Healthcare provider profile · identity verified

Karim Tourk, M.D.

Internal Medicine · NAPERVILLE, IL · NPI 1679569347

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	1446	194
Levothyroxine Sodium	Levothyroxine Sodium	1353	130
Eliquis	Apixaban	1058	100
Potassium Chloride	Potassium Chloride	1017	103
Furosemide	Furosemide	892	118
Gabapentin	Gabapentin	839	82
Amlodipine Besylate	Amlodipine Besylate	771	111
Escitalopram Oxalate	Escitalopram Oxalate	552	69
Memantine Hcl	Memantine Hcl	504	59
Omeprazole	Omeprazole	468	48
Tamsulosin Hcl	Tamsulosin Hcl	440	57
Metoprolol Tartrate	Metoprolol Tartrate	439	56
Donepezil Hcl	Donepezil Hcl	422	64
Quetiapine Fumarate	Quetiapine Fumarate	400	48
Clopidogrel	Clopidogrel Bisulfate	396	57
Pantoprazole Sodium	Pantoprazole Sodium	394	67
Lisinopril	Lisinopril	391	57
Carvedilol	Carvedilol	388	59
Sertraline Hcl	Sertraline Hcl	349	57
Metformin Hcl	Metformin Hcl	337	32
Losartan Potassium	Losartan Potassium	333	47
Torsemide	Torsemide	313	24
Trazodone Hcl	Trazodone Hcl	304	53
Allopurinol	Allopurinol	275	34
Mirtazapine	Mirtazapine	273	58
Jardiance	Empagliflozin	270	20
Levetiracetam	Levetiracetam	263	32
Myrbetriq	Mirabegron	247	14
Simvastatin	Simvastatin	241	32
Midodrine Hcl	Midodrine Hcl	218	36
Montelukast Sodium	Montelukast Sodium	213	23
Citalopram Hbr	Citalopram Hydrobromide	211	18
Xarelto	Rivaroxaban	208	19
Metoprolol Succinate	Metoprolol Succinate	198	46
Divalproex Sodium	Divalproex Sodium	194	35
Duloxetine Hcl	Duloxetine Hcl	185	28
Risperidone	Risperidone	184	30
Diltiazem Hcl	Diltiazem Hcl	176	11
Amiodarone Hcl	Amiodarone Hcl	173	19
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	172	44
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	155	44
Prednisone	Prednisone	149	33
Pravastatin Sodium	Pravastatin Sodium	147	17
Glipizide	Glipizide	146	21
Carbidopa-Levodopa	Carbidopa/Levodopa	142	21
Olanzapine	Olanzapine	138	24
Hydroxyzine Hcl	Hydroxyzine Hcl	135	19
Alendronate Sodium	Alendronate Sodium	134	19
Buspirone Hcl	Buspirone Hcl	132	suppressed
Finasteride	Finasteride	127	21
Digoxin	Digoxin	125	14
Warfarin Sodium	Warfarin Sodium	125	15
Cephalexin	Cephalexin	124	35
Januvia	Sitagliptin Phosphate	122	12
Hydralazine Hcl	Hydralazine Hcl	121	33
Oxybutynin Chloride Er	Oxybutynin Chloride	120	14
Ezetimibe	Ezetimibe	114	suppressed
Famotidine	Famotidine	112	17
Ondansetron Hcl	Ondansetron Hcl	108	62
Dicyclomine Hcl	Dicyclomine Hcl	107	suppressed
Humalog Kwikpen U-100	Insulin Lispro	107	14
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	105	15
Spironolactone	Spironolactone	104	23
Ursodiol	Ursodiol	103	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	101	suppressed
Solifenacin Succinate	Solifenacin Succinate	99	suppressed
Fenofibrate	Fenofibrate,micronized	97	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	95	12
Fluticasone Propionate	Fluticasone Propionate	87	39
Memantine Hcl Er	Memantine Hcl	87	suppressed
Liothyronine Sodium	Liothyronine Sodium	85	suppressed
Metolazone	Metolazone	79	suppressed
Baclofen	Baclofen	76	suppressed
Latanoprost	Latanoprost	75	16
Methocarbamol	Methocarbamol	75	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	74	33
Bupropion Xl	Bupropion Hcl	73	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	73	16
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	72	suppressed
Autoshield Duo Pen Needle	Pen Needle,dual Safety,diabetc	71	20
Lamotrigine	Lamotrigine	71	suppressed
Dilt-Xr	Diltiazem Hcl	69	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	69	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	68	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	68	11
Clonidine Hcl	Clonidine Hcl	67	suppressed
Lovastatin	Lovastatin	67	suppressed
Ropinirole Hcl	Ropinirole Hcl	67	suppressed
Valsartan	Valsartan	67	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	66	42
Nitrofurantoin	Nitrofurantoin Macrocrystal	66	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	65	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	64	suppressed
Glimepiride	Glimepiride	63	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	63	suppressed
Fenofibrate	Fenofibrate	62	suppressed
Meloxicam	Meloxicam	57	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	56	16
Ramipril	Ramipril	55	suppressed
Calcitriol	Calcitriol	54	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	54	16
Acetazolamide	Acetazolamide	53	suppressed
Benazepril Hcl	Benazepril Hcl	53	suppressed
Tradjenta	Linagliptin	53	suppressed
Cinacalcet Hcl	Cinacalcet Hcl	51	suppressed
Atenolol	Atenolol	50	suppressed
Enalapril Maleate	Enalapril Maleate	48	suppressed
Enoxaparin Sodium	Enoxaparin Sodium	48	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	48	suppressed
Nystatin	Nystatin	48	29
Entresto	Sacubitril/Valsartan	47	suppressed
Labetalol Hcl	Labetalol Hcl	47	suppressed
Sotalol	Sotalol Hcl	47	suppressed
Acetylcysteine	Acetylcysteine	45	15
Albuterol Sulfate Hfa	Albuterol Sulfate	45	22
Hydrocortisone	Hydrocortisone	45	suppressed
Paroxetine Hcl	Paroxetine Hcl	45	suppressed
Azithromycin	Azithromycin	44	22
Fludrocortisone Acetate	Fludrocortisone Acetate	42	suppressed
Kapspargo Sprinkle	Metoprolol Succinate	42	suppressed
Lubiprostone	Lubiprostone	42	suppressed
Chlorthalidone	Chlorthalidone	41	suppressed
Vancomycin Hcl	Vancomycin Hcl	41	suppressed
Pregabalin	Pregabalin	40	suppressed
Rosuvastatin Calcium	Rosuvastatin Calcium	40	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	39	suppressed
Lansoprazole	Lansoprazole	39	suppressed
Meclizine Hcl	Meclizine Hcl	39	suppressed
Sucralfate	Sucralfate	39	suppressed
Albuterol Sulfate	Albuterol Sulfate	38	13
Doxycycline Hyclate	Doxycycline Hyclate	38	25
Levemir Flexpen	Insulin Detemir	38	suppressed
Matzim La	Diltiazem Hcl	38	suppressed
Novolog Flexpen	Insulin Aspart	38	11
Bumetanide	Bumetanide	37	11
Nifedipine Er	Nifedipine	37	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	36	suppressed
Timolol Maleate	Timolol Maleate	36	suppressed
Aripiprazole	Aripiprazole	33	suppressed
Budesonide	Budesonide	33	suppressed
Cholestyramine	Cholestyramine (With Sugar)	32	12
Letrozole	Letrozole	30	suppressed
Lithium Carbonate	Lithium Carbonate	30	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	29	suppressed
Namzaric	Memantine Hcl/Donepezil Hcl	29	suppressed
Soliqua 100-33	Insulin Glargine/Lixisenatide	29	suppressed
Ertapenem	Ertapenem Sodium	28	suppressed
Glipizide Er	Glipizide	28	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	28	suppressed
Procrit	Epoetin Alfa	27	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	27	23
Ciprofloxacin Hcl	Ciprofloxacin Hcl	26	22
Insulin Aspart Flexpen	Insulin Aspart	26	suppressed
Clonazepam	Clonazepam	24	12
Colchicine	Colchicine	24	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	24	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	24	18
Propranolol Hcl	Propranolol Hcl	23	suppressed
Anastrozole	Anastrozole	21	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	21	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	21	suppressed
Morphine Sulfate Er	Morphine Sulfate	21	suppressed
Rytary	Carbidopa/Levodopa	21	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	21	suppressed
Amantadine	Amantadine Hcl	20	suppressed
Carbamazepine	Carbamazepine	20	suppressed
Daptomycin	Daptomycin	20	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	20	suppressed
Lidocaine	Lidocaine	20	suppressed
Lorazepam	Lorazepam	20	suppressed
Dorzolamide Hcl	Dorzolamide Hcl	19	suppressed
Isosorbide Mononitrate	Isosorbide Mononitrate	19	suppressed
Lactulose	Lactulose	19	suppressed
Primidone	Primidone	19	suppressed
Rivastigmine	Rivastigmine	19	suppressed
Tramadol Hcl	Tramadol Hcl	19	suppressed
Bupropion Hcl	Bupropion Hcl	18	suppressed
Divalproex Sodium Er	Divalproex Sodium	18	suppressed
Incruse Ellipta	Umeclidinium Bromide	18	suppressed
Tacrolimus	Tacrolimus	18	suppressed
Tizanidine Hcl	Tizanidine Hcl	18	suppressed
Breo Ellipta	Fluticasone/Vilanterol	17	suppressed
Gemfibrozil	Gemfibrozil	17	suppressed
Benztropine Mesylate	Benztropine Mesylate	16	suppressed
Cefdinir	Cefdinir	16	13
Desmopressin Acetate	Desmopressin Acetate	16	suppressed
Diclofenac Sodium	Diclofenac Sodium	16	13
Haloperidol Decanoate	Haloperidol Decanoate	16	suppressed
Oxcarbazepine	Oxcarbazepine	16	suppressed
Alprazolam	Alprazolam	15	suppressed
Bupropion Hcl Sr	Bupropion Hcl	15	suppressed
Clotrimazole	Clotrimazole	15	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	15	suppressed
Fluconazole	Fluconazole	15	suppressed
Levofloxacin	Levofloxacin	15	11
Linzess	Linaclotide	15	suppressed
Meropenem	Meropenem	15	suppressed
Methenamine Hippurate	Methenamine Hippurate	15	suppressed
Cefuroxime	Cefuroxime Axetil	14	suppressed
Diltiazem 24hr Er (Xr)	Diltiazem Hcl	14	suppressed
Haloperidol	Haloperidol	14	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Lokelma	Sodium Zirconium Cyclosilicate	14	suppressed
Metformin Hcl Er	Metformin Hcl	14	suppressed
Novolog	Insulin Aspart	14	suppressed
Terazosin Hcl	Terazosin Hcl	14	suppressed
Tiotropium Bromide	Tiotropium Bromide	14	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	13	suppressed
Farxiga	Dapagliflozin Propanediol	13	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	13	suppressed
Naproxen	Naproxen	13	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	13	11
Sodium Chloride	0.9 % Sodium Chloride	13	suppressed
Tolterodine Tartrate	Tolterodine Tartrate	13	suppressed
Vascepa	Icosapent Ethyl	13	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	12	suppressed
Dapagliflozin	Dapagliflozin Propanediol	12	suppressed
Invega Sustenna	Paliperidone Palmitate	12	suppressed
Meropenem-0.9% Nacl	Meropenem-0.9% Sodium Chloride	12	suppressed
Nystop	Nystatin	12	suppressed
Pentoxifylline	Pentoxifylline	12	suppressed
Ranolazine Er	Ranolazine	12	suppressed
Topiramate	Topiramate	12	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	11	suppressed
Clozapine	Clozapine	11	suppressed
Diltiazem 12hr Er	Diltiazem Hcl	11	suppressed
Humalog	Insulin Lispro	11	suppressed
Klor-Con 10	Potassium Chloride	11	suppressed
Loperamide	Loperamide Hcl	11	suppressed
Mesalamine	Mesalamine	11	suppressed
Spiriva Handihaler	Tiotropium Bromide	11	suppressed
Verapamil Er	Verapamil Hcl	11	suppressed
Ziprasidone Hcl	Ziprasidone 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