Healthcare provider profile · identity verified

John Sparrow Duffy, MD

Family Practice · CANTON, NY · NPI 1295710358

Profile state: partd only Open Payments: 2025 Medicare Part D: 2024 Last identity check: 2026-08-10 Page data build: 2026-08-12

Verified facts

What the public records show

We did not find matching Open Payments records for this doctor in 2025.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

We did not find matching Open Payments records for this doctor in the selected program year.

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.

Analysis 1 · Payment-linked products

Products named in Open Payments records

No payment-linked product analysis is available because no matching General Payment records were found for the selected year.

Public prescribing for products named in payments

There is no explicit payment-product set available for a Part D comparison.

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.

There is no payer-company set available for this comparison.

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
Levothyroxine Sodium	Levothyroxine Sodium	464	84
Omeprazole	Omeprazole	449	104
Atorvastatin Calcium	Atorvastatin Calcium	427	101
Pantoprazole Sodium	Pantoprazole Sodium	354	77
Tamsulosin Hcl	Tamsulosin Hcl	279	47
Amlodipine Besylate	Amlodipine Besylate	276	77
Lisinopril	Lisinopril	272	60
Metoprolol Succinate	Metoprolol Succinate	255	56
Hydrochlorothiazide	Hydrochlorothiazide	198	48
Furosemide	Furosemide	197	41
Losartan Potassium	Losartan Potassium	196	51
Rosuvastatin Calcium	Rosuvastatin Calcium	192	51
Metoprolol Tartrate	Metoprolol Tartrate	191	38
Famotidine	Famotidine	190	32
Metformin Hcl	Metformin Hcl	184	50
Gabapentin	Gabapentin	166	31
Simvastatin	Simvastatin	164	35
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	121	73
Alendronate Sodium	Alendronate Sodium	114	22
Escitalopram Oxalate	Escitalopram Oxalate	111	25
Azithromycin	Azithromycin	106	72
Albuterol Sulfate Hfa	Albuterol Sulfate	102	36
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	99	24
Atenolol	Atenolol	93	24
Eliquis	Apixaban	85	23
Lactulose	Lactulose	84	11
Enalapril Maleate	Enalapril Maleate	76	17
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	75	22
Doxycycline Hyclate	Doxycycline Hyclate	72	38
Finasteride	Finasteride	72	17
Vitamin D2	Ergocalciferol (Vitamin D2)	72	23
Trazodone Hcl	Trazodone Hcl	71	12
Carvedilol	Carvedilol	69	13
Sertraline Hcl	Sertraline Hcl	69	18
Montelukast Sodium	Montelukast Sodium	67	15
Potassium Chloride	Potassium Chloride	64	14
Lorazepam	Lorazepam	59	18
Xarelto	Rivaroxaban	59	11
Methylprednisolone	Methylprednisolone	58	41
Ciprofloxacin Hcl	Ciprofloxacin Hcl	56	43
Metformin Hcl Er	Metformin Hcl	56	14
Lovastatin	Lovastatin	54	suppressed
Nystatin	Nystatin	54	22
Buspirone Hcl	Buspirone Hcl	53	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	51	suppressed
Pravastatin Sodium	Pravastatin Sodium	50	16
Sucralfate	Sucralfate	50	suppressed
Spironolactone	Spironolactone	49	12
Duloxetine Hcl	Duloxetine Hcl	44	suppressed
Ibuprofen	Ibuprofen	44	11
Pregabalin	Pregabalin	44	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	43	18
Phenobarbital	Phenobarbital	43	suppressed
Alprazolam	Alprazolam	42	suppressed
Fluticasone Propionate	Fluticasone Propionate	42	16
Esomeprazole Magnesium	Esomeprazole Magnesium	41	suppressed
Carbamazepine	Carbamazepine	40	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	40	suppressed
Meloxicam	Meloxicam	38	suppressed
Ezetimibe	Ezetimibe	37	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	37	suppressed
Clonazepam	Clonazepam	35	suppressed
Levetiracetam	Levetiracetam	34	suppressed
Risperidone	Risperidone	34	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	33	suppressed
Celecoxib	Celecoxib	32	suppressed
Clopidogrel	Clopidogrel Bisulfate	32	suppressed
Hydralazine Hcl	Hydralazine Hcl	32	suppressed
Linzess	Linaclotide	32	suppressed
Mirtazapine	Mirtazapine	32	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	32	suppressed
Valsartan	Valsartan	32	suppressed
Fluconazole	Fluconazole	31	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	30	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	29	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	26	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	25	suppressed
Chlorpromazine Hcl	Chlorpromazine Hcl	25	suppressed
Ketoconazole	Ketoconazole	25	suppressed
Donepezil Hcl	Donepezil Hcl	24	suppressed
Glipizide Er	Glipizide	24	suppressed
Lithium Carbonate	Lithium Carbonate	23	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	23	suppressed
Tramadol Hcl	Tramadol Hcl	23	suppressed
Zonisamide	Zonisamide	23	suppressed
Allopurinol	Allopurinol	22	suppressed
Cefpodoxime Proxetil	Cefpodoxime Proxetil	22	suppressed
Diclofenac Sodium-Misoprostol	Diclofenac Sodium/Misoprostol	22	suppressed
Ropinirole Hcl	Ropinirole Hcl	22	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	22	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	21	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	21	suppressed
Enalapril-Hydrochlorothiazide	Enalapril/Hydrochlorothiazide	21	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	21	suppressed
Ramipril	Ramipril	20	suppressed
Citalopram Hbr	Citalopram Hydrobromide	19	suppressed
Colchicine	Colchicine	19	suppressed
Ipratropium Bromide	Ipratropium Bromide	19	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	19	suppressed
Prednisone	Prednisone	19	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	18	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	18	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	18	suppressed
Colesevelam Hcl	Colesevelam Hcl	17	suppressed
Divalproex Sodium	Divalproex Sodium	17	suppressed
Gemfibrozil	Gemfibrozil	17	suppressed
Januvia	Sitagliptin Phosphate	17	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	17	suppressed
Synthroid	Levothyroxine Sodium	17	suppressed
Tizanidine Hcl	Tizanidine Hcl	17	suppressed
Topiramate	Topiramate	17	suppressed
Warfarin Sodium	Warfarin Sodium	17	suppressed
Candesartan Cilexetil	Candesartan Cilexetil	15	suppressed
Glimepiride	Glimepiride	15	suppressed
Glipizide	Glipizide	15	suppressed
Ibandronate Sodium	Ibandronate Sodium	15	suppressed
Jardiance	Empagliflozin	15	suppressed
Lamotrigine	Lamotrigine	15	suppressed
Meclizine Hcl	Meclizine Hcl	15	suppressed
Naproxen	Naproxen	15	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	15	suppressed
Propranolol Hcl	Propranolol Hcl	15	suppressed
Lacosamide	Lacosamide	14	suppressed
Nifedipine Er	Nifedipine	14	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	14	suppressed
Betamethasone Dipropionate	Betamethasone Dipropionate	13	suppressed
Clonidine Hcl	Clonidine Hcl	13	suppressed
Lansoprazole	Lansoprazole	13	suppressed
Naltrexone Hcl	Naltrexone Hcl	13	suppressed
Novolog Flexpen	Insulin Aspart	13	suppressed
Phenytoin	Phenytoin	13	suppressed
Trihexyphenidyl Hcl	Trihexyphenidyl Hcl	13	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	12	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	12	11
Benazepril Hcl	Benazepril Hcl	12	suppressed
Benztropine Mesylate	Benztropine Mesylate	12	suppressed
Gemtesa	Vibegron	12	suppressed
Memantine Hcl	Memantine Hcl	12	suppressed
Methotrexate	Methotrexate Sodium	12	suppressed
Ofloxacin	Ofloxacin	12	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	12	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	12	suppressed
Valacyclovir	Valacyclovir Hcl	12	suppressed
Valproic Acid	Valproic Acid (As Sodium Salt)	12	suppressed
Ventolin Hfa	Albuterol Sulfate	12	suppressed
Cefdinir	Cefdinir	11	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	11	suppressed
Indapamide	Indapamide	11	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	11	suppressed
Methenamine Hippurate	Methenamine Hippurate	11	suppressed
Symbicort	Budesonide/Formoterol Fumarate	11	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	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	—	—	—	—	—
2024	—	—	—	—	Complete

Questions to ask

Questions you could discuss with your doctor

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

Methodology version: 2.1

Editorial template version: 2.4

Product contract version: 2.0

Schema version: 0.7.0

Page data build: 2026-08-12T23:34:59.370714+00:00

Publication policy: eligible for indexing after public-launch controls are enabled

Full methodology · Questions & answers · Report a possible error