Payment overview · 2025
General Payments
$24,372.97
22 reported records · 8 companies
Healthcare provider profile · identity verified
Vivek K Narayan, MD
Allopathic & Osteopathic Physicians|Internal Medicine|Medical Oncology · PHILADELPHIA, PA · NPI 1346568011
Verified facts
What the public records show
CMS Open Payments records show Vivek K Narayan, MD received $24,372.97 in general payments during 2025 across 22 reported records.
Sumitomo Pharma America, Inc. accounted for 28.6% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 7 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Cabometyx, Welireg, Xtandi.
Astellas Pharma Global Development reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Xtandi as an associated drug or biological on 160 records involving 130 distinct recipient NPIs. Public Medicare Part D data also shows 108 claims for Xtandi by this doctor in 2024.
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 Nubeqa as an associated drug or biological on 24369 records involving 9557 distinct recipient NPIs. Public Medicare Part D data also shows 23 claims for Nubeqa by this doctor in 2024.
Exelixis 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 CABOMETYX as an associated drug or biological on 11749 records involving 4526 distinct recipient NPIs. Public Medicare Part D data also shows 39 claims for Cabometyx by this doctor in 2024.
Merck Sharp & Dohme 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 LENVIMA as an associated drug or biological on 66 records involving 58 distinct recipient NPIs. Public Medicare Part D data also shows 27 claims for Lenvima by this doctor in 2024.
Merck Sharp & Dohme 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 WELIREG as an associated drug or biological on 8369 records involving 5216 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Welireg 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 INLYTA as an associated drug or biological on 2646 records involving 1964 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Inlyta 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 ORGOVYX as an associated drug or biological on 16373 records involving 6981 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Orgovyx 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 XTANDI as an associated drug or biological on 19368 records involving 7657 distinct recipient NPIs. Public Medicare Part D data also shows 108 claims for Xtandi by this doctor in 2024.
Sumitomo Pharma America, 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 ORGOVYX as an associated drug or biological on 17129 records involving 6223 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Orgovyx 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 |
|---|---|---|---|---|---|
| Sumitomo Pharma America, Inc. | Unresolved — no canonical attribution shown | $6,975.00 | 28.6% | 3 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $6,639.55 | 27.2% | 4 | 2025 |
| Exelixis Inc. | Unresolved — no canonical attribution shown | $3,530.71 | 14.5% | 8 | 2025 |
| Bayer Healthcare Pharmaceuticals Inc. | Unresolved — no canonical attribution shown | $3,456.00 | 14.2% | 1 | 2025 |
| Astellas Pharma Global Development | Unresolved — no canonical attribution shown | $2,100.00 | 8.6% | 1 | 2025 |
| Merck Sharp & Dohme LLC | Unresolved — no canonical attribution shown | $1,590.00 | 6.5% | 3 | 2025 |
| AstraZeneca Pharmaceuticals LP | Unresolved — no canonical attribution shown | $64.06 | 0.3% | 1 | 2025 |
| Caris MPI, Inc. | Unresolved — no canonical attribution shown | $17.65 | 0.1% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Consulting Fee | $19,161.00 | 9 |
| Honoraria | $2,310.00 | 1 |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $1,500.00 | 1 |
| Food and Beverage | $742.23 | 7 |
| Travel and Lodging | $655.96 | 3 |
| Education | $3.78 | 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 |
|---|---|---|---|---|---|
| TALZENNA Normalized: talzenna |
Drug | PFIZER INC. | $5,043.78 | 2 | 2025 |
Source payment records
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| CABOMETYX Normalized: cabometyx |
Drug | Exelixis Inc. | $3,530.71 | 8 | 2025 |
Source payment records
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| Kerendia Normalized: kerendia |
Drug | Bayer Healthcare Pharmaceuticals Inc. | $3,456.00 | 1 | 2025 |
Source payment records
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| XTANDI Normalized: xtandi |
Drug | Astellas Pharma Global Development, PFIZER INC. | $2,103.78 | 2 | 2025 |
Source payment records
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| WELIREG Normalized: welireg |
Drug | Merck Sharp & Dohme LLC | $530.00 | 1 | 2025 |
Source payment records
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| PADCEV Normalized: padcev |
Biological | PFIZER INC. | $95.77 | 1 | 2025 |
Source payment records
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| MI CANCER SEEK Normalized: mi cancer seek |
Device | Caris MPI, Inc. | $17.65 | 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 |
|---|---|---|---|---|---|---|
| CABOMETYX cabometyx |
2025 | Cabometyx | 2024 | 39 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| WELIREG welireg |
2025 | Welireg | 2024 | 15 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| XTANDI xtandi |
2025 | Xtandi | 2024 | 108 | 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 |
|---|---|---|---|---|---|---|
| Astellas Pharma Global Development Exact reporting entity; no affiliate inference |
2025 | Xtandi open payments reported associated product |
CMS Open Payments — General Payments 160 supporting records · 130 recipient NPIs · example record 1234123543 |
Xtandi · 2024 Exact normalized brand match · 1 Part D row |
108 | 22 |
| Bayer Healthcare Pharmaceuticals Inc. Exact reporting entity; no affiliate inference |
2025 | Nubeqa open payments reported associated product |
CMS Open Payments — General Payments 24369 supporting records · 9557 recipient NPIs · example record 1225434669 |
Nubeqa · 2024 Exact normalized brand match · 1 Part D row |
23 | suppressed by CMS |
| Exelixis Inc. Exact reporting entity; no affiliate inference |
2025 | CABOMETYX open payments reported associated product |
CMS Open Payments — General Payments 11749 supporting records · 4526 recipient NPIs · example record 1218789893 |
Cabometyx · 2024 Exact normalized brand match · 1 Part D row |
39 | suppressed by CMS |
| Merck Sharp & Dohme LLC Exact reporting entity; no affiliate inference |
2025 | LENVIMA open payments reported associated product |
CMS Open Payments — General Payments 66 supporting records · 58 recipient NPIs · example record 1237995778 |
Lenvima · 2024 Exact normalized brand match · 1 Part D row |
27 | suppressed by CMS |
| Merck Sharp & Dohme LLC Exact reporting entity; no affiliate inference |
2025 | WELIREG open payments reported associated product |
CMS Open Payments — General Payments 8369 supporting records · 5216 recipient NPIs · example record 1237992280 |
Welireg · 2024 Exact normalized brand match · 1 Part D row |
15 | suppressed by CMS |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | INLYTA open payments reported associated product |
CMS Open Payments — General Payments 2646 supporting records · 1964 recipient NPIs · example record 1228795917 |
Inlyta · 2024 Exact normalized brand match · 1 Part D row |
15 | suppressed by CMS |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | ORGOVYX open payments reported associated product |
CMS Open Payments — General Payments 16373 supporting records · 6981 recipient NPIs · example record 1228794230 |
Orgovyx · 2024 Exact normalized brand match · 1 Part D row |
16 | suppressed by CMS |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | XTANDI open payments reported associated product |
CMS Open Payments — General Payments 19368 supporting records · 7657 recipient NPIs · example record 1228794230 |
Xtandi · 2024 Exact normalized brand match · 1 Part D row |
108 | 22 |
| Sumitomo Pharma America, Inc. Exact reporting entity; no affiliate inference |
2025 | ORGOVYX open payments reported associated product |
CMS Open Payments — General Payments 17129 supporting records · 6223 recipient NPIs · example record 1176593507 |
Orgovyx · 2024 Exact normalized brand match · 1 Part D row |
16 | 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 |
|---|---|---|---|
| Xtandi | Enzalutamide | 108 | 22 |
| Prednisone | Prednisone | 49 | 18 |
| Abiraterone Acetate | Abiraterone Acetate | 45 | 11 |
| Cabometyx | Cabozantinib S-Malate | 39 | suppressed |
| Lenvima | Lenvatinib Mesylate | 27 | suppressed |
| Bicalutamide | Bicalutamide | 26 | 23 |
| Nubeqa | Darolutamide | 23 | suppressed |
| Orgovyx | Relugolix | 16 | suppressed |
| Inlyta | Axitinib | 15 | suppressed |
| Levothyroxine Sodium | Levothyroxine Sodium | 15 | suppressed |
| Welireg | Belzutifan | 15 | suppressed |
| Klor-Con M20 | Potassium Chloride | 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 | $24,372.97 · 22 records | Sumitomo Pharma America, Inc. | CABOMETYX, Kerendia, MI CANCER SEEK, PADCEV, TALZENNA, WELIREG, XTANDI | 9 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Cabometyx play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with Astellas Pharma Global Development?
- 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