Payment overview · 2025
General Payments
327 reported records · 35 companies
Healthcare provider profile · identity verified
Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neurology · ORLANDO, FL · NPI 1225051170
Verified facts
CMS Open Payments records show Amparo Gutierrez, MD received $147,489.95 in general payments during 2025 across 327 reported records.
EMD Serono, Inc. accounted for 34.4% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 42 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Mavenclad, Qulipta, Ubrelvy, Vumerity.
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 31 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 UBRELVY as an associated drug or biological on 299803 records involving 61203 distinct recipient NPIs. Public Medicare Part D data also shows 19 claims for Ubrelvy by this doctor in 2024.
Biogen, 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 TECFIDERA as an associated drug or biological on 28 records involving 22 distinct recipient NPIs. Public Medicare Part D data also shows 17 claims for Tecfidera by this doctor in 2024.
Biogen, 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 VUMERITY as an associated drug or biological on 16193 records involving 4044 distinct recipient NPIs. Public Medicare Part D data also shows 104 claims for Vumerity by this doctor in 2024.
EMD Serono, 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 Mavenclad as an associated drug or biological on 3542 records involving 766 distinct recipient NPIs. Public Medicare Part D data also shows 29 claims for Mavenclad by this doctor in 2024.
Otsuka America Pharmaceutical, 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 NUEDEXTA as an associated drug or biological on 393 records involving 285 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Nuedexta by this doctor in 2024.
These records do not establish that a payment influenced prescribing or medical care.
Payment overview · 2025
327 reported records · 35 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 |
|---|---|---|---|---|---|
| EMD Serono, Inc. | Unresolved — no canonical attribution shown | $50,775.51 | 34.4% | 37 | 2025 |
| Biogen, Inc. | Unresolved — no canonical attribution shown | $31,215.32 | 21.2% | 45 | 2025 |
| TG Therapeutics, Inc. | Unresolved — no canonical attribution shown | $29,014.20 | 19.7% | 29 | 2025 |
| Ares Trading SA | Unresolved — no canonical attribution shown | $21,393.42 | 14.5% | 5 | 2025 |
| E.R. Squibb & Sons, L.L.C. | Unresolved — no canonical attribution shown | $7,663.21 | 5.2% | 6 | 2025 |
| Novartis Pharmaceuticals Corporation | Unresolved — no canonical attribution shown | $3,938.40 | 2.7% | 45 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $607.05 | 0.4% | 17 | 2025 |
| ABBVIE INC. | Unresolved — no canonical attribution shown | $414.80 | 0.3% | 19 | 2025 |
| Alexion Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $387.46 | 0.3% | 7 | 2025 |
| Genentech USA, Inc. | Unresolved — no canonical attribution shown | $331.50 | 0.2% | 22 | 2025 |
| Celgene Corporation | Unresolved — no canonical attribution shown | $284.21 | 0.2% | 27 | 2025 |
| ARGENX US, INC. | Unresolved — no canonical attribution shown | $214.17 | 0.1% | 4 | 2025 |
| Vanda Pharmaceuticals Inc. | Unresolved — no canonical attribution shown | $139.98 | 0.1% | 14 | 2025 |
| ACADIA Pharmaceuticals Inc | Unresolved — no canonical attribution shown | $137.43 | 0.1% | 7 | 2025 |
| UCB, Inc. | Unresolved — no canonical attribution shown | $124.06 | 0.1% | 5 | 2025 |
| GENZYME CORPORATION | Unresolved — no canonical attribution shown | $85.72 | 0.1% | 4 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $82.37 | 0.1% | 4 | 2025 |
| CSL Behring | Unresolved — no canonical attribution shown | $75.97 | 0.1% | 3 | 2025 |
| Lundbeck LLC | Unresolved — no canonical attribution shown | $75.85 | 0.1% | 3 | 2025 |
| Genentech, Inc. | Unresolved — no canonical attribution shown | $69.11 | 0.1% | 1 | 2025 |
| CATALYST PHARMACEUTICALS, INC. | Unresolved — no canonical attribution shown | $67.42 | 0.1% | 3 | 2025 |
| Takeda Pharmaceuticals U.S.A., Inc. | Unresolved — no canonical attribution shown | $61.23 | 0.0% | 2 | 2025 |
| Teva Pharmaceuticals USA, Inc. | Unresolved — no canonical attribution shown | $43.12 | 0.0% | 2 | 2025 |
| SK Life Science, Inc. |
SK Life Science, Inc. exact · evidence 2025-04-03 |
$42.99 | 0.0% | 2 | 2025 |
| Neurelis, Inc. |
Neurelis, Inc. exact · evidence 2025-02-20 |
$35.02 | 0.0% | 2 | 2025 |
| Tanabe Pharma America, Inc. | Unresolved — no canonical attribution shown | $29.99 | 0.0% | 2 | 2025 |
| Cycle Pharmaceuticals Inc | Unresolved — no canonical attribution shown | $27.79 | 0.0% | 2 | 2025 |
| AstraZeneca Pharmaceuticals LP | Unresolved — no canonical attribution shown | $24.65 | 0.0% | 1 | 2025 |
| Neurocrine BioSciences, Inc. | Unresolved — no canonical attribution shown | $20.62 | 0.0% | 1 | 2025 |
| LivaNova USA, Inc. | Unresolved — no canonical attribution shown | $20.48 | 0.0% | 1 | 2025 |
| Otsuka America Pharmaceutical, Inc. | Unresolved — no canonical attribution shown | $19.68 | 0.0% | 1 | 2025 |
| Janssen Pharmaceuticals, Inc | Unresolved — no canonical attribution shown | $17.90 | 0.0% | 1 | 2025 |
| Axsome Therapeutics, Inc. | Unresolved — no canonical attribution shown | $17.00 | 0.0% | 1 | 2025 |
| Janssen Biotech, Inc. | Unresolved — no canonical attribution shown | $16.86 | 0.0% | 1 | 2025 |
| Lilly USA, LLC | Unresolved — no canonical attribution shown | $15.46 | 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 | $108,614.50 | 38 |
| Consulting Fee | $21,874.00 | 5 |
| Travel and Lodging | $9,103.94 | 5 |
| Food and Beverage | $7,850.98 | 277 |
| Education | $46.53 | 2 |
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 |
|---|---|---|---|---|---|
| Mavenclad Normalized: mavenclad |
Drug | EMD Serono, Inc. | $49,415.95 | 14 | 2025 |
Source payment records
|
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| BRIUMVI Normalized: briumvi |
Drug | TG Therapeutics, Inc. | $29,014.20 | 29 | 2025 |
Source payment records
|
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| VUMERITY Normalized: vumerity |
Drug | Biogen, Inc. | $26,040.28 | 27 | 2025 |
Source payment records
|
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| ZEPOSIA Normalized: zeposia |
Drug | Celgene Corporation, E.R. Squibb & Sons, L.L.C. | $7,947.42 | 33 | 2025 |
Source payment records
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| TYSABRI Normalized: tysabri |
Biological | Biogen, Inc. | $4,850.42 | 19 | 2025 |
Source payment records
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| KESIMPTA Normalized: kesimpta |
Drug | Novartis Pharmaceuticals Corporation | $3,468.00 | 43 | 2025 |
Source payment records
|
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| UPLIZNA Normalized: uplizna |
Biological | Amgen Inc. | $436.99 | 15 | 2025 |
Source payment records
|
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| ULTOMIRIS Normalized: ultomiris |
Biological | Alexion Pharmaceuticals, Inc. | $247.31 | 5 | 2025 |
Source payment records
|
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| QULIPTA Normalized: qulipta |
Drug | ABBVIE INC. | $232.74 | 12 | 2025 |
Source payment records
|
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| BOTOX Normalized: botox |
Biological | ABBVIE INC. | $188.19 | 6 | 2025 |
Source payment records
|
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| Ocrevus Zunovo Normalized: ocrevus zunovo |
Biological | Genentech USA, Inc. | $178.18 | 18 | 2025 |
Source payment records
|
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| UBRELVY Normalized: ubrelvy |
Drug | ABBVIE INC. | $173.94 | 10 | 2025 |
Source payment records
|
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| PONVORY Normalized: ponvory |
Drug | Vanda Pharmaceuticals Inc. | $139.98 | 14 | 2025 |
Source payment records
|
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| Ocrevus Normalized: ocrevus |
Biological | Genentech USA, Inc., Genentech, Inc. | $123.00 | 5 | 2025 |
Source payment records
|
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| NUPLAZID Normalized: nuplazid |
Drug | ACADIA Pharmaceuticals Inc | $117.96 | 6 | 2025 |
Source payment records
|
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| VYVGART HYTRULO Normalized: vyvgart hytrulo |
Drug | ARGENX US, INC. | $114.17 | 3 | 2025 |
Source payment records
|
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| VYVGART Normalized: vyvgart |
Drug | ARGENX US, INC. | $100.00 | 1 | 2025 |
Source payment records
|
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| SPINRAZA Normalized: spinraza |
Biological | Biogen, Inc. | $88.03 | 4 | 2025 |
Source payment records
|
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| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $82.37 | 4 | 2025 |
Source payment records
|
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| ZAVZPRET Normalized: zavzpret |
Drug | PFIZER INC. | $82.37 | 4 | 2025 |
Source payment records
|
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| Hizentra Normalized: hizentra |
Biological | CSL Behring | $75.97 | 3 | 2025 |
Source payment records
|
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| VYEPTI Normalized: vyepti |
Biological | Lundbeck LLC | $75.85 | 3 | 2025 |
Source payment records
|
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| Fintepla Normalized: fintepla |
Drug | UCB, Inc. | $72.08 | 3 | 2025 |
Source payment records
|
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| SKYCLARYS Normalized: skyclarys |
Drug | Biogen, Inc. | $70.83 | 4 | 2025 |
Source payment records
|
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| HYQVIA Normalized: hyqvia |
Biological | Takeda Pharmaceuticals U.S.A., Inc. | $61.23 | 2 | 2025 |
Source payment records
|
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| VYALEV Normalized: vyalev |
Drug | ABBVIE INC. | $52.67 | 3 | 2025 |
Source payment records
|
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| AUSTEDO XR Normalized: austedo xr |
Drug | Teva Pharmaceuticals USA, Inc. | $43.12 | 2 | 2025 |
Source payment records
|
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| FYCOMPA Normalized: fycompa |
Drug | CATALYST PHARMACEUTICALS, INC. | $37.66 | 2 | 2025 |
Source payment records
|
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| VALTOCO Normalized: valtoco |
Drug | Neurelis, Inc. | $35.02 | 2 | 2025 |
Source payment records
|
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| Nayzilam Normalized: nayzilam |
Drug | UCB, Inc. | $30.78 | 1 | 2025 |
Source payment records
|
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| Radicava Normalized: radicava |
Drug | Tanabe Pharma America, Inc. | $29.99 | 2 | 2025 |
Source payment records
|
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| FIRDAPSE Normalized: firdapse |
Drug | CATALYST PHARMACEUTICALS, INC. | $29.76 | 1 | 2025 |
Source payment records
|
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| Bafiertam Normalized: bafiertam |
Drug | Cycle Pharmaceuticals Inc | $27.79 | 2 | 2025 |
Source payment records
|
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| Tascenso ODT Normalized: tascenso odt |
Drug | Cycle Pharmaceuticals Inc | $27.79 | 2 | 2025 |
Source payment records
|
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| WAINUA Normalized: wainua |
Drug | AstraZeneca Pharmaceuticals LP | $24.65 | 1 | 2025 |
Source payment records
|
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| Briviact Normalized: briviact |
Drug | UCB, Inc. | $21.20 | 1 | 2025 |
Source payment records
|
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| INGREZZA Normalized: ingrezza |
Drug | Neurocrine BioSciences, Inc. | $20.62 | 1 | 2025 |
Source payment records
|
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| VNS THERAPY SENTIVA MODEL 1000 GENERATOR Normalized: vns therapy sentiva model 1000 generator |
Device | LivaNova USA, Inc. | $20.48 | 1 | 2025 |
Source payment records
|
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| REXULTI Normalized: rexulti |
Drug | Otsuka America Pharmaceutical, Inc. | $19.68 | 1 | 2025 |
Source payment records
|
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| DAYBUE Normalized: daybue |
Drug | ACADIA Pharmaceuticals Inc | $19.47 | 1 | 2025 |
Source payment records
|
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| Sunosi Normalized: sunosi |
Drug | Axsome Therapeutics, Inc. | $17.00 | 1 | 2025 |
Source payment records
|
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| EMGALITY Normalized: emgality |
Drug | Lilly USA, LLC | $15.46 | 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 |
|---|---|---|---|---|---|---|
| Mavenclad mavenclad |
2025 | Mavenclad | 2024 | 29 | exact normalized | Medicare Part D |
| QULIPTA qulipta |
2025 | Qulipta | 2024 | 31 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| UBRELVY ubrelvy |
2025 | Ubrelvy | 2024 | 19 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| VUMERITY vumerity |
2025 | Vumerity | 2024 | 104 | 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 | 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 |
31 | suppressed by CMS |
| ABBVIE INC. Exact reporting entity; no affiliate inference |
2025 | UBRELVY open payments reported associated product |
CMS Open Payments — General Payments 299803 supporting records · 61203 recipient NPIs · example record 1201352530 |
Ubrelvy · 2024 Exact normalized brand match · 1 Part D row |
19 | suppressed by CMS |
| Biogen, Inc. Exact reporting entity; no affiliate inference |
2025 | TECFIDERA open payments reported associated product |
CMS Open Payments — General Payments 28 supporting records · 22 recipient NPIs · example record 1208304358 |
Tecfidera · 2024 Exact normalized brand match · 1 Part D row |
17 | suppressed by CMS |
| Biogen, Inc. Exact reporting entity; no affiliate inference |
2025 | VUMERITY open payments reported associated product |
CMS Open Payments — General Payments 16193 supporting records · 4044 recipient NPIs · example record 1208299697 |
Vumerity · 2024 Exact normalized brand match · 1 Part D row |
104 | 12 |
| EMD Serono, Inc. Exact reporting entity; no affiliate inference |
2025 | Mavenclad open payments reported associated product |
CMS Open Payments — General Payments 3542 supporting records · 766 recipient NPIs · example record 1236867010 |
Mavenclad · 2024 Exact normalized brand match · 1 Part D row |
29 | 16 |
| Otsuka America Pharmaceutical, Inc. Exact reporting entity; no affiliate inference |
2025 | NUEDEXTA open payments reported associated product |
CMS Open Payments — General Payments 393 supporting records · 285 recipient NPIs · example record 1227268901 |
Nuedexta · 2024 Exact normalized brand match · 1 Part D row |
24 | 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 |
|---|---|---|---|
| Gabapentin | Gabapentin | 438 | 121 |
| Baclofen | Baclofen | 332 | 107 |
| Duloxetine Hcl | Duloxetine Hcl | 163 | 46 |
| Dalfampridine Er | Dalfampridine | 141 | 28 |
| Tizanidine Hcl | Tizanidine Hcl | 130 | 45 |
| Zolpidem Tartrate | Zolpidem Tartrate | 122 | 14 |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 108 | 21 |
| Topiramate | Topiramate | 108 | 25 |
| Vumerity | Diroximel Fumarate | 104 | 12 |
| Kesimpta Pen | Ofatumumab | 97 | 14 |
| Modafinil | Modafinil | 84 | 18 |
| Sumatriptan Succinate | Sumatriptan Succinate | 76 | 22 |
| Levetiracetam | Levetiracetam | 65 | 21 |
| Trazodone Hcl | Trazodone Hcl | 58 | 19 |
| Escitalopram Oxalate | Escitalopram Oxalate | 57 | 17 |
| Oxybutynin Chloride Er | Oxybutynin Chloride | 56 | 21 |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 54 | 16 |
| Pregabalin | Pregabalin | 54 | 15 |
| Amitriptyline Hcl | Amitriptyline Hcl | 50 | 14 |
| Amantadine | Amantadine Hcl | 47 | 12 |
| Fluoxetine Hcl | Fluoxetine Hcl | 46 | suppressed |
| Teriflunomide | Teriflunomide | 45 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 45 | 13 |
| Prednisone | Prednisone | 42 | suppressed |
| Nortriptyline Hcl | Nortriptyline Hcl | 41 | 12 |
| Doxepin Hcl | Doxepin Hcl | 40 | 11 |
| Hydroxyzine Hcl | Hydroxyzine Hcl | 38 | 11 |
| Vitamin D2 | Ergocalciferol (Vitamin D2) | 35 | 12 |
| Carbamazepine | Carbamazepine | 34 | 11 |
| Alprazolam | Alprazolam | 33 | 17 |
| Carbamazepine Er | Carbamazepine | 33 | suppressed |
| Buspirone Hcl | Buspirone Hcl | 31 | suppressed |
| Qulipta | Atogepant | 31 | suppressed |
| Myrbetriq | Mirabegron | 30 | suppressed |
| Mavenclad | Cladribine | 29 | 16 |
| Sertraline Hcl | Sertraline Hcl | 29 | suppressed |
| Methylphenidate Hcl | Methylphenidate Hcl | 26 | suppressed |
| Nuedexta | Dextromethorphan Hbr/Quinidine | 24 | suppressed |
| Rizatriptan | Rizatriptan Benzoate | 24 | suppressed |
| Bupropion Hcl | Bupropion Hcl | 22 | suppressed |
| Donepezil Hcl | Donepezil Hcl | 21 | suppressed |
| Diazepam | Diazepam | 20 | suppressed |
| Meloxicam | Meloxicam | 20 | suppressed |
| Solifenacin Succinate | Solifenacin Succinate | 20 | suppressed |
| Bupropion Xl | Bupropion Hcl | 19 | suppressed |
| Riluzole | Riluzole | 19 | suppressed |
| Ubrelvy | Ubrogepant | 19 | suppressed |
| Primidone | Primidone | 18 | suppressed |
| Aimovig Autoinjector | Erenumab-Aooe | 17 | suppressed |
| Tecfidera | Dimethyl Fumarate | 17 | suppressed |
| Methylphenidate Er | Methylphenidate Hcl | 16 | suppressed |
| Naproxen | Naproxen | 16 | suppressed |
| Citalopram Hbr | Citalopram Hydrobromide | 14 | suppressed |
| Propranolol Hcl Er | Propranolol Hcl | 14 | suppressed |
| Avonex (4 Pack) | Interferon Beta-1a | 13 | suppressed |
| Lorazepam | Lorazepam | 13 | suppressed |
| Memantine Hcl | Memantine Hcl | 13 | suppressed |
| Methocarbamol | Methocarbamol | 13 | suppressed |
| Mycophenolate Mofetil | Mycophenolate Mofetil | 13 | suppressed |
| Carisoprodol | Carisoprodol | 12 | suppressed |
| Dilantin | Phenytoin Sodium Extended | 12 | suppressed |
| Emgality Pen | Galcanezumab-Gnlm | 12 | suppressed |
| Phenobarbital | Phenobarbital | 12 | suppressed |
| Pramipexole Dihydrochloride | Pramipexole Di-Hcl | 12 | suppressed |
| Atorvastatin Calcium | Atorvastatin Calcium | 11 | suppressed |
| Clonazepam | Clonazepam | 11 | suppressed |
| Hydrochlorothiazide | Hydrochlorothiazide | 11 | suppressed |
| Ropinirole Hcl | Ropinirole Hcl | 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 | $147,489.95 · 327 records | EMD Serono, Inc. | AUSTEDO XR, BOTOX, BRIUMVI, Bafiertam, Briviact, DAYBUE, EMGALITY, FIRDAPSE, FYCOMPA, Fintepla, HYQVIA, Hizentra, INGREZZA, KESIMPTA, Mavenclad, NUPLAZID, NURTEC ODT, Nayzilam, Ocrevus, Ocrevus Zunovo, PONVORY, QULIPTA, REXULTI, Radicava, SKYCLARYS, SPINRAZA, Sunosi, TYSABRI, Tascenso ODT, UBRELVY, ULTOMIRIS, UPLIZNA, VALTOCO, VNS THERAPY SENTIVA MODEL 1000 GENERATOR, VUMERITY, VYALEV, VYEPTI, VYVGART, VYVGART HYTRULO, WAINUA, ZAVZPRET, ZEPOSIA | 6 | — |
| 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