Payment overview · 2025
General Payments
$24,814.01
47 reported records · 5 companies
Healthcare provider profile · identity verified
Riley J Snook, MD
Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Neurology · CARMEL, IN · NPI 1407854045
Verified facts
What the public records show
CMS Open Payments records show Riley J Snook, MD received $24,814.01 in general payments during 2025 across 47 reported records.
Alexion Pharmaceuticals, Inc. accounted for 44.3% of that reported general-payment amount.
The Open Payments records used for this analysis explicitly named 10 associated products.
A separate comparison found the same explicitly named product in public Medicare Part D data: Gammaked, Nurtec Odt, Ultomiris.
ARGENX 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 VYVGART as an associated drug or biological on 6851 records involving 2825 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Vyvgart by this doctor in 2024.
Alexion 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 ULTOMIRIS as an associated drug or biological on 24281 records involving 10608 distinct recipient NPIs. Public Medicare Part D data also shows 19 claims for Ultomiris by this doctor in 2024.
Kedrion Biopharma, 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 GAMMAKED as an associated drug or biological on 761 records involving 541 distinct recipient NPIs. Public Medicare Part D data also shows 172 claims for Gammaked 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.
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 12 claims for Nurtec Odt 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 PANZYGA as an associated drug or biological on 8346 records involving 3334 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Panzyga 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 |
|---|---|---|---|---|---|
| Alexion Pharmaceuticals, Inc. | Unresolved — no canonical attribution shown | $10,999.49 | 44.3% | 23 | 2025 |
| Amgen Inc. | Unresolved — no canonical attribution shown | $10,562.31 | 42.6% | 14 | 2025 |
| ARGENX US, INC. | Unresolved — no canonical attribution shown | $3,218.98 | 13.0% | 8 | 2025 |
| PFIZER INC. | Unresolved — no canonical attribution shown | $17.68 | 0.1% | 1 | 2025 |
| Kedrion Biopharma, Inc. | Unresolved — no canonical attribution shown | $15.55 | 0.1% | 1 | 2025 |
What were the payments for?
Payment categories
| Category | Amount | Records |
|---|---|---|
| Consulting Fee | $19,507.50 | 9 |
| Travel and Lodging | $2,583.85 | 12 |
| Food and Beverage | $1,773.66 | 25 |
| Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program | $949.00 | 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 |
|---|---|---|---|---|---|
| ULTOMIRIS Normalized: ultomiris |
Biological | Alexion Pharmaceuticals, Inc. | $10,843.23 | 20 | 2025 |
Source payment records
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| UPLIZNA Normalized: uplizna |
Biological | Amgen Inc. | $10,562.31 | 14 | 2025 |
Source payment records
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| VYVGART HYTRULO Normalized: vyvgart hytrulo |
Drug | ARGENX US, INC. | $3,218.98 | 8 | 2025 |
Source payment records
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| NURTEC ODT Normalized: nurtec odt |
Drug | PFIZER INC. | $17.68 | 1 | 2025 |
Source payment records
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| ZAVZPRET Normalized: zavzpret |
Drug | PFIZER INC. | $17.68 | 1 | 2025 |
Source payment records
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| Albuked Normalized: albuked |
Biological | Kedrion Biopharma, Inc. | $15.55 | 1 | 2025 |
Source payment records
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| GAMMAKED Normalized: gammaked |
Biological | Kedrion Biopharma, Inc. | $15.55 | 1 | 2025 |
Source payment records
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| KEDRAB Normalized: kedrab |
Biological | Kedrion Biopharma, Inc. | $15.55 | 1 | 2025 |
Source payment records
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| KOATE Normalized: koate |
Biological | Kedrion Biopharma, Inc. | $15.55 | 1 | 2025 |
Source payment records
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| RhoGAM Ultra-Filtered PLUS Normalized: rhogam ultra filtered plus |
Biological | Kedrion Biopharma, Inc. | $15.55 | 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 |
|---|---|---|---|---|---|---|
| GAMMAKED gammaked |
2025 | Gammaked | 2024 | 172 | exact normalized | Medicare Part D |
| NURTEC ODT nurtec odt |
2025 | Nurtec Odt | 2024 | 12 Beneficiary count suppressed |
exact normalized | Medicare Part D |
| ULTOMIRIS ultomiris |
2025 | Ultomiris | 2024 | 19 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 |
|---|---|---|---|---|---|---|
| ARGENX US, INC. Exact reporting entity; no affiliate inference |
2025 | VYVGART open payments reported associated product |
CMS Open Payments — General Payments 6851 supporting records · 2825 recipient NPIs · example record 1240416066 |
Vyvgart · 2024 Exact normalized brand match · 1 Part D row |
13 | suppressed by CMS |
| Alexion Pharmaceuticals, Inc. Exact reporting entity; no affiliate inference |
2025 | ULTOMIRIS open payments reported associated product |
CMS Open Payments — General Payments 24281 supporting records · 10608 recipient NPIs · example record 1202912926 |
Ultomiris · 2024 Exact normalized brand match · 1 Part D row |
19 | suppressed by CMS |
| Kedrion Biopharma, Inc. Exact reporting entity; no affiliate inference |
2025 | GAMMAKED open payments reported associated product |
CMS Open Payments — General Payments 761 supporting records · 541 recipient NPIs · example record 1206766586 |
Gammaked · 2024 Exact normalized brand match · 1 Part D row |
172 | 14 |
| 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 |
| 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 |
12 | suppressed by CMS |
| PFIZER INC. Exact reporting entity; no affiliate inference |
2025 | PANZYGA open payments reported associated product |
CMS Open Payments — General Payments 8346 supporting records · 3334 recipient NPIs · example record 1228795271 |
Panzyga · 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
Provider-and-drug rows loaded for 2024
| Brand | Generic | Claims | Beneficiaries |
|---|---|---|---|
| Gammaked | Immune Globul G/Gly/Iga Avg 46 | 172 | 14 |
| Pregabalin | Pregabalin | 172 | 37 |
| Donepezil Hcl | Donepezil Hcl | 165 | 48 |
| Clonazepam | Clonazepam | 149 | 31 |
| Gabapentin | Gabapentin | 139 | 42 |
| Carbidopa-Levodopa | Carbidopa/Levodopa | 135 | 40 |
| Sodium Chloride | 0.9 % Sodium Chloride | 115 | 24 |
| Gammagard Liquid | Immun Glob G(Igg)/Gly/Iga Ov50 | 112 | suppressed |
| Gamunex-C | Immune Globul G/Gly/Iga Avg 46 | 111 | suppressed |
| Lamotrigine | Lamotrigine | 106 | 26 |
| Privigen | Immun Glob G(Igg)/Pro/Iga 0-50 | 102 | suppressed |
| Baclofen | Baclofen | 95 | 24 |
| Emgality Pen | Galcanezumab-Gnlm | 93 | suppressed |
| Rizatriptan | Rizatriptan Benzoate | 81 | 15 |
| Gammaplex | Immun Glob G(Igg)/Gly/Iga 0-50 | 80 | suppressed |
| Tizanidine Hcl | Tizanidine Hcl | 80 | 21 |
| Duloxetine Hcl | Duloxetine Hcl | 77 | 19 |
| Topiramate | Topiramate | 75 | 19 |
| Nortriptyline Hcl | Nortriptyline Hcl | 74 | 18 |
| Carbidopa-Levodopa Er | Carbidopa/Levodopa | 72 | 25 |
| Aimovig Autoinjector | Erenumab-Aooe | 71 | 12 |
| Sumatriptan Succinate | Sumatriptan Succinate | 68 | 11 |
| Mirtazapine | Mirtazapine | 67 | 22 |
| Prednisone | Prednisone | 62 | 17 |
| Diazepam | Diazepam | 61 | 17 |
| Lacosamide | Lacosamide | 61 | 13 |
| Tramadol Hcl | Tramadol Hcl | 61 | 18 |
| Levetiracetam | Levetiracetam | 59 | 17 |
| Dexamethasone | Dexamethasone | 57 | 16 |
| Memantine Hcl | Memantine Hcl | 56 | 18 |
| Propranolol Hcl Er | Propranolol Hcl | 56 | 16 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 54 | 11 |
| Propranolol Hcl | Propranolol Hcl | 54 | 21 |
| Dextroamphetamine-Amphetamine | Dextroamphetamine/Amphetamine | 52 | 13 |
| Alprazolam | Alprazolam | 45 | 11 |
| Aripiprazole | Aripiprazole | 44 | 12 |
| Quetiapine Fumarate | Quetiapine Fumarate | 44 | 14 |
| Methylphenidate Hcl | Methylphenidate Hcl | 43 | 15 |
| Emgality Syringe | Galcanezumab-Gnlm | 39 | suppressed |
| Promethazine Hcl | Promethazine Hcl | 39 | suppressed |
| Mycophenolate Mofetil | Mycophenolate Mofetil | 38 | suppressed |
| Venlafaxine Hcl Er | Venlafaxine Hcl | 38 | 13 |
| Ropinirole Hcl | Ropinirole Hcl | 36 | 11 |
| Austedo | Deutetrabenazine | 33 | suppressed |
| Primidone | Primidone | 33 | suppressed |
| Pyridostigmine Bromide | Pyridostigmine Bromide | 33 | suppressed |
| Lorazepam | Lorazepam | 31 | suppressed |
| Oxycodone Hcl | Oxycodone Hcl | 30 | suppressed |
| Atorvastatin Calcium | Atorvastatin Calcium | 28 | suppressed |
| Modafinil | Modafinil | 27 | suppressed |
| Amitriptyline Hcl | Amitriptyline Hcl | 25 | suppressed |
| Cyclobenzaprine Hcl | Cyclobenzaprine Hcl | 25 | suppressed |
| Eliquis | Apixaban | 25 | suppressed |
| Methylprednisolone | Methylprednisolone | 25 | 15 |
| Zolpidem Tartrate | Zolpidem Tartrate | 25 | suppressed |
| Diphenhydramine Hcl | Diphenhydramine Hcl | 24 | 21 |
| Panzyga | Immun Glob G(Igg)-Ifas/Glycine | 24 | suppressed |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 22 | suppressed |
| Ondansetron Hcl | Ondansetron Hcl | 19 | suppressed |
| Ultomiris | Ravulizumab-Cwvz | 19 | suppressed |
| Clopidogrel | Clopidogrel Bisulfate | 18 | suppressed |
| Oxcarbazepine | Oxcarbazepine | 18 | suppressed |
| Atomoxetine Hcl | Atomoxetine Hcl | 17 | suppressed |
| Escitalopram Oxalate | Escitalopram Oxalate | 17 | suppressed |
| Benztropine Mesylate | Benztropine Mesylate | 15 | suppressed |
| Fluconazole | Fluconazole | 15 | suppressed |
| Qulipta | Atogepant | 14 | suppressed |
| Temazepam | Temazepam | 14 | suppressed |
| Amantadine | Amantadine Hcl | 13 | suppressed |
| Butalbital-Acetaminophen-Caffe | Butalb/Acetaminophen/Caffeine | 13 | suppressed |
| Droxidopa | Droxidopa | 13 | suppressed |
| Eszopiclone | Eszopiclone | 13 | suppressed |
| Fentanyl | Fentanyl | 13 | suppressed |
| Vyvgart | Efgartigimod Alfa-Fcab | 13 | suppressed |
| Zonisamide | Zonisamide | 13 | suppressed |
| Butalb-Acetaminoph-Caff-Codein | Butalbit/Acetamin/Caff/Codeine | 12 | suppressed |
| Carbamazepine Er | Carbamazepine | 12 | suppressed |
| Epidiolex | Cannabidiol (Cbd) | 12 | suppressed |
| Fludrocortisone Acetate | Fludrocortisone Acetate | 12 | suppressed |
| Methadone Hcl | Methadone Hcl | 12 | suppressed |
| Nurtec Odt | Rimegepant Sulfate | 12 | suppressed |
| Octagam | Immun Globg(Igg)/Malt/Iga Ov50 | 12 | suppressed |
| Trazodone Hcl | Trazodone Hcl | 12 | suppressed |
| Trintellix | Vortioxetine Hydrobromide | 12 | suppressed |
| Briviact | Brivaracetam | 11 | suppressed |
| Prochlorperazine Maleate | Prochlorperazine Maleate | 11 | suppressed |
| Rufinamide | Rufinamide | 11 | suppressed |
| Xcopri | Cenobamate | 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 | $24,814.01 · 47 records | Alexion Pharmaceuticals, Inc. | Albuked, GAMMAKED, KEDRAB, KOATE, NURTEC ODT, RhoGAM Ultra-Filtered PLUS, ULTOMIRIS, UPLIZNA, VYVGART HYTRULO, ZAVZPRET | 6 | — |
| 2024 | — | — | — | — | Complete |
Questions to ask
Questions you could discuss with your doctor
- What role, if any, does Gammaked play in your treatment recommendations for me?
- How do you evaluate evidence when you have a financial relationship with ARGENX US, 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