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $34.31 | 4.1% | 1 | 2025 |
| AstraZeneca Pharmaceuticals LP | Unresolved — no canonical attribution shown | $24.29 | 2.9% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $830.68 | 24 |
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 |
|---|---|---|---|---|---|
| EVENITY Normalized: evenity |
Biological | Amgen Inc. | $207.13 | 5 | 2025 |
Source payment records
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| STRYKER Normalized: stryker |
Device | Stryker Corporation | $155.56 | 1 | 2025 |
Source payment records
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| AREXVY Normalized: arexvy |
Biological | GlaxoSmithKline, LLC. | $154.32 | 2 | 2025 |
Source payment records
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| REPATHA Normalized: repatha |
Biological | Amgen Inc. | $140.59 | 10 | 2025 |
Source payment records
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| OTEZLA Normalized: otezla |
Drug | Amgen Inc. | $112.59 | 8 | 2025 |
Source payment records
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| ABRYSVO Normalized: abrysvo |
Biological | PFIZER INC. | $60.32 | 2 | 2025 |
Source payment records
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| COMIRNATY Normalized: comirnaty |
Biological | PFIZER INC. | $60.32 | 2 | 2025 |
Source payment records
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| PREVNAR 20 Normalized: prevnar 20 |
Biological | PFIZER INC. | $60.32 | 2 | 2025 |
Source payment records
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| PROLIA Normalized: prolia |
Biological | Amgen Inc. | $57.34 | 4 | 2025 |
Source payment records
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| ZORYVE Normalized: zoryve |
Drug | Kowa Pharmaceuticals America, Inc. | $54.16 | 2 | 2025 |
Source payment records
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| PYRUKYND Normalized: pyrukynd |
Drug | Agios Pharmaceuticals, Inc. | $34.31 | 1 | 2025 |
Source payment records
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| SHINGRIX Normalized: shingrix |
Biological | GlaxoSmithKline, LLC. | $30.29 | 1 | 2025 |
Source payment records
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| FARXIGA Normalized: farxiga |
Drug | AstraZeneca Pharmaceuticals LP | $24.29 | 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 |
|---|---|---|---|---|---|---|
| FARXIGA farxiga |
2025 | Farxiga | 2024 | 21 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| PROLIA prolia |
2025 | Prolia | 2024 | 30 | exact normalized | Medicare Part D |
| SHINGRIX shingrix |
2025 | Shingrix | 2024 | 42 | 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 |
|---|---|---|---|---|---|---|
| Amgen Inc. Exact reporting entity; no affiliate inference |
2025 | PROLIA open payments reported associated product |
CMS Open Payments — General Payments 20867 supporting records · 11744 recipient NPIs · example record 1226874448 |
Prolia · 2024 Exact normalized brand match · 1 Part D row |
30 | 21 |
| AstraZeneca Pharmaceuticals LP Exact reporting entity; no affiliate inference |
2025 | FARXIGA open payments reported associated product |
CMS Open Payments — General Payments 106133 supporting records · 42906 recipient NPIs · example record 1206131362 |
Farxiga · 2024 Exact normalized brand match · 1 Part D row |
21 | suppressed by CMS |
| GlaxoSmithKline, LLC. Exact reporting entity; no affiliate inference |
2025 | SHINGRIX open payments reported associated product |
CMS Open Payments — General Payments 43515 supporting records · 26794 recipient NPIs · example record 1190332452 |
Shingrix · 2024 Exact normalized brand match · 1 Part D row |
42 | 27 |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | ELIQUIS open payments reported associated product |
CMS Open Payments — General Payments 87112 supporting records · 36032 recipient NPIs · example record 1228794063 |
Eliquis · 2024 Exact normalized brand match · 1 Part D row |
24 | 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 |
|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 395 | 104 |
| Amlodipine Besylate | Amlodipine Besylate | 347 | 91 |
| Losartan Potassium | Losartan Potassium | 316 | 81 |
| Metformin Hcl | Metformin Hcl | 220 | 59 |
| Hydrochlorothiazide | Hydrochlorothiazide | 129 | 35 |
| Simvastatin | Simvastatin | 112 | 29 |
| Lisinopril | Lisinopril | 88 | 29 |
| Metoprolol Succinate | Metoprolol Succinate | 85 | 24 |
| Alendronate Sodium | Alendronate Sodium | 81 | 27 |
| Levothyroxine Sodium | Levothyroxine Sodium | 64 | 14 |
| Famotidine | Famotidine | 63 | 21 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 51 | 20 |
| Tamsulosin Hcl | Tamsulosin Hcl | 50 | 16 |
| Shingrix | Varicella-Zoster Ge/As01b/Pf | 42 | 27 |
| Zolpidem Tartrate | Zolpidem Tartrate | 42 | suppressed |
| Ezetimibe | Ezetimibe | 41 | 15 |
| Metoprolol Tartrate | Metoprolol Tartrate | 40 | 13 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 34 | 14 |
| Allopurinol | Allopurinol | 33 | suppressed |
| Glipizide | Glipizide | 30 | suppressed |
| Prolia | Denosumab | 30 | 21 |
| Valsartan | Valsartan | 30 | suppressed |
| Clopidogrel | Clopidogrel Bisulfate | 27 | suppressed |
| Finasteride | Finasteride | 25 | suppressed |
| Eliquis | Apixaban | 24 | suppressed |
| Omega-3 Acid Ethyl Esters | Omega-3 Acid Ethyl Esters | 24 | suppressed |
| Atenolol | Atenolol | 22 | suppressed |
| Januvia | Sitagliptin Phosphate | 22 | suppressed |
| Jardiance | Empagliflozin | 22 | suppressed |
| Benazepril Hcl | Benazepril Hcl | 21 | suppressed |
| Farxiga | Dapagliflozin Propanediol | 21 | suppressed |
| Omeprazole | Omeprazole | 19 | suppressed |
| Azelastine Hcl | Azelastine Hcl | 18 | suppressed |
| Candesartan Cilexetil | Candesartan Cilexetil | 18 | suppressed |
| Vascepa | Icosapent Ethyl | 18 | suppressed |
| Icosapent Ethyl | Icosapent Ethyl | 17 | suppressed |
| Pantoprazole Sodium | Pantoprazole Sodium | 16 | suppressed |
| Pioglitazone Hcl | Pioglitazone Hcl | 16 | suppressed |
| Gemfibrozil | Gemfibrozil | 15 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 14 | suppressed |
| Furosemide | Furosemide | 14 | suppressed |
| Glipizide Er | Glipizide | 14 | suppressed |
| Naproxen | Naproxen | 14 | suppressed |
| Gabapentin | Gabapentin | 13 | suppressed |
| Ketoconazole | Ketoconazole | 13 | suppressed |
| Pravastatin Sodium | Pravastatin Sodium | 13 | suppressed |
| Fenofibrate | Fenofibrate | 12 | suppressed |
| Metformin Hcl Er | Metformin Hcl | 12 | suppressed |
| Carvedilol | Carvedilol | 11 | suppressed |
| Clotrimazole | Clotrimazole | 11 | suppressed |
| Olmesartan Medoxomil | Olmesartan Medoxomil | 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 | $830.68 · 24 records | Amgen Inc. | ABRYSVO, AREXVY, COMIRNATY, EVENITY, FARXIGA, OTEZLA, PREVNAR 20, PROLIA, PYRUKYND, REPATHA, SHINGRIX, STRYKER, ZORYVE | 4 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Farxiga play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with Amgen 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