Healthcare provider profile · identity verified

John Mark Prater, MD

Family Practice · DALLAS, PA · NPI 1992889885

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	639	132
Atorvastatin Calcium	Atorvastatin Calcium	593	137
Amlodipine Besylate	Amlodipine Besylate	452	111
Omeprazole	Omeprazole	426	119
Rosuvastatin Calcium	Rosuvastatin Calcium	397	94
Lisinopril	Lisinopril	364	93
Losartan Potassium	Losartan Potassium	237	61
Metoprolol Succinate	Metoprolol Succinate	213	56
Metformin Hcl	Metformin Hcl	188	54
Tamsulosin Hcl	Tamsulosin Hcl	183	47
Gabapentin	Gabapentin	177	38
Alprazolam	Alprazolam	175	50
Simvastatin	Simvastatin	172	45
Furosemide	Furosemide	171	54
Eliquis	Apixaban	160	31
Metformin Hcl Er	Metformin Hcl	147	33
Hydrochlorothiazide	Hydrochlorothiazide	146	38
Metoprolol Tartrate	Metoprolol Tartrate	145	37
Pravastatin Sodium	Pravastatin Sodium	136	35
Albuterol Sulfate Hfa	Albuterol Sulfate	131	45
Tramadol Hcl	Tramadol Hcl	131	24
Sertraline Hcl	Sertraline Hcl	124	26
Duloxetine Hcl	Duloxetine Hcl	122	24
Carvedilol	Carvedilol	120	33
Potassium Chloride	Potassium Chloride	120	23
Fluticasone Propionate	Fluticasone Propionate	117	50
Escitalopram Oxalate	Escitalopram Oxalate	108	28
Famotidine	Famotidine	107	29
Allopurinol	Allopurinol	105	24
Olmesartan Medoxomil	Olmesartan Medoxomil	105	23
Atenolol	Atenolol	101	26
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	98	14
Pantoprazole Sodium	Pantoprazole Sodium	98	23
Glimepiride	Glimepiride	96	23
Synthroid	Levothyroxine Sodium	92	20
Triamcinolone Acetonide	Triamcinolone Acetonide	88	51
Warfarin Sodium	Warfarin Sodium	87	23
Clopidogrel	Clopidogrel Bisulfate	85	20
Prednisone	Prednisone	80	48
Fluconazole	Fluconazole	75	13
Ezetimibe	Ezetimibe	71	19
Solifenacin Succinate	Solifenacin Succinate	68	15
Montelukast Sodium	Montelukast Sodium	67	17
Finasteride	Finasteride	66	15
Ozempic	Semaglutide	63	15
Trazodone Hcl	Trazodone Hcl	62	15
Meloxicam	Meloxicam	61	21
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	56	14
Paroxetine Hcl	Paroxetine Hcl	55	12
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	54	16
Jardiance	Empagliflozin	54	12
Clonazepam	Clonazepam	50	suppressed
Valsartan	Valsartan	48	11
Citalopram Hbr	Citalopram Hydrobromide	46	suppressed
Benazepril Hcl	Benazepril Hcl	45	14
Dulera	Mometasone/Formoterol	45	suppressed
Alendronate Sodium	Alendronate Sodium	44	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	43	12
Doxycycline Hyclate	Doxycycline Hyclate	43	33
Bumetanide	Bumetanide	41	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	40	11
Klor-Con M20	Potassium Chloride	39	suppressed
Propranolol Hcl	Propranolol Hcl	38	suppressed
Azithromycin	Azithromycin	37	32
Oxycodone Hcl	Oxycodone Hcl	37	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	36	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	36	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	35	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	34	suppressed
Levetiracetam	Levetiracetam	33	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	33	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	31	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	31	11
Repaglinide	Repaglinide	31	suppressed
Buspirone Hcl	Buspirone Hcl	30	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	30	18
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	30	13
Hydrocortisone	Hydrocortisone	30	suppressed
Torsemide	Torsemide	30	suppressed
Ventolin Hfa	Albuterol Sulfate	30	suppressed
Diclofenac Sodium	Diclofenac Sodium	29	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	29	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	29	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	29	suppressed
Methylprednisolone	Methylprednisolone	28	27
Incruse Ellipta	Umeclidinium Bromide	27	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	27	suppressed
Lorazepam	Lorazepam	27	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	26	suppressed
Lansoprazole	Lansoprazole	25	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	25	suppressed
Ramipril	Ramipril	25	suppressed
Bupropion Hcl Sr	Bupropion Hcl	24	11
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	24	suppressed
Clonidine Hcl	Clonidine Hcl	23	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	23	suppressed
Sucralfate	Sucralfate	23	suppressed
Valacyclovir	Valacyclovir Hcl	23	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	22	19
Propranolol Hcl Er	Propranolol Hcl	22	suppressed
Nifedipine Er	Nifedipine	21	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	20	suppressed
Baclofen	Baclofen	20	suppressed
Breo Ellipta	Fluticasone/Vilanterol	20	suppressed
Mirtazapine	Mirtazapine	20	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	20	20
Primidone	Primidone	20	suppressed
Tradjenta	Linagliptin	20	suppressed
Benztropine Mesylate	Benztropine Mesylate	19	suppressed
Donepezil Hcl	Donepezil Hcl	19	suppressed
Linzess	Linaclotide	19	suppressed
Ondansetron Hcl	Ondansetron Hcl	19	11
Pregabalin	Pregabalin	19	suppressed
Amoxicillin	Amoxicillin	18	12
Cefdinir	Cefdinir	18	15
Spironolactone	Spironolactone	18	suppressed
Labetalol Hcl	Labetalol Hcl	17	suppressed
Temazepam	Temazepam	17	suppressed
Cephalexin	Cephalexin	16	suppressed
Cholestyramine	Cholestyramine (With Sugar)	16	suppressed
Januvia	Sitagliptin Phosphate	16	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	16	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	15	suppressed
Lamotrigine	Lamotrigine	15	suppressed
Nadolol	Nadolol	15	suppressed
Novolog	Insulin Aspart	15	suppressed
Nystatin	Nystatin	15	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	15	suppressed
Dutasteride	Dutasteride	14	suppressed
Meclizine Hcl	Meclizine Hcl	14	suppressed
Myrbetriq	Mirabegron	14	suppressed
Naproxen	Naproxen	14	suppressed
Ropinirole Er	Ropinirole Hcl	14	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	14	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	14	suppressed
Levoxyl	Levothyroxine Sodium	13	suppressed
Tizanidine Hcl	Tizanidine Hcl	13	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	12	suppressed
Enoxaparin Sodium	Enoxaparin Sodium	12	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	12	suppressed
Mycophenolate Mofetil	Mycophenolate Mofetil	12	suppressed
Novolog Flexpen	Insulin Aspart	12	suppressed
Xarelto	Rivaroxaban	12	suppressed
Chlorthalidone	Chlorthalidone	11	suppressed
Clotrimazole	Clotrimazole	11	suppressed
Enalapril Maleate	Enalapril Maleate	11	suppressed
Fenofibric Acid	Fenofibric Acid (Choline)	11	suppressed
Invokana	Canagliflozin	11	suppressed
Morphine Sulfate Er	Morphine Sulfate	11	suppressed
Nyamyc	Nystatin	11	suppressed
Olanzapine	Olanzapine	11	suppressed
Verapamil Er	Verapamil Hcl	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