Payment overview · 2025
General Payments
146 reported records · 22 companies
Healthcare provider profile · identity verified
Allopathic & Osteopathic Physicians|General Practice · NEW YORK, NY · NPI 1770592685
Verified facts
CMS Open Payments records show Alexander Chun, M.D. received $3,270.79 in general payments during 2025 across 146 reported records.
ABBVIE INC. accounted for 17.4% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 29 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Biktarvy, Dovato, Linzess, Rinvoq, Xifaxan.
ABBVIE 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 LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 23 claims for Linzess by this doctor in 2024.
ABBVIE 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 QULIPTA as an associated drug or biological on 298617 records involving 58957 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Qulipta by this doctor in 2024.
ABBVIE 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 RINVOQ as an associated drug or biological on 279238 records involving 34343 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Rinvoq by this doctor in 2024.
Gilead Sciences, 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 Biktarvy as an associated drug or biological on 8065 records involving 2759 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Biktarvy by this doctor in 2024.
Lilly USA, 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 JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Jardiance by this doctor in 2024.
Novo Nordisk 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 Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 22 claims for Ozempic 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 25 claims for Eliquis by this doctor in 2024.
Salix Pharmaceuticals, a division of Bausch Health US, 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 XIFAXAN as an associated drug or biological on 101901 records involving 33018 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Xifaxan 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 GATTEX as an associated drug or biological on 5737 records involving 3682 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Gattex by this doctor in 2024.
ViiV Healthcare Company reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported DOVATO as an associated drug or biological on 18732 records involving 3540 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Dovato by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Payment overview · 2025
146 reported records · 22 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 |
|---|---|---|---|---|---|
| ABBVIE INC. | Unresolved — no canonical attribution shown | $567.88 | 17.4% | 27 | 2025 |
| Gilead Sciences, Inc. | Unresolved — no canonical attribution shown | $561.28 | 17.2% | 25 | 2025 |
| QOL Medical, LLC | Unresolved — no canonical attribution shown | $441.24 | 13.5% | 11 | 2025 |
| ViiV Healthcare Company | Unresolved — no canonical attribution shown | $273.40 | 8.4% | 11 | 2025 |
| Takeda Pharmaceuticals U.S.A., Inc. | Unresolved — no canonical attribution shown | $210.66 | 6.4% | 10 | 2025 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | Unresolved — no canonical attribution shown | $205.70 | 6.3% | 17 | 2025 |
| Ardelyx, Inc. | Unresolved — no canonical attribution shown | $179.25 | 5.5% | 7 | 2025 |
| Celltrion USA Inc. | Unresolved — no canonical attribution shown | $178.50 | 5.5% | 8 | 2025 |
| Novo Nordisk Inc | Unresolved — no canonical attribution shown | $169.74 | 5.2% | 8 | 2025 |
| AstraZeneca Pharmaceuticals LP | Unresolved — no canonical attribution shown | $89.54 | 2.7% | 5 | 2025 |
| Janssen Biotech, Inc. | Unresolved — no canonical attribution shown | $61.79 | 1.9% | 2 | 2025 |
| Exact Sciences Corporation | Unresolved — no canonical attribution shown | $45.44 | 1.4% | 2 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $42.55 | 1.3% | 2 | 2025 |
| GENZYME CORPORATION | Unresolved — no canonical attribution shown | $36.20 | 1.1% | 1 | 2025 |
| Intra-Sana Laboratories | Unresolved — no canonical attribution shown | $35.47 | 1.1% | 2 | 2025 |
| Regeneron Healthcare Solutions, Inc. | Unresolved — no canonical attribution shown | $31.19 | 0.9% | 1 | 2025 |
| Merck Sharp & Dohme LLC | Unresolved — no canonical attribution shown | $29.19 | 0.9% | 1 | 2025 |
| Phathom Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $25.99 | 0.8% | 2 | 2025 |
| VIVUS LLC | Unresolved — no canonical attribution shown | $25.62 | 0.8% | 1 | 2025 |
| Intercept Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $21.05 | 0.6% | 1 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $20.79 | 0.6% | 1 | 2025 |
| Bavarian Nordic A/S | Unresolved — no canonical attribution shown | $18.32 | 0.6% | 1 | 2025 |
What were the payments for?
| Category | Amount | Records |
|---|---|---|
| Food and Beverage | $3,270.79 | 146 |
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 |
|---|---|---|---|---|---|
| Sucraid Normalized: sucraid |
Drug | QOL Medical, LLC | $441.24 | 11 | 2025 |
Source payment records
|
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| RINVOQ Normalized: rinvoq |
Biological | ABBVIE INC. | $285.71 | 14 | 2025 |
Source payment records
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| SKYRIZI Normalized: skyrizi |
Biological | ABBVIE INC. | $285.71 | 14 | 2025 |
Source payment records
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| CREON Normalized: creon |
Drug | ABBVIE INC. | $239.07 | 11 | 2025 |
Source payment records
|
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| ENTYVIO Normalized: entyvio |
Biological | Takeda Pharmaceuticals U.S.A., Inc. | $210.66 | 10 | 2025 |
Source payment records
|
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| XIFAXAN Normalized: xifaxan |
Drug | Salix Pharmaceuticals, a division of Bausch Health US, LLC | $205.70 | 17 | 2025 |
Source payment records
|
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| IBSRELA Normalized: ibsrela |
Drug | Ardelyx, Inc. | $179.25 | 7 | 2025 |
Source payment records
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| DOVATO Normalized: dovato |
Drug | ViiV Healthcare Company | $179.23 | 8 | 2025 |
Source payment records
|
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| LINZESS Normalized: linzess |
Drug | ABBVIE INC. | $179.17 | 8 | 2025 |
Source payment records
|
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| VEGZELMA Normalized: vegzelma |
Biological | Celltrion USA Inc. | $178.50 | 8 | 2025 |
Source payment records
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| Biktarvy Normalized: biktarvy |
Drug | Gilead Sciences, Inc. | $137.63 | 5 | 2025 |
Source payment records
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| Wegovy Normalized: wegovy |
Drug | Novo Nordisk Inc | $97.85 | 5 | 2025 |
Source payment records
|
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| APRETUDE Normalized: apretude |
Drug | ViiV Healthcare Company | $94.17 | 3 | 2025 |
Source payment records
|
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| DUPIXENT Normalized: dupixent |
Biological | GENZYME CORPORATION, Regeneron Healthcare Solutions, Inc. | $67.39 | 2 | 2025 |
Source payment records
|
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| FARXIGA Normalized: farxiga |
Drug | AstraZeneca Pharmaceuticals LP | $65.31 | 4 | 2025 |
Source payment records
|
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| TREMFYA Normalized: tremfya |
Drug | Janssen Biotech, Inc. | $61.79 | 2 | 2025 |
Source payment records
|
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| Cologuard Collection Kit Normalized: cologuard collection kit |
Device | Exact Sciences Corporation | $45.44 | 2 | 2025 |
Source payment records
|
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| OMVOH Normalized: omvoh |
Drug | Lilly USA, LLC | $42.55 | 2 | 2025 |
Source payment records
|
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| GLYCATE Normalized: glycate |
Drug | Intra-Sana Laboratories | $35.47 | 2 | 2025 |
Source payment records
|
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| RELTONE 200 MG Normalized: reltone 200 mg |
Drug | Intra-Sana Laboratories | $35.47 | 2 | 2025 |
Source payment records
|
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| RELTONE 400 MG Normalized: reltone 400 mg |
Drug | Intra-Sana Laboratories | $35.47 | 2 | 2025 |
Source payment records
|
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| PIFELTRO Normalized: pifeltro |
Drug | Merck Sharp & Dohme LLC | $29.19 | 1 | 2025 |
Source payment records
|
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| VOQUEZNA Normalized: voquezna |
Drug | Phathom Pharmaceuticals, Inc. | $25.99 | 2 | 2025 |
Source payment records
|
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| QSYMIA Normalized: qsymia |
Drug | VIVUS LLC | $25.62 | 1 | 2025 |
Source payment records
|
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| MAVYRET Normalized: mavyret |
Drug | ABBVIE INC. | $24.50 | 1 | 2025 |
Source payment records
|
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| BREZTRI Normalized: breztri |
Drug | AstraZeneca Pharmaceuticals LP | $24.23 | 1 | 2025 |
Source payment records
|
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| OCALIVA Normalized: ocaliva |
Drug | Intercept Pharmaceuticals, Inc. | $21.05 | 1 | 2025 |
Source payment records
|
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| VELSIPITY Normalized: velsipity |
Drug | PFIZER INC. | $20.79 | 1 | 2025 |
Source payment records
|
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| Vivotif Normalized: vivotif |
Drug | Bavarian Nordic A/S | $18.32 | 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 |
|---|---|---|---|---|---|---|
| Biktarvy biktarvy |
2025 | Biktarvy | 2024 | 16 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| DOVATO dovato |
2025 | Dovato | 2024 | 11 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| LINZESS linzess |
2025 | Linzess | 2024 | 23 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| RINVOQ rinvoq |
2025 | Rinvoq | 2024 | 15 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| XIFAXAN xifaxan |
2025 | Xifaxan | 2024 | 11 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 |
|---|---|---|---|---|---|---|
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | LINZESS open payments reported associated product |
CMS Open Payments — General Payments 87954 supporting records · 21815 recipient NPIs · example record 1201352608 |
Linzess · 2024 Exact normalized brand match · 1 Part D row |
23 | suppressed by CMS |
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | QULIPTA open payments reported associated product |
CMS Open Payments — General Payments 298617 supporting records · 58957 recipient NPIs · example record 1201352530 |
Qulipta · 2024 Exact normalized brand match · 1 Part D row |
11 | suppressed by CMS |
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | RINVOQ open payments reported associated product |
CMS Open Payments — General Payments 279238 supporting records · 34343 recipient NPIs · example record 1201352600 |
Rinvoq · 2024 Exact normalized brand match · 1 Part D row |
15 | suppressed by CMS |
| Gilead Sciences, Inc. Exact reporting entity; no affiliate inference |
2025 | Biktarvy open payments reported associated product |
CMS Open Payments — General Payments 8065 supporting records · 2759 recipient NPIs · example record 1234350766 |
Biktarvy · 2024 Exact normalized brand match · 1 Part D row |
16 | suppressed by CMS |
| Lilly USA, LLC Exact reporting entity; no affiliate inference |
2025 | JARDIANCE open payments reported associated product |
CMS Open Payments — General Payments 47708 supporting records · 23833 recipient NPIs · example record 1186464557 |
Jardiance · 2024 Exact normalized brand match · 1 Part D row |
15 | suppressed by CMS |
| Novo Nordisk Inc Exact reporting entity; no affiliate inference |
2025 | Ozempic open payments reported associated product |
CMS Open Payments — General Payments 261625 supporting records · 77793 recipient NPIs · example record 1188130076 |
Ozempic · 2024 Exact normalized brand match · 1 Part D row |
22 | suppressed by CMS |
| 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 |
25 | suppressed by CMS |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC Exact reporting entity; no affiliate inference |
2025 | XIFAXAN open payments reported associated product |
CMS Open Payments — General Payments 101901 supporting records · 33018 recipient NPIs · example record 1231775337 |
Xifaxan · 2024 Exact normalized brand match · 1 Part D row |
11 | suppressed by CMS |
| Takeda Pharmaceuticals U.S.A., Inc. Exact reporting entity; no affiliate inference |
2025 | GATTEX open payments reported associated product |
CMS Open Payments — General Payments 5737 supporting records · 3682 recipient NPIs · example record 1223616328 |
Gattex · 2024 Exact normalized brand match · 1 Part D row |
14 | suppressed by CMS |
| ViiV Healthcare Company Exact reporting entity; no affiliate inference |
2025 | DOVATO open payments reported associated product |
CMS Open Payments — General Payments 18732 supporting records · 3540 recipient NPIs · example record 1189508902 |
Dovato · 2024 Exact normalized brand match · 1 Part D row |
11 | 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 |
|---|---|---|---|
| Pantoprazole Sodium | Pantoprazole Sodium | 191 | 56 |
| Amlodipine Besylate | Amlodipine Besylate | 121 | 41 |
| Metformin Hcl | Metformin Hcl | 103 | 27 |
| Atorvastatin Calcium | Atorvastatin Calcium | 85 | 29 |
| Famotidine | Famotidine | 75 | 30 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 75 | 24 |
| Losartan Potassium | Losartan Potassium | 67 | 23 |
| Levothyroxine Sodium | Levothyroxine Sodium | 61 | 16 |
| Alprazolam | Alprazolam | 56 | 23 |
| Tamsulosin Hcl | Tamsulosin Hcl | 54 | 16 |
| Metoprolol Succinate | Metoprolol Succinate | 50 | 19 |
| Zolpidem Tartrate | Zolpidem Tartrate | 50 | 16 |
| Mesalamine Er | Mesalamine | 41 | suppressed |
| Azithromycin | Azithromycin | 37 | 30 |
| Lisinopril | Lisinopril | 37 | suppressed |
| Allopurinol | Allopurinol | 35 | 12 |
| Meloxicam | Meloxicam | 34 | 15 |
| Omeprazole | Omeprazole | 34 | 13 |
| Oxycodone Hcl | Oxycodone Hcl | 33 | suppressed |
| Tramadol Hcl | Tramadol Hcl | 33 | 12 |
| Clonazepam | Clonazepam | 32 | suppressed |
| Sod Sulf-Potass Sulf-Mag Sulf | Sodium, Potassium,mag Sulfates | 32 | 31 |
| Gabapentin | Gabapentin | 31 | 11 |
| Mesalamine | Mesalamine | 31 | suppressed |
| Gavilyte-G | Peg3350/Sod Sulf,bicarb,cl/Kcl | 29 | 28 |
| Eliquis | Apixaban | 25 | suppressed |
| Prednisone | Prednisone | 25 | 12 |
| Clenpiq | Sod Picosulf/Mag Ox/Citric Ac | 23 | 20 |
| Linzess | Linaclotide | 23 | suppressed |
| Ozempic | Semaglutide | 22 | suppressed |
| Ciprofloxacin Hcl | Ciprofloxacin Hcl | 21 | 16 |
| Diazepam | Diazepam | 21 | suppressed |
| Esomeprazole Magnesium | Esomeprazole Magnesium | 21 | suppressed |
| Hydrochlorothiazide | Hydrochlorothiazide | 21 | suppressed |
| Albuterol Sulfate Hfa | Albuterol Sulfate | 20 | suppressed |
| Diphenoxylate-Atropine | Diphenoxylate Hcl/Atropine | 20 | suppressed |
| Finasteride | Finasteride | 20 | suppressed |
| Fluconazole | Fluconazole | 20 | suppressed |
| Propranolol Hcl | Propranolol Hcl | 20 | suppressed |
| Simvastatin | Simvastatin | 20 | suppressed |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 19 | 14 |
| Atenolol | Atenolol | 19 | suppressed |
| Furosemide | Furosemide | 19 | suppressed |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 18 | suppressed |
| Montelukast Sodium | Montelukast Sodium | 18 | suppressed |
| Fenofibrate | Fenofibrate Nanocrystallized | 17 | suppressed |
| Folic Acid | Folic Acid | 17 | suppressed |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 17 | suppressed |
| Biktarvy | Bictegrav/Emtricit/Tenofov Ala | 16 | suppressed |
| Butalbital-Acetaminophen-Caffe | Butalb/Acetaminophen/Caffeine | 16 | suppressed |
| Escitalopram Oxalate | Escitalopram Oxalate | 16 | suppressed |
| Lorazepam | Lorazepam | 16 | suppressed |
| Metoclopramide Hcl | Metoclopramide Hcl | 16 | suppressed |
| Metronidazole | Metronidazole | 16 | suppressed |
| Potassium Chloride | Potassium Chloride | 16 | suppressed |
| Trazodone Hcl | Trazodone Hcl | 16 | suppressed |
| Cefpodoxime Proxetil | Cefpodoxime Proxetil | 15 | 11 |
| Cefuroxime | Cefuroxime Axetil | 15 | 12 |
| Jardiance | Empagliflozin | 15 | suppressed |
| Ketoconazole | Ketoconazole | 15 | suppressed |
| Meclizine Hcl | Meclizine Hcl | 15 | suppressed |
| Rinvoq | Upadacitinib | 15 | suppressed |
| Acyclovir | Acyclovir | 14 | suppressed |
| Doxazosin Mesylate | Doxazosin Mesylate | 14 | suppressed |
| Gattex | Teduglutide | 14 | suppressed |
| Hydrocortisone | Hydrocortisone | 14 | suppressed |
| Loperamide | Loperamide Hcl | 14 | suppressed |
| Losartan-Hydrochlorothiazide | Losartan/Hydrochlorothiazide | 12 | suppressed |
| Zaleplon | Zaleplon | 12 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 11 | suppressed |
| Donepezil Hcl | Donepezil Hcl | 11 | suppressed |
| Dovato | Dolutegravir Sodium/Lamivudine | 11 | suppressed |
| Fluticasone Propionate | Fluticasone Propionate | 11 | suppressed |
| Glimepiride | Glimepiride | 11 | suppressed |
| Lactulose | Lactulose | 11 | suppressed |
| Levofloxacin | Levofloxacin | 11 | suppressed |
| Qulipta | Atogepant | 11 | suppressed |
| Sulfasalazine | Sulfasalazine | 11 | suppressed |
| Xifaxan | Rifaximin | 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 | $3,270.79 · 146 records | ABBVIE INC. | APRETUDE, BREZTRI, Biktarvy, CREON, Cologuard Collection Kit, DOVATO, DUPIXENT, ENTYVIO, FARXIGA, GLYCATE, IBSRELA, LINZESS, MAVYRET, OCALIVA, OMVOH, PIFELTRO, QSYMIA, RELTONE 200 MG, RELTONE 400 MG, RINVOQ, SKYRIZI, Sucraid, TREMFYA, VEGZELMA, VELSIPITY, VOQUEZNA, Vivotif, Wegovy, XIFAXAN | 10 | — |
| 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