Healthcare provider profile · identity verified

John A Gelzhiser, M.D.

Internal Medicine · WARWICK, RI · NPI 1013100759

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
Atorvastatin Calcium	Atorvastatin Calcium	980	293
Eliquis	Apixaban	936	136
Trazodone Hcl	Trazodone Hcl	908	167
Levothyroxine Sodium	Levothyroxine Sodium	844	150
Furosemide	Furosemide	815	154
Sertraline Hcl	Sertraline Hcl	545	95
Amlodipine Besylate	Amlodipine Besylate	427	123
Metoprolol Succinate	Metoprolol Succinate	427	136
Escitalopram Oxalate	Escitalopram Oxalate	389	80
Mirtazapine	Mirtazapine	377	111
Gabapentin	Gabapentin	375	111
Metoprolol Tartrate	Metoprolol Tartrate	340	91
Lisinopril	Lisinopril	330	86
Losartan Potassium	Losartan Potassium	292	93
Pantoprazole Sodium	Pantoprazole Sodium	271	100
Donepezil Hcl	Donepezil Hcl	238	48
Metformin Hcl	Metformin Hcl	236	67
Quetiapine Fumarate	Quetiapine Fumarate	227	49
Tamsulosin Hcl	Tamsulosin Hcl	216	77
Omeprazole	Omeprazole	213	76
Warfarin Sodium	Warfarin Sodium	208	16
Duloxetine Hcl	Duloxetine Hcl	186	41
Potassium Chloride	Potassium Chloride	179	55
Jardiance	Empagliflozin	178	36
Clopidogrel	Clopidogrel Bisulfate	165	49
Pravastatin Sodium	Pravastatin Sodium	156	38
Famotidine	Famotidine	155	47
Carvedilol	Carvedilol	145	46
Simvastatin	Simvastatin	144	48
Levetiracetam	Levetiracetam	139	32
Carbidopa-Levodopa	Carbidopa/Levodopa	138	30
Prednisone	Prednisone	136	46
Memantine Hcl	Memantine Hcl	134	25
Allopurinol	Allopurinol	133	35
Citalopram Hbr	Citalopram Hydrobromide	131	28
Latanoprost	Latanoprost	122	19
Finasteride	Finasteride	115	30
Spironolactone	Spironolactone	113	26
Atenolol	Atenolol	112	23
Fluoxetine Hcl	Fluoxetine Hcl	99	23
Fluticasone Propionate	Fluticasone Propionate	97	31
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	95	40
Trulicity	Dulaglutide	95	11
Albuterol Sulfate Hfa	Albuterol Sulfate	94	62
Ondansetron Odt	Ondansetron	91	38
Doxycycline Hyclate	Doxycycline Hyclate	86	34
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	81	30
Ondansetron Hcl	Ondansetron Hcl	81	44
Olanzapine	Olanzapine	79	11
Buspirone Hcl	Buspirone Hcl	75	26
Montelukast Sodium	Montelukast Sodium	74	23
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	73	33
Anastrozole	Anastrozole	73	suppressed
Colchicine	Colchicine	73	19
Risperidone	Risperidone	72	11
Cephalexin	Cephalexin	70	33
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	70	17
Oxybutynin Chloride Er	Oxybutynin Chloride	70	23
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	70	11
Entresto	Sacubitril/Valsartan	68	13
Oseltamivir Phosphate	Oseltamivir Phosphate	68	53
Hydroxyzine Hcl	Hydroxyzine Hcl	67	11
Januvia	Sitagliptin Phosphate	64	suppressed
Bupropion Xl	Bupropion Hcl	63	16
Nebivolol Hcl	Nebivolol Hcl	63	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	62	33
Venlafaxine Hcl Er	Venlafaxine Hcl	59	16
Hydralazine Hcl	Hydralazine Hcl	58	20
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	56	11
Incruse Ellipta	Umeclidinium Bromide	55	suppressed
Klayesta	Nystatin	55	26
Amiodarone Hcl	Amiodarone Hcl	54	14
Autoshield Duo Pen Needle	Pen Needle,dual Safety,diabetc	50	13
Doxycycline Monohydrate	Doxycycline Monohydrate	50	23
Myrbetriq	Mirabegron	50	suppressed
Permethrin	Permethrin	50	33
Baclofen	Baclofen	48	13
Clobetasol Propionate	Clobetasol Propionate	48	suppressed
Torsemide	Torsemide	47	15
Xarelto	Rivaroxaban	46	20
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	44	20
Meloxicam	Meloxicam	44	21
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	44	16
Bumetanide	Bumetanide	41	30
Insulin Lispro Kwikpen U-100	Insulin Lispro	40	19
Midodrine Hcl	Midodrine Hcl	40	15
Hydrochlorothiazide	Hydrochlorothiazide	39	16
Lamotrigine	Lamotrigine	39	14
Metformin Hcl Er	Metformin Hcl	39	16
Alendronate Sodium	Alendronate Sodium	38	13
Ezetimibe	Ezetimibe	36	14
Digoxin	Digoxin	35	suppressed
Enalapril Maleate	Enalapril Maleate	35	11
Lantus	Insulin Glargine,hum.Rec.Anlog	34	suppressed
Diltiazem 24hr Er (La)	Diltiazem Hcl	33	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	32	17
Methocarbamol	Methocarbamol	32	18
Paroxetine Hcl	Paroxetine Hcl	32	16
Azithromycin	Azithromycin	31	18
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	31	suppressed
Humalog Kwikpen U-100	Insulin Lispro	31	14
Levofloxacin	Levofloxacin	31	18
Veltassa	Patiromer Calcium Sorbitex	31	suppressed
Amoxicillin	Amoxicillin	30	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	30	16
Venlafaxine Hcl	Venlafaxine Hcl	30	suppressed
Divalproex Sodium	Divalproex Sodium	29	suppressed
Atropine Sulfate	Atropine Sulfate	28	25
Breo Ellipta	Fluticasone/Vilanterol	28	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	28	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	27	suppressed
Glipizide	Glipizide	27	13
Haloperidol Lactate	Haloperidol Lactate	27	12
Bupropion Hcl	Bupropion Hcl	26	suppressed
Bupropion Hcl Sr	Bupropion Hcl	26	suppressed
Divalproex Sodium Er	Divalproex Sodium	26	suppressed
Glipizide Er	Glipizide	26	11
Meclizine Hcl	Meclizine Hcl	26	16
Nifedipine Er	Nifedipine	26	suppressed
Propranolol Hcl	Propranolol Hcl	26	suppressed
Ingrezza	Valbenazine Tosylate	25	suppressed
Timolol Maleate	Timolol Maleate	25	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	25	suppressed
Aripiprazole	Aripiprazole	24	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	24	suppressed
Ropinirole Hcl	Ropinirole Hcl	24	suppressed
Albuterol Sulfate	Albuterol Sulfate	23	14
Fluphenazine Hcl	Fluphenazine Hcl	23	suppressed
Prednisolone Acetate	Prednisolone Acetate	23	suppressed
Ceftriaxone	Ceftriaxone Sodium	22	14
Rosuvastatin Calcium	Rosuvastatin Calcium	22	suppressed
Ertapenem	Ertapenem Sodium	21	suppressed
Farxiga	Dapagliflozin Propanediol	21	suppressed
Fluticasone Propionate Hfa	Fluticasone Propionate	21	suppressed
Lithium Carbonate	Lithium Carbonate	21	suppressed
Nuplazid	Pimavanserin Tartrate	21	suppressed
Ramelteon	Ramelteon	21	suppressed
Sulfasalazine	Sulfasalazine	21	suppressed
Valacyclovir	Valacyclovir Hcl	21	suppressed
Amantadine	Amantadine Hcl	20	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	20	suppressed
Benztropine Mesylate	Benztropine Mesylate	20	suppressed
Memantine Hcl Er	Memantine Hcl	20	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	20	suppressed
Nystatin	Nystatin	20	13
Rasagiline Mesylate	Rasagiline Mesylate	20	suppressed
Diltiazem 12hr Er	Diltiazem Hcl	19	suppressed
Erythromycin	Erythromycin Base	19	12
Fluconazole	Fluconazole	19	13
Fluvoxamine Maleate	Fluvoxamine Maleate	19	suppressed
Lactulose	Lactulose	19	suppressed
Brimonidine Tartrate-Timolol	Brimonidine Tartrate/Timolol	18	suppressed
Lidocaine Hcl	Lidocaine Hcl	18	13
Solifenacin Succinate	Solifenacin Succinate	18	suppressed
Topiramate	Topiramate	18	suppressed
Difluprednate	Difluprednate	17	suppressed
Lansoprazole	Lansoprazole	17	suppressed
Methimazole	Methimazole	17	suppressed
Premarin	Estrogens, Conjugated	17	suppressed
Terazosin Hcl	Terazosin Hcl	17	suppressed
Glimepiride	Glimepiride	16	suppressed
Spiriva Handihaler	Tiotropium Bromide	16	suppressed
Clonidine Hcl	Clonidine Hcl	15	suppressed
Fluocinonide	Fluocinonide	15	suppressed
Metolazone	Metolazone	15	suppressed
Primidone	Primidone	15	suppressed
Symbicort	Budesonide/Formoterol Fumarate	15	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	14	suppressed
Arnuity Ellipta	Fluticasone Furoate	14	suppressed
Atrovent Hfa	Ipratropium Bromide	14	suppressed
Cefuroxime	Cefuroxime Axetil	14	suppressed
Clotrimazole	Clotrimazole	14	suppressed
Diclofenac Sodium	Diclofenac Sodium	14	13
Dorzolamide Hcl	Dorzolamide Hcl	14	suppressed
Raloxifene Hcl	Raloxifene Hcl	14	suppressed
Risperdal Consta	Risperidone Microspheres	14	suppressed
Valsartan	Valsartan	14	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	13	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	13	suppressed
Lidocaine Hcl	Lidocaine Hcl/Pf	13	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	13	suppressed
Sodium Chloride	0.9 % Sodium Chloride	13	suppressed
Sps	Sodium Polystyrene Sulfon/Sorb	13	suppressed
Sucralfate	Sucralfate	13	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	12	suppressed
Cefpodoxime Proxetil	Cefpodoxime Proxetil	12	suppressed
Cilostazol	Cilostazol	12	suppressed
Creon	Lipase/Protease/Amylase	12	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	12	suppressed
Entacapone	Entacapone	12	suppressed
Mupirocin	Mupirocin	12	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	11	suppressed
Estradiol	Estradiol	11	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	11	suppressed
Nystop	Nystatin	11	11
Paxlovid	Nirmatrelvir/Ritonavir	11	11
Pradaxa	Dabigatran Etexilate Mesylate	11	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	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