Healthcare provider profile · identity verified

John P Dzik, DO

Family Practice · AMARILLO, TX · NPI 1659339950

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
Furosemide	Furosemide	658	104
Atorvastatin Calcium	Atorvastatin Calcium	648	110
Levothyroxine Sodium	Levothyroxine Sodium	559	82
Eliquis	Apixaban	532	58
Potassium Chloride	Potassium Chloride	487	107
Amlodipine Besylate	Amlodipine Besylate	392	66
Lisinopril	Lisinopril	385	65
Tamsulosin Hcl	Tamsulosin Hcl	377	57
Pantoprazole Sodium	Pantoprazole Sodium	321	72
Gabapentin	Gabapentin	290	68
Carvedilol	Carvedilol	208	40
Clopidogrel	Clopidogrel Bisulfate	207	39
Tramadol Hcl	Tramadol Hcl	200	51
Sertraline Hcl	Sertraline Hcl	195	36
Metoprolol Tartrate	Metoprolol Tartrate	186	40
Duloxetine Hcl	Duloxetine Hcl	172	36
Donepezil Hcl	Donepezil Hcl	171	37
Losartan Potassium	Losartan Potassium	156	36
Mirtazapine	Mirtazapine	150	39
Metoprolol Succinate	Metoprolol Succinate	146	34
Methocarbamol	Methocarbamol	145	42
Metformin Hcl	Metformin Hcl	144	26
Jardiance	Empagliflozin	143	25
Acetaminophen-Codeine	Acetaminophen With Codeine	141	49
Quetiapine Fumarate	Quetiapine Fumarate	131	28
Allopurinol	Allopurinol	113	15
Memantine Hcl	Memantine Hcl	105	23
Buspirone Hcl	Buspirone Hcl	99	22
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	98	53
Hydrochlorothiazide	Hydrochlorothiazide	93	15
Risperidone	Risperidone	92	15
Omeprazole	Omeprazole	91	24
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	89	24
Divalproex Sodium	Divalproex Sodium	87	15
Xarelto	Rivaroxaban	86	13
Levetiracetam	Levetiracetam	84	17
Trazodone Hcl	Trazodone Hcl	83	20
Glipizide	Glipizide	77	12
Pregabalin	Pregabalin	76	18
Ropinirole Hcl	Ropinirole Hcl	72	15
Gemtesa	Vibegron	70	suppressed
Spironolactone	Spironolactone	70	20
Baclofen	Baclofen	67	12
Escitalopram Oxalate	Escitalopram Oxalate	66	21
Paroxetine Hcl	Paroxetine Hcl	66	11
Lantus	Insulin Glargine,hum.Rec.Anlog	63	16
Simvastatin	Simvastatin	62	suppressed
Bupropion Xl	Bupropion Hcl	60	suppressed
Montelukast Sodium	Montelukast Sodium	60	14
Amiodarone Hcl	Amiodarone Hcl	57	suppressed
Entresto	Sacubitril/Valsartan	57	11
Fluticasone Propionate	Fluticasone Propionate	56	20
Diclofenac Sodium	Diclofenac Sodium	55	17
Hydroxyzine Hcl	Hydroxyzine Hcl	55	19
Celecoxib	Celecoxib	54	11
Ondansetron Hcl	Ondansetron Hcl	54	39
Clonazepam	Clonazepam	52	11
Januvia	Sitagliptin Phosphate	52	suppressed
Rosuvastatin Calcium	Rosuvastatin Calcium	50	11
Famotidine	Famotidine	49	15
Ciprofloxacin Hcl	Ciprofloxacin Hcl	46	33
Divalproex Sodium Er	Divalproex Sodium	46	suppressed
Finasteride	Finasteride	46	12
Trintellix	Vortioxetine Hydrobromide	43	suppressed
Aripiprazole	Aripiprazole	41	13
Nystatin	Nystatin	41	27
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	39	27
Sucralfate	Sucralfate	38	suppressed
Hydralazine Hcl	Hydralazine Hcl	37	14
Pravastatin Sodium	Pravastatin Sodium	36	12
Atenolol	Atenolol	35	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	35	24
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	35	23
Myrbetriq	Mirabegron	35	suppressed
Cephalexin	Cephalexin	34	26
Midodrine Hcl	Midodrine Hcl	34	12
Carbidopa-Levodopa	Carbidopa/Levodopa	33	suppressed
Cilostazol	Cilostazol	33	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	33	12
Citalopram Hbr	Citalopram Hydrobromide	32	suppressed
Novolog Flexpen	Insulin Aspart	32	14
Oxybutynin Chloride Er	Oxybutynin Chloride	32	suppressed
Tizanidine Hcl	Tizanidine Hcl	32	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	31	25
Albuterol Sulfate Hfa	Albuterol Sulfate	29	suppressed
Olanzapine	Olanzapine	29	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	28	12
Insulin Lispro Kwikpen U-100	Insulin Lispro	28	suppressed
Velphoro	Sucroferric Oxyhydroxide	28	suppressed
Farxiga	Dapagliflozin Propanediol	27	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	27	15
Sodium Chloride	0.9 % Sodium Chloride	27	18
Alprazolam	Alprazolam	26	12
Digoxin	Digoxin	26	suppressed
Fentanyl	Fentanyl	26	suppressed
Lamotrigine	Lamotrigine	26	suppressed
Meloxicam	Meloxicam	26	suppressed
Ceftriaxone	Ceftriaxone Sodium	24	18
Dicyclomine Hcl	Dicyclomine Hcl	24	suppressed
Methotrexate	Methotrexate Sodium	24	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	24	21
Latanoprost	Latanoprost	23	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	22	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	22	suppressed
Fluvoxamine Maleate	Fluvoxamine Maleate	22	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	22	suppressed
Clonidine Hcl	Clonidine Hcl	21	suppressed
Megestrol Acetate	Megestrol Acetate	21	suppressed
Nystop	Nystatin	21	14
Lidocaine Hcl	Lidocaine Hcl	20	17
Prednisone	Prednisone	20	14
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	19	suppressed
Ezetimibe	Ezetimibe	19	suppressed
Lactulose	Lactulose	19	suppressed
Nifedipine Er	Nifedipine	19	suppressed
Nuedexta	Dextromethorphan Hbr/Quinidine	19	suppressed
Amoxicillin	Amoxicillin	18	15
Gemfibrozil	Gemfibrozil	18	suppressed
Metolazone	Metolazone	18	suppressed
Novolog	Insulin Aspart	18	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	18	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	18	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	18	suppressed
Albuterol Sulfate	Albuterol Sulfate	17	12
Alendronate Sodium	Alendronate Sodium	17	suppressed
Warfarin Sodium	Warfarin Sodium	17	suppressed
Azithromycin	Azithromycin	16	13
Ibuprofen	Ibuprofen	16	suppressed
Irbesartan	Irbesartan	16	suppressed
Levemir	Insulin Detemir	16	suppressed
Ondansetron Odt	Ondansetron	16	suppressed
Torsemide	Torsemide	16	suppressed
Cholestyramine	Cholestyramine (With Sugar)	15	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	15	suppressed
Insulin Aspart Flexpen	Insulin Aspart	15	suppressed
Lorazepam	Lorazepam	15	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	14	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	14	suppressed
Cefdinir	Cefdinir	14	suppressed
Insulin Lispro	Insulin Lispro	14	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	14	suppressed
Klayesta	Nystatin	14	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	13	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	13	suppressed
Dapagliflozin	Dapagliflozin Propanediol	13	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	13	suppressed
Haloperidol	Haloperidol	13	suppressed
Oseltamivir Phosphate	Oseltamivir Phosphate	13	13
Prednisolone Acetate	Prednisolone Acetate	13	suppressed
Terazosin Hcl	Terazosin Hcl	13	suppressed
Armour Thyroid	Thyroid,pork	12	suppressed
Budesonide	Budesonide	12	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	12	suppressed
Lansoprazole	Lansoprazole	12	suppressed
Levofloxacin	Levofloxacin	12	suppressed
Mupirocin	Mupirocin	12	suppressed
Propranolol Hcl	Propranolol Hcl	12	suppressed
Acitretin	Acitretin	11	suppressed
Benztropine Mesylate	Benztropine Mesylate	11	suppressed
Brimonidine Tartrate-Timolol	Brimonidine Tartrate/Timolol	11	suppressed
Combigan	Brimonidine Tartrate/Timolol	11	suppressed
Dorzolamide Hcl	Dorzolamide Hcl	11	suppressed
Glimepiride	Glimepiride	11	suppressed
Humalog Kwikpen U-100	Insulin Lispro	11	suppressed
Liothyronine Sodium	Liothyronine Sodium	11	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	11	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	11	suppressed
Primidone	Primidone	11	suppressed
Tiotropium Bromide	Tiotropium Bromide	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