Payment overview · 2025
General Payments
$725.31
32 reported records · 14 companies
Healthcare provider profile · identity verified
Tong Sun, MD
Allopathic & Osteopathic Physicians|Internal Medicine|Nephrology · MODESTO, CA · NPI 1629161336
Verified facts
What the public records show
CMS Open Payments records show Tong Sun, MD received $725.31 in general payments during 2025 across 32 reported records.
Bayer Healthcare Pharmaceuticals Inc. accounted for 13.2% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 16 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Jardiance, Kerendia.
Bayer Healthcare 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 Kerendia as an associated drug or biological on 138674 records involving 48458 distinct recipient NPIs. Public Medicare Part D data also shows 42 claims for Kerendia by this doctor in 2024.
Boehringer Ingelheim 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 JARDIANCE as an associated drug or biological on 123636 records involving 49438 distinct recipient NPIs. Public Medicare Part D data also shows 65 claims for Jardiance 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 |
|---|---|---|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | Unresolved — no canonical attribution shown | $96.12 | 13.2% | 4 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $90.20 | 12.4% | 5 | 2025 |
| Otsuka America Pharmaceutical, Inc. | Unresolved — no canonical attribution shown | $88.73 | 12.2% | 3 | 2025 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $86.73 | 12.0% | 4 | 2025 |
| Calliditas Therapeutics US Inc. | Unresolved — no canonical attribution shown | $80.87 | 11.2% | 3 | 2025 |
| Fresenius USA Marketing, Inc. | Unresolved — no canonical attribution shown | $59.04 | 8.1% | 3 | 2025 |
| AKEBIA THERAPEUTICS INC | Unresolved — no canonical attribution shown | $53.22 | 7.3% | 2 | 2025 |
| KYOWA KIRIN, INC. | Unresolved — no canonical attribution shown | $47.98 | 6.6% | 2 | 2025 |
| Ascendis Pharma Endocrinology Inc | Unresolved — no canonical attribution shown | $27.96 | 3.9% | 1 | 2025 |
| SCPHARMACEUTICALS INC. | Unresolved — no canonical attribution shown | $24.37 | 3.4% | 1 | 2025 |
| Vifor Pharma, Inc. | Unresolved — no canonical attribution shown | $22.64 | 3.1% | 1 | 2025 |
| Aurinia Pharma U.S., Inc. | Unresolved — no canonical attribution shown | $17.45 | 2.4% | 1 | 2025 |
| Novartis Pharmaceuticals Corporation | Unresolved — no canonical attribution shown | $15.15 | 2.1% | 1 | 2025 |
| Ardelyx, Inc. | Unresolved — no canonical attribution shown | $14.85 | 2.0% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $725.31 | 32 |
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 |
|---|---|---|---|---|---|
| Kerendia Normalized: kerendia |
Drug | Bayer Healthcare Pharmaceuticals Inc. | $96.12 | 4 | 2025 |
Source payment records
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| JARDIANCE Normalized: jardiance |
Drug | Boehringer Ingelheim Pharmaceuticals, Inc. | $86.73 | 4 | 2025 |
Source payment records
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| TARPEYO Normalized: tarpeyo |
Drug | Calliditas Therapeutics US Inc. | $80.87 | 3 | 2025 |
Source payment records
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| VELPHORO Normalized: velphoro |
Drug | Fresenius USA Marketing, Inc. | $59.04 | 3 | 2025 |
Source payment records
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| JYNARQUE Normalized: jynarque |
Drug | Otsuka America Pharmaceutical, Inc. | $55.97 | 2 | 2025 |
Source payment records
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| Vafseo Normalized: vafseo |
Drug | AKEBIA THERAPEUTICS INC | $53.22 | 2 | 2025 |
Source payment records
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| TAVNEOS Normalized: tavneos |
Drug | Amgen Inc. | $49.03 | 3 | 2025 |
Source payment records
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| CRYSVITA Normalized: crysvita |
Drug | KYOWA KIRIN, INC. | $47.98 | 2 | 2025 |
Source payment records
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| KRYSTEXXA Normalized: krystexxa |
Biological | Amgen Inc. | $41.17 | 2 | 2025 |
Source payment records
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| VOYXACT Normalized: voyxact |
Drug | Otsuka America Pharmaceutical, Inc. | $32.76 | 1 | 2025 |
Source payment records
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| Yorvipath Normalized: yorvipath |
Drug | Ascendis Pharma Endocrinology Inc | $27.96 | 1 | 2025 |
Source payment records
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| FUROSCIX Normalized: furoscix |
Drug | SCPHARMACEUTICALS INC. | $24.37 | 1 | 2025 |
Source payment records
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| Veltassa Normalized: veltassa |
Drug | Vifor Pharma, Inc. | $22.64 | 1 | 2025 |
Source payment records
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| LUPKYNIS Normalized: lupkynis |
Drug | Aurinia Pharma U.S., Inc. | $17.45 | 1 | 2025 |
Source payment records
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| Fabhalta Normalized: fabhalta |
Drug | Novartis Pharmaceuticals Corporation | $15.15 | 1 | 2025 |
Source payment records
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| IBSRELA Normalized: ibsrela |
Drug | Ardelyx, Inc. | $14.85 | 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 |
|---|---|---|---|---|---|---|
| JARDIANCE jardiance |
2025 | Jardiance | 2024 | 65 | exact normalized | Medicare Part D |
| Kerendia kerendia |
2025 | Kerendia | 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 |
|---|---|---|---|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. Exact reporting entity; no affiliate inference |
2025 | Kerendia open payments reported associated product |
CMS Open Payments — General Payments 138674 supporting records · 48458 recipient NPIs · example record 1225434663 |
Kerendia · 2024 Exact normalized brand match · 1 Part D row |
42 | 11 |
| Boehringer Ingelheim Pharmaceuticals, Inc. Exact reporting entity; no affiliate inference |
2025 | JARDIANCE open payments reported associated product |
CMS Open Payments — General Payments 123636 supporting records · 49438 recipient NPIs · example record 1221811583 |
Jardiance · 2024 Exact normalized brand match · 1 Part D row |
65 | 15 |
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 |
|---|---|---|---|
| Furosemide | Furosemide | 1339 | 415 |
| Allopurinol | Allopurinol | 797 | 232 |
| Amlodipine Besylate | Amlodipine Besylate | 460 | 154 |
| Potassium Chloride | Potassium Chloride | 360 | 113 |
| Hydralazine Hcl | Hydralazine Hcl | 328 | 106 |
| Metoprolol Tartrate | Metoprolol Tartrate | 275 | 89 |
| Carvedilol | Carvedilol | 256 | 80 |
| Lisinopril | Lisinopril | 244 | 86 |
| Clinolipid | Fat Emulsion/Olive/Soy/Phospho | 225 | suppressed |
| Losartan Potassium | Losartan Potassium | 156 | 45 |
| Spironolactone | Spironolactone | 152 | 57 |
| Tamsulosin Hcl | Tamsulosin Hcl | 111 | 32 |
| Calcitriol | Calcitriol | 107 | 32 |
| Doxazosin Mesylate | Doxazosin Mesylate | 92 | 25 |
| Sevelamer Carbonate | Sevelamer Carbonate | 86 | 25 |
| Prosol | Parenteral Amino Acid 20% No.1 | 75 | suppressed |
| Pioglitazone Hcl | Pioglitazone Hcl | 74 | 20 |
| Metolazone | Metolazone | 69 | 21 |
| Bumetanide | Bumetanide | 65 | 23 |
| Jardiance | Empagliflozin | 65 | 15 |
| Midodrine Hcl | Midodrine Hcl | 63 | 28 |
| Metoprolol Succinate | Metoprolol Succinate | 59 | 23 |
| Febuxostat | Febuxostat | 57 | 15 |
| Farxiga | Dapagliflozin Propanediol | 55 | 11 |
| Finasteride | Finasteride | 55 | 20 |
| Clinisol | Parenteral Amino Acid 15% No.5 | 50 | suppressed |
| Levofloxacin | Levofloxacin | 48 | 24 |
| Ondansetron Odt | Ondansetron | 45 | 27 |
| Clonidine Hcl | Clonidine Hcl | 44 | 14 |
| Kerendia | Finerenone | 42 | 11 |
| Hydrochlorothiazide | Hydrochlorothiazide | 41 | 15 |
| Atorvastatin Calcium | Atorvastatin Calcium | 35 | suppressed |
| Diltiazem 24hr Er (Cd) | Diltiazem Hcl | 35 | suppressed |
| Klor-Con 10 | Potassium Chloride | 33 | 12 |
| Valsartan | Valsartan | 32 | 12 |
| Cinacalcet Hcl | Cinacalcet Hcl | 28 | suppressed |
| Colchicine | Colchicine | 28 | suppressed |
| Prednisone | Prednisone | 26 | 14 |
| Procrit | Epoetin Alfa | 25 | suppressed |
| Retacrit | Epoetin Alfa-Epbx | 24 | suppressed |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 23 | suppressed |
| Alprazolam | Alprazolam | 21 | suppressed |
| Atenolol | Atenolol | 20 | suppressed |
| Zolpidem Tartrate | Zolpidem Tartrate | 20 | suppressed |
| Acetazolamide | Acetazolamide | 19 | suppressed |
| Enalapril Maleate | Enalapril Maleate | 18 | suppressed |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 16 | suppressed |
| Escitalopram Oxalate | Escitalopram Oxalate | 15 | suppressed |
| Gabapentin | Gabapentin | 15 | suppressed |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 14 | suppressed |
| Alcohol Prep Pads | Alcohol Antiseptic Pads | 13 | suppressed |
| Ezetimibe | Ezetimibe | 12 | suppressed |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 12 | suppressed |
| Mirtazapine | Mirtazapine | 12 | suppressed |
| Benazepril Hcl | Benazepril Hcl | 11 | suppressed |
| Calcium Acetate | Calcium Acetate | 11 | suppressed |
| Cephalexin | Cephalexin | 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 | $725.31 · 32 records | Bayer Healthcare Pharmaceuticals Inc. | CRYSVITA, FUROSCIX, Fabhalta, IBSRELA, JARDIANCE, JYNARQUE, KRYSTEXXA, Kerendia, LUPKYNIS, TARPEYO, TAVNEOS, VELPHORO, VOYXACT, Vafseo, Veltassa, Yorvipath | 2 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Jardiance play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with Bayer Healthcare Pharmaceuticals 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