Payment overview · 2025
General Payments
187 reported records · 31 companies
Healthcare provider profile · identity verified
Allopathic & Osteopathic Physicians|Internal Medicine|Pulmonary Disease · PHOENIX, AZ · NPI 1053379263
Verified facts
CMS Open Payments records show Da-Wei Liao, MD received $50,999.32 in general payments during 2025 across 187 reported records.
GENZYME CORPORATION accounted for 30.1% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 38 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Esbriet, Opsumit, Tezspire, Trelegy Ellipta, Zemaira.
Actelion Pharmaceuticals US, 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 OPSUMIT as an associated drug or biological on 18955 records involving 8899 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Opsumit by this doctor in 2024.
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 TEZSPIRE as an associated drug or biological on 22824 records involving 7320 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Tezspire 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 SYMBICORT as an associated drug or biological on 71 records involving 51 distinct recipient NPIs. Public Medicare Part D data also shows 74 claims for Symbicort 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 TEZSPIRE as an associated drug or biological on 33983 records involving 10291 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Tezspire 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 OFEV as an associated drug or biological on 14236 records involving 6873 distinct recipient NPIs. Public Medicare Part D data also shows 30 claims for Ofev by this doctor in 2024.
Genentech USA, 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 Esbriet as an associated drug or biological on 16 records involving 16 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Esbriet 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 TRELEGY ELLIPTA as an associated drug or biological on 131532 records involving 37148 distinct recipient NPIs. Public Medicare Part D data also shows 499 claims for Trelegy Ellipta by this doctor in 2024.
Vifor Pharma, 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 Zemaira as an associated drug or biological on 1409 records involving 818 distinct recipient NPIs. Public Medicare Part D data also shows 22 claims for Zemaira by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Payment overview · 2025
187 reported records · 31 companies
Separate record types
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?
| Reported company | Canonical company | Amount | Share | Records | Year |
|---|---|---|---|---|---|
| GENZYME CORPORATION | Unresolved — no canonical attribution shown | $15,338.96 | 30.1% | 29 | 2025 |
| GlaxoSmithKline, LLC. | Unresolved — no canonical attribution shown | $14,409.69 | 28.2% | 29 | 2025 |
| AstraZeneca Pharmaceuticals LP | Unresolved — no canonical attribution shown | $9,555.87 | 18.7% | 36 | 2025 |
| Grifols Shared Services North America, Inc. | Unresolved — no canonical attribution shown | $6,943.67 | 13.6% | 2 | 2025 |
| Regeneron Healthcare Solutions, Inc. | Unresolved — no canonical attribution shown | $2,591.53 | 5.1% | 12 | 2025 |
| Actelion Pharmaceuticals US, Inc. | Unresolved — no canonical attribution shown | $294.97 | 0.6% | 8 | 2025 |
| Viatris Specialty LLC | Unresolved — no canonical attribution shown | $273.02 | 0.5% | 6 | 2025 |
| Merck Sharp & Dohme LLC | Unresolved — no canonical attribution shown | $252.05 | 0.5% | 11 | 2025 |
| United Therapeutics Corporation | Unresolved — no canonical attribution shown | $243.08 | 0.5% | 8 | 2025 |
| Genentech USA, Inc. | Unresolved — no canonical attribution shown | $181.33 | 0.4% | 3 | 2025 |
| Electromed, Inc. | Unresolved — no canonical attribution shown | $103.31 | 0.2% | 13 | 2025 |
| Pulmonx Corporation | Unresolved — no canonical attribution shown | $98.44 | 0.2% | 5 | 2025 |
| SANOFI-AVENTIS U.S. LLC | Unresolved — no canonical attribution shown | $78.99 | 0.1% | 1 | 2025 |
| Verona Pharma, Inc. | Unresolved — no canonical attribution shown | $67.38 | 0.1% | 2 | 2025 |
| Grifols USA, LLC | Unresolved — no canonical attribution shown | $59.31 | 0.1% | 2 | 2025 |
| Genentech, Inc. | Unresolved — no canonical attribution shown | $56.05 | 0.1% | 1 | 2025 |
| Novartis Pharmaceuticals Corporation | Unresolved — no canonical attribution shown | $53.32 | 0.1% | 2 | 2025 |
| Mallinckrodt Hospital Products Inc. | Unresolved — no canonical attribution shown | $53.00 | 0.1% | 2 | 2025 |
| Baxter Healthcare | Unresolved — no canonical attribution shown | $42.69 | 0.1% | 2 | 2025 |
| Vifor Pharma, Inc. | Unresolved — no canonical attribution shown | $35.16 | 0.1% | 1 | 2025 |
| JAZZ PHARMACEUTICALS INC. | Unresolved — no canonical attribution shown | $31.90 | 0.1% | 1 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $31.90 | 0.1% | 2 | 2025 |
| Insmed, Inc. | Unresolved — no canonical attribution shown | $30.39 | 0.1% | 1 | 2025 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $29.14 | 0.1% | 1 | 2025 |
| ANI Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $28.28 | 0.1% | 1 | 2025 |
| Takeda Pharmaceuticals U.S.A., Inc. | Unresolved — no canonical attribution shown | $21.50 | 0.0% | 1 | 2025 |
| INOGEN, INC. | Unresolved — no canonical attribution shown | $20.09 | 0.0% | 1 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $19.77 | 0.0% | 1 | 2025 |
| ABIOMED | Unresolved — no canonical attribution shown | $18.60 | 0.0% | 1 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $18.06 | 0.0% | 1 | 2025 |
| Inspire Medical Systems, Inc. | Unresolved — no canonical attribution shown | $17.87 | 0.0% | 1 | 2025 |
What were the payments for?
| Category | Amount | Records |
|---|---|---|
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $36,128.80 | 20 |
| Consulting Fee | $8,837.50 | 2 |
| Food and Beverage | $4,850.45 | 149 |
| Travel and Lodging | $954.71 | 12 |
| Education | $227.86 | 4 |
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
| Reported product | Type | Reported company | Related amount* | Records | Year |
|---|---|---|---|---|---|
| DUPIXENT Normalized: dupixent |
Biological | GENZYME CORPORATION, Regeneron Healthcare Solutions, Inc., SANOFI-AVENTIS U.S. LLC | $18,009.48 | 42 | 2025 |
Source payment records
|
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| NUCALA Normalized: nucala |
Biological | GlaxoSmithKline, LLC. | $12,323.99 | 21 | 2025 |
Source payment records
|
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| FASENRA Normalized: fasenra |
Biological | AstraZeneca Pharmaceuticals LP | $9,030.83 | 26 | 2025 |
Source payment records
|
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| Prolastin-C Liquid Normalized: prolastin c liquid |
Biological | Grifols Shared Services North America, Inc., Grifols USA, LLC | $7,002.98 | 4 | 2025 |
Source payment records
|
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| TEZSPIRE Normalized: tezspire |
Biological | Amgen Inc., AstraZeneca Pharmaceuticals LP | $475.26 | 7 | 2025 |
Source payment records
|
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| BREZTRI Normalized: breztri |
Drug | AstraZeneca Pharmaceuticals LP | $326.75 | 4 | 2025 |
Source payment records
|
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| UPTRAVI Normalized: uptravi |
Drug | Actelion Pharmaceuticals US, Inc. | $269.68 | 7 | 2025 |
Source payment records
|
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| XOLAIR Normalized: xolair |
Biological, Drug | Genentech USA, Inc., Novartis Pharmaceuticals Corporation | $234.65 | 5 | 2025 |
Source payment records
|
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| OPSUMIT Normalized: opsumit |
Drug | Actelion Pharmaceuticals US, Inc. | $229.60 | 6 | 2025 |
Source payment records
|
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| ZERBAXA Normalized: zerbaxa |
Drug | Merck Sharp & Dohme LLC | $175.85 | 8 | 2025 |
Source payment records
|
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| AIRSUPRA Normalized: airsupra |
Drug | AstraZeneca Pharmaceuticals LP | $166.91 | 1 | 2025 |
Source payment records
|
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| TOBI PODHALER Normalized: tobi podhaler |
Drug | Viatris Specialty LLC | $136.00 | 1 | 2025 |
Source payment records
|
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| Tyvaso Normalized: tyvaso |
Drug | United Therapeutics Corporation | $135.78 | 6 | 2025 |
Source payment records
|
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| TRELEGY ELLIPTA Normalized: trelegy ellipta |
Drug | GlaxoSmithKline, LLC. | $135.70 | 7 | 2025 |
Source payment records
|
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| Esbriet Normalized: esbriet |
Biological | Genentech USA, Inc. | $124.90 | 1 | 2025 |
Source payment records
|
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| Pulmozyme Normalized: pulmozyme |
Biological | Genentech USA, Inc. | $124.90 | 1 | 2025 |
Source payment records
|
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| SMARTVEST Normalized: smartvest |
Device | Electromed, Inc. | $103.31 | 13 | 2025 |
Source payment records
|
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| CHARTIS CATHETER Normalized: chartis catheter |
Device | Pulmonx Corporation | $98.44 | 5 | 2025 |
Source payment records
|
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| PULMONX CHARTIS TABLET CONSOLE Normalized: pulmonx chartis tablet console |
Device | Pulmonx Corporation | $98.44 | 5 | 2025 |
Source payment records
|
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| ZEPHYR DELIVERY CATHETER Normalized: zephyr delivery catheter |
Device | Pulmonx Corporation | $98.44 | 5 | 2025 |
Source payment records
|
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| ZEPHYR ENDOBRONCHIAL VALVE Normalized: zephyr endobronchial valve |
Device | Pulmonx Corporation | $98.44 | 5 | 2025 |
Source payment records
|
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| YUPELRI Normalized: yupelri |
Drug | Viatris Specialty LLC | $92.84 | 4 | 2025 |
Source payment records
|
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| WINREVAIR Normalized: winrevair |
Biological | Merck Sharp & Dohme LLC | $76.20 | 3 | 2025 |
Source payment records
|
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| Ohtuvayre Normalized: ohtuvayre |
Drug | Verona Pharma, Inc. | $67.38 | 2 | 2025 |
Source payment records
|
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| OPSYNVI Normalized: opsynvi |
Drug | Actelion Pharmaceuticals US, Inc. | $65.37 | 2 | 2025 |
Source payment records
|
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| ACTHAR Normalized: acthar |
Biological | Mallinckrodt Hospital Products Inc. | $53.00 | 2 | 2025 |
Source payment records
|
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| Hillrom - Vest System Model 105 Home Care Normalized: hillrom vest system model 105 home care |
Device | Baxter Healthcare | $42.69 | 2 | 2025 |
Source payment records
|
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| Zemaira Normalized: zemaira |
Biological | Vifor Pharma, Inc. | $35.16 | 1 | 2025 |
Source payment records
|
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| XYWAV Normalized: xywav |
Drug | JAZZ PHARMACEUTICALS INC. | $31.90 | 1 | 2025 |
Source payment records
|
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| ZEPBOUND Normalized: zepbound |
Drug | Lilly USA, LLC | $31.90 | 2 | 2025 |
Source payment records
|
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| Arikayce Normalized: arikayce |
Drug | Insmed, Inc. | $30.39 | 1 | 2025 |
Source payment records
|
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| IMFINZI Normalized: imfinzi |
Biological | AstraZeneca Pharmaceuticals LP | $30.16 | 1 | 2025 |
Source payment records
|
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| JASCAYD Normalized: jascayd |
Drug | Boehringer Ingelheim Pharmaceuticals, Inc. | $29.14 | 1 | 2025 |
Source payment records
|
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| PURIFIED CORTROPHIN GEL Normalized: purified cortrophin gel |
Drug | ANI Pharmaceuticals, Inc. | $28.28 | 1 | 2025 |
Source payment records
|
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| GLASSIA Normalized: glassia |
Biological | Takeda Pharmaceuticals U.S.A., Inc. | $21.50 | 1 | 2025 |
Source payment records
|
|||||
| INOGEN ONE G5 OXYGEN CONCENTRATOR - BLUETOOTH Normalized: inogen one g5 oxygen concentrator bluetooth |
Device | INOGEN, INC. | $20.09 | 1 | 2025 |
Source payment records
|
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| CREON Normalized: creon |
Drug | ABBVIE INC. | $19.77 | 1 | 2025 |
Source payment records
|
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| INSPIRE Normalized: inspire |
Device | Inspire Medical Systems, Inc. | $17.87 | 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.
| Open Payments product | Payment year | Part D brand | Part D year | Claims | Match method | Source |
|---|---|---|---|---|---|---|
| Esbriet esbriet |
2025 | Esbriet | 2024 | 11 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| OPSUMIT opsumit |
2025 | Opsumit | 2024 | 15 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| TEZSPIRE tezspire |
2025 | Tezspire | 2024 | 12 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| TRELEGY ELLIPTA trelegy ellipta |
2025 | Trelegy Ellipta | 2024 | 499 | exact normalized | Medicare Part D |
| Zemaira zemaira |
2025 | Zemaira | 2024 | 22 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
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 |
|---|---|---|---|---|---|---|
| Actelion Pharmaceuticals US, Inc. Exact reporting entity; no affiliate inference |
2025 | OPSUMIT open payments reported associated product |
CMS Open Payments — General Payments 18955 supporting records · 8899 recipient NPIs · example record 1174163978 |
Opsumit · 2024 Exact normalized brand match · 1 Part D row |
15 | suppressed by CMS |
| Amgen Inc. Exact reporting entity; no affiliate inference |
2025 | TEZSPIRE open payments reported associated product |
CMS Open Payments — General Payments 22824 supporting records · 7320 recipient NPIs · example record 1226871881 |
Tezspire · 2024 Exact normalized brand match · 1 Part D row |
12 | suppressed by CMS |
| AstraZeneca Pharmaceuticals LP Exact reporting entity; no affiliate inference |
2025 | SYMBICORT open payments reported associated product |
CMS Open Payments — General Payments 71 supporting records · 51 recipient NPIs · example record 1206132610 |
Symbicort · 2024 Exact normalized brand match · 1 Part D row |
74 | 28 |
| AstraZeneca Pharmaceuticals LP Exact reporting entity; no affiliate inference |
2025 | TEZSPIRE open payments reported associated product |
CMS Open Payments — General Payments 33983 supporting records · 10291 recipient NPIs · example record 1206131392 |
Tezspire · 2024 Exact normalized brand match · 1 Part D row |
12 | suppressed by CMS |
| Boehringer Ingelheim Pharmaceuticals, Inc. Exact reporting entity; no affiliate inference |
2025 | OFEV open payments reported associated product |
CMS Open Payments — General Payments 14236 supporting records · 6873 recipient NPIs · example record 1221811762 |
Ofev · 2024 Exact normalized brand match · 1 Part D row |
30 | suppressed by CMS |
| Genentech USA, Inc. Exact reporting entity; no affiliate inference |
2025 | Esbriet open payments reported associated product |
CMS Open Payments — General Payments 16 supporting records · 16 recipient NPIs · example record 1211492907 |
Esbriet · 2024 Exact normalized brand match · 1 Part D row |
11 | suppressed by CMS |
| GlaxoSmithKline, LLC. Exact reporting entity; no affiliate inference |
2025 | TRELEGY ELLIPTA open payments reported associated product |
CMS Open Payments — General Payments 131532 supporting records · 37148 recipient NPIs · example record 1190332369 |
Trelegy Ellipta · 2024 Exact normalized brand match · 1 Part D row |
499 | 97 |
| Vifor Pharma, Inc. Exact reporting entity; no affiliate inference |
2025 | Zemaira open payments reported associated product |
CMS Open Payments — General Payments 1409 supporting records · 818 recipient NPIs · example record 1172020727 |
Zemaira · 2024 Exact normalized brand match · 1 Part D row |
22 | 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
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Trelegy Ellipta | Fluticasone/Umeclidin/Vilanter | 499 | 97 |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 305 | 112 |
| Prednisone | Prednisone | 211 | 87 |
| Montelukast Sodium | Montelukast Sodium | 199 | 60 |
| Breztri Aerosphere | Budesonide/Glycopyr/Formoterol | 158 | 35 |
| Breo Ellipta | Fluticasone/Vilanterol | 146 | 40 |
| Anoro Ellipta | Umeclidinium Brm/Vilanterol Tr | 132 | 19 |
| Symbicort | Budesonide/Formoterol Fumarate | 74 | 28 |
| Azithromycin | Azithromycin | 72 | 33 |
| Stiolto Respimat | Tiotropium Br/Olodaterol Hcl | 66 | suppressed |
| Fluconazole | Fluconazole | 51 | 16 |
| Azelastine Hcl | Azelastine Hcl | 47 | 19 |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 44 | 30 |
| Breyna | Budesonide/Formoterol Fumarate | 43 | 12 |
| Fluticasone Propionate | Fluticasone Propionate | 37 | 17 |
| Arnuity Ellipta | Fluticasone Furoate | 33 | suppressed |
| Fluticasone-Salmeterol | Fluticasone Propion/Salmeterol | 33 | 12 |
| Cefdinir | Cefdinir | 30 | 25 |
| Ofev | Nintedanib Esylate | 30 | suppressed |
| Pirfenidone | Pirfenidone | 29 | suppressed |
| Roflumilast | Roflumilast | 29 | suppressed |
| Ipratropium Bromide | Ipratropium Bromide | 28 | 11 |
| Spiriva Respimat | Tiotropium Bromide | 28 | suppressed |
| Wixela Inhub | Fluticasone Propion/Salmeterol | 28 | 12 |
| Levofloxacin | Levofloxacin | 26 | 17 |
| Zemaira | Alpha-1-Proteinase Inhibitor | 22 | suppressed |
| Pantoprazole Sodium | Pantoprazole Sodium | 20 | suppressed |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 19 | 17 |
| Dulera | Mometasone/Formoterol | 19 | suppressed |
| Ventolin Hfa | Albuterol Sulfate | 19 | suppressed |
| Incruse Ellipta | Umeclidinium Bromide | 17 | suppressed |
| Mirtazapine | Mirtazapine | 17 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 16 | suppressed |
| Dupixent Syringe | Dupilumab | 15 | suppressed |
| Opsumit | Macitentan | 15 | suppressed |
| Furosemide | Furosemide | 14 | suppressed |
| Gabapentin | Gabapentin | 14 | suppressed |
| Atorvastatin Calcium | Atorvastatin Calcium | 13 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 12 | suppressed |
| Kalydeco | Ivacaftor | 12 | suppressed |
| Levalbuterol Tartrate Hfa | Levalbuterol Tartrate | 12 | suppressed |
| Temazepam | Temazepam | 12 | suppressed |
| Tezspire | Tezepelumab-Ekko | 12 | suppressed |
| Theophylline Er | Theophylline Anhydrous | 12 | suppressed |
| Trikafta | Elexacaftor/Tezacaftor/Ivacaft | 12 | suppressed |
| Eliquis | Apixaban | 11 | suppressed |
| Esbriet | Pirfenidone | 11 | suppressed |
| Varenicline Tartrate | Varenicline Tartrate | 11 | suppressed |
Timeline
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 | $50,999.32 · 187 records | GENZYME CORPORATION | ACTHAR, AIRSUPRA, Arikayce, BREZTRI, CHARTIS CATHETER, CREON, DUPIXENT, Esbriet, FASENRA, GLASSIA, Hillrom - Vest System Model 105 Home Care, IMFINZI, INOGEN ONE G5 OXYGEN CONCENTRATOR - BLUETOOTH, INSPIRE, JASCAYD, NUCALA, OPSUMIT, OPSYNVI, Ohtuvayre, PULMONX CHARTIS TABLET CONSOLE, PURIFIED CORTROPHIN GEL, Prolastin-C Liquid, Pulmozyme, SMARTVEST, TEZSPIRE, TOBI PODHALER, TRELEGY ELLIPTA, Tyvaso, UPTRAVI, WINREVAIR, XOLAIR, XYWAV, YUPELRI, ZEPBOUND, ZEPHYR DELIVERY CATHETER, ZEPHYR ENDOBRONCHIAL VALVE, ZERBAXA, Zemaira | 8 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
These are general questions generated from reviewed templates. They are not personalized medical advice.
Sources and limitations
| 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