Payment overview · 2025
General Payments
$1,754.72
89 reported records · 16 companies
Healthcare provider profile · identity verified
Darine Kassar, M.D.
Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neuromuscular Medicine · SUGAR LAND, TX · NPI 1902035686
Verified facts
What the public records show
CMS Open Payments records show Darine Kassar, M.D. received $1,754.72 in general payments during 2025 across 89 reported records.
ABBVIE INC. accounted for 34.4% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 23 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Nurtec Odt.
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 NURTEC ODT as an associated drug or biological on 217574 records involving 54025 distinct recipient NPIs. Public Medicare Part D data also shows 37 claims for Nurtec Odt 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 GAMMAGARD LIQUID as an associated drug or biological on 29 records involving 8 distinct recipient NPIs. Public Medicare Part D data also shows 18 claims for Gammagard Liquid by this doctor in 2024.
Tanabe 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 Radicava ORS as an associated drug or biological on 38 records involving 8 distinct recipient NPIs. Public Medicare Part D data also shows 50 claims for Radicava Ors 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 | $604.02 | 34.4% | 37 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $219.54 | 12.5% | 15 | 2025 |
| Alexion Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $183.63 | 10.5% | 8 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $135.57 | 7.7% | 6 | 2025 |
| Janssen Biotech, Inc. | Unresolved — no canonical attribution shown | $125.22 | 7.1% | 2 | 2025 |
| UCB, Inc. | Unresolved — no canonical attribution shown | $90.30 | 5.2% | 4 | 2025 |
| Novartis Pharmaceuticals Corporation | Unresolved — no canonical attribution shown | $77.44 | 4.4% | 4 | 2025 |
| ACADIA Pharmaceuticals Inc | Unresolved — no canonical attribution shown | $52.99 | 3.0% | 2 | 2025 |
| EMD Serono, Inc. | Unresolved — no canonical attribution shown | $51.93 | 3.0% | 2 | 2025 |
| Genentech USA, Inc. | Unresolved — no canonical attribution shown | $45.33 | 2.6% | 2 | 2025 |
| Biogen, Inc. | Unresolved — no canonical attribution shown | $44.81 | 2.5% | 2 | 2025 |
| Takeda Pharmaceuticals U.S.A., Inc. | Unresolved — no canonical attribution shown | $30.21 | 1.7% | 1 | 2025 |
| Celgene Corporation | Unresolved — no canonical attribution shown | $28.03 | 1.6% | 1 | 2025 |
| Neurocrine BioSciences, Inc. | Unresolved — no canonical attribution shown | $23.72 | 1.4% | 1 | 2025 |
| Tanabe Pharma America, Inc. | Unresolved — no canonical attribution shown | $22.02 | 1.2% | 1 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $19.96 | 1.1% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $1,659.73 | 88 |
| Education | $94.99 | 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 |
|---|---|---|---|---|---|
| QULIPTA Normalized: qulipta |
Drug | ABBVIE INC. | $563.37 | 34 | 2025 |
Source payment records
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| UBRELVY Normalized: ubrelvy |
Drug | ABBVIE INC. | $330.36 | 20 | 2025 |
Source payment records
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| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $219.54 | 15 | 2025 |
Source payment records
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| ULTOMIRIS Normalized: ultomiris |
Biological | Alexion Pharmaceuticals, Inc. | $183.63 | 8 | 2025 |
Source payment records
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| BOTOX Normalized: botox |
Biological | ABBVIE INC. | $176.92 | 11 | 2025 |
Source payment records
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| ZAVZPRET Normalized: zavzpret |
Drug | PFIZER INC. | $137.59 | 10 | 2025 |
Source payment records
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| UPLIZNA Normalized: uplizna |
Biological | Amgen Inc. | $111.87 | 5 | 2025 |
Source payment records
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| Rystiggo Normalized: rystiggo |
Drug | UCB, Inc. | $90.30 | 4 | 2025 |
Source payment records
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| KESIMPTA Normalized: kesimpta |
Drug | Novartis Pharmaceuticals Corporation | $77.44 | 4 | 2025 |
Source payment records
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| NUPLAZID Normalized: nuplazid |
Drug | ACADIA Pharmaceuticals Inc | $52.99 | 2 | 2025 |
Source payment records
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| Ocrevus Zunovo Normalized: ocrevus zunovo |
Biological | Genentech USA, Inc. | $45.33 | 2 | 2025 |
Source payment records
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| HYQVIA Normalized: hyqvia |
Biological | Takeda Pharmaceuticals U.S.A., Inc. | $30.21 | 1 | 2025 |
Source payment records
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| ZEPOSIA Normalized: zeposia |
Drug | Celgene Corporation | $28.03 | 1 | 2025 |
Source payment records
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| TYSABRI Normalized: tysabri |
Biological | Biogen, Inc. | $26.62 | 1 | 2025 |
Source payment records
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| VUMERITY Normalized: vumerity |
Drug | Biogen, Inc. | $26.62 | 1 | 2025 |
Source payment records
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| INGREZZA Normalized: ingrezza |
Drug | Neurocrine BioSciences, Inc. | $23.72 | 1 | 2025 |
Source payment records
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| Radicava Normalized: radicava |
Drug | Tanabe Pharma America, Inc. | $22.02 | 1 | 2025 |
Source payment records
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| VYALEV Normalized: vyalev |
Drug | ABBVIE INC. | $21.32 | 1 | 2025 |
Source payment records
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| AMYVID Normalized: amyvid |
Drug | Lilly USA, LLC | $19.96 | 1 | 2025 |
Source payment records
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| KISUNLA Normalized: kisunla |
Drug | Lilly USA, LLC | $19.96 | 1 | 2025 |
Source payment records
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| QALSODY Normalized: qalsody |
Drug | Biogen, Inc. | $18.19 | 1 | 2025 |
Source payment records
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| SPINRAZA Normalized: spinraza |
Biological | Biogen, Inc. | $18.19 | 1 | 2025 |
Source payment records
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| VRAYLAR Normalized: vraylar |
Drug | ABBVIE INC. | $11.44 | 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 |
|---|---|---|---|---|---|---|
| NURTEC ODT nurtec odt |
2025 | Nurtec Odt | 2024 | 37 Beneficiary count suppressed |
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 |
|---|---|---|---|---|---|---|
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | NURTEC ODT open payments reported associated product |
CMS Open Payments — General Payments 217574 supporting records · 54025 recipient NPIs · example record 1228794063 |
Nurtec Odt · 2024 Exact normalized brand match · 1 Part D row |
37 | suppressed by CMS |
| Takeda Pharmaceuticals U.S.A., Inc. Exact reporting entity; no affiliate inference |
2025 | GAMMAGARD LIQUID open payments reported associated product |
CMS Open Payments — General Payments 29 supporting records · 8 recipient NPIs · example record 1223786557 |
Gammagard Liquid · 2024 Exact normalized brand match · 1 Part D row |
18 | suppressed by CMS |
| Tanabe Pharma America, Inc. Exact reporting entity; no affiliate inference |
2025 | Radicava ORS open payments reported associated product |
CMS Open Payments — General Payments 38 supporting records · 8 recipient NPIs · example record 1243917980 |
Radicava Ors · 2024 Exact normalized brand match · 1 Part D row |
50 | 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 |
|---|---|---|---|
| Gabapentin | Gabapentin | 172 | 50 |
| Memantine Hcl | Memantine Hcl | 169 | 33 |
| Duloxetine Hcl | Duloxetine Hcl | 114 | 32 |
| Donepezil Hcl | Donepezil Hcl | 83 | 32 |
| Mycophenolate Mofetil | Mycophenolate Mofetil | 65 | 14 |
| Pregabalin | Pregabalin | 62 | 20 |
| Amitriptyline Hcl | Amitriptyline Hcl | 57 | 17 |
| Radicava Ors | Edaravone | 50 | suppressed |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 39 | 12 |
| Prednisone | Prednisone | 38 | 11 |
| Nurtec Odt | Rimegepant Sulfate | 37 | suppressed |
| Pyridostigmine Bromide | Pyridostigmine Bromide | 35 | 11 |
| Nortriptyline Hcl | Nortriptyline Hcl | 34 | suppressed |
| Levetiracetam | Levetiracetam | 32 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 29 | suppressed |
| Primidone | Primidone | 29 | suppressed |
| Baclofen | Baclofen | 26 | suppressed |
| Atorvastatin Calcium | Atorvastatin Calcium | 23 | suppressed |
| Riluzole | Riluzole | 23 | suppressed |
| Trazodone Hcl | Trazodone Hcl | 21 | suppressed |
| Gammaked | Immune Globul G/Gly/Iga Avg 46 | 20 | suppressed |
| Gammagard Liquid | Immun Glob G(Igg)/Gly/Iga Ov50 | 18 | suppressed |
| Topiramate | Topiramate | 18 | suppressed |
| Clopidogrel | Clopidogrel Bisulfate | 16 | suppressed |
| Gammaplex | Immun Glob G(Igg)/Gly/Iga 0-50 | 15 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 14 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 14 | suppressed |
| Carbidopa-Levodopa Er | Carbidopa/Levodopa | 13 | suppressed |
| Cyanocobalamin Injection | Cyanocobalamin (Vitamin B-12) | 13 | suppressed |
| Modafinil | Modafinil | 13 | suppressed |
| Phenobarbital | Phenobarbital | 13 | suppressed |
| Tizanidine Hcl | Tizanidine Hcl | 13 | suppressed |
| Dilantin | Phenytoin Sodium Extended | 12 | suppressed |
| Gamunex-C | Immune Globul G/Gly/Iga Avg 46 | 12 | suppressed |
| Methylprednisolone Sodium Succ | Methylprednisolone Sod Succ | 12 | suppressed |
| Verapamil Er | Verapamil Hcl | 12 | suppressed |
| Avonex Pen (4 Pack) | Interferon Beta-1a | 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 | $1,754.72 · 89 records | ABBVIE INC. | AMYVID, BOTOX, HYQVIA, INGREZZA, KESIMPTA, KISUNLA, NUPLAZID, NURTEC ODT, Ocrevus Zunovo, QALSODY, QULIPTA, Radicava, Rystiggo, SPINRAZA, TYSABRI, UBRELVY, ULTOMIRIS, UPLIZNA, VRAYLAR, VUMERITY, VYALEV, ZAVZPRET, ZEPOSIA | 3 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Nurtec Odt play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with PFIZER 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