Healthcare provider profile · identity verified

John W Karesh, MD

Internal Medicine · OSWEGO, IL · NPI 1932127917

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	600	170
Lisinopril	Lisinopril	428	122
Levothyroxine Sodium	Levothyroxine Sodium	417	81
Amlodipine Besylate	Amlodipine Besylate	406	105
Losartan Potassium	Losartan Potassium	388	104
Metformin Hcl	Metformin Hcl	318	90
Gabapentin	Gabapentin	287	73
Metoprolol Succinate	Metoprolol Succinate	276	74
Pantoprazole Sodium	Pantoprazole Sodium	263	78
Omeprazole	Omeprazole	242	67
Tamsulosin Hcl	Tamsulosin Hcl	230	64
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	222	67
Hydrochlorothiazide	Hydrochlorothiazide	205	56
Simvastatin	Simvastatin	184	48
Alprazolam	Alprazolam	175	50
Allopurinol	Allopurinol	169	40
Furosemide	Furosemide	159	49
Pravastatin Sodium	Pravastatin Sodium	139	37
Eliquis	Apixaban	128	30
Rosuvastatin Calcium	Rosuvastatin Calcium	126	37
Clopidogrel	Clopidogrel Bisulfate	124	36
Sertraline Hcl	Sertraline Hcl	124	33
Zolpidem Tartrate	Zolpidem Tartrate	124	30
Glipizide	Glipizide	115	35
Alendronate Sodium	Alendronate Sodium	110	27
Metoprolol Tartrate	Metoprolol Tartrate	109	30
Atenolol	Atenolol	106	30
Citalopram Hbr	Citalopram Hydrobromide	104	25
Trazodone Hcl	Trazodone Hcl	100	24
Doxazosin Mesylate	Doxazosin Mesylate	99	26
Prednisone	Prednisone	87	52
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	86	23
Meloxicam	Meloxicam	86	29
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	85	23
Potassium Chloride	Potassium Chloride	85	21
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	84	23
Tramadol Hcl	Tramadol Hcl	83	29
Lovastatin	Lovastatin	77	17
Donepezil Hcl	Donepezil Hcl	75	22
Famotidine	Famotidine	75	15
Fluoxetine Hcl	Fluoxetine Hcl	72	16
Fluticasone Propionate	Fluticasone Propionate	71	21
Baclofen	Baclofen	69	28
Azithromycin	Azithromycin	65	55
Warfarin Sodium	Warfarin Sodium	65	17
Metformin Hcl Er	Metformin Hcl	64	18
Jardiance	Empagliflozin	63	11
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	60	49
Enalapril Maleate	Enalapril Maleate	60	16
Albuterol Sulfate Hfa	Albuterol Sulfate	58	30
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	58	51
Carvedilol	Carvedilol	55	19
Pioglitazone Hcl	Pioglitazone Hcl	55	16
Escitalopram Oxalate	Escitalopram Oxalate	54	15
Lorazepam	Lorazepam	52	suppressed
Clonazepam	Clonazepam	51	suppressed
Meclizine Hcl	Meclizine Hcl	47	15
Montelukast Sodium	Montelukast Sodium	47	suppressed
Xarelto	Rivaroxaban	46	12
Glimepiride	Glimepiride	44	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	43	11
Nifedipine Er	Nifedipine	43	12
Finasteride	Finasteride	42	suppressed
Diazepam	Diazepam	41	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	40	21
Diclofenac Sodium	Diclofenac Sodium	39	16
Glipizide Er	Glipizide	39	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	38	suppressed
Lansoprazole	Lansoprazole	37	suppressed
Paroxetine Hcl	Paroxetine Hcl	37	13
Ozempic	Semaglutide	36	suppressed
Propranolol Hcl	Propranolol Hcl	35	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	33	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	31	27
Duloxetine Hcl	Duloxetine Hcl	31	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	30	suppressed
Tizanidine Hcl	Tizanidine Hcl	30	13
Gemfibrozil	Gemfibrozil	26	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	26	12
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	25	12
Paxlovid	Nirmatrelvir/Ritonavir	25	25
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	24	suppressed
Celecoxib	Celecoxib	24	suppressed
Cephalexin	Cephalexin	23	13
Bupropion Xl	Bupropion Hcl	22	suppressed
Valsartan	Valsartan	22	suppressed
Mounjaro	Tirzepatide	21	suppressed
Synthroid	Levothyroxine Sodium	21	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	20	suppressed
Memantine Hcl	Memantine Hcl	20	suppressed
Farxiga	Dapagliflozin Propanediol	19	suppressed
Ondansetron Odt	Ondansetron	19	11
Spironolactone	Spironolactone	19	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	18	suppressed
Ibuprofen	Ibuprofen	17	suppressed
Methylprednisolone	Methylprednisolone	17	16
Mirtazapine	Mirtazapine	17	suppressed
Nystatin	Nystatin	17	12
Raloxifene Hcl	Raloxifene Hcl	17	suppressed
Colchicine	Colchicine	16	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	16	suppressed
Fenofibrate	Fenofibrate	16	suppressed
Irbesartan	Irbesartan	16	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	16	suppressed
Ropinirole Hcl	Ropinirole Hcl	16	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	16	suppressed
Verapamil Er	Verapamil Hcl	16	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	15	suppressed
Fluticasone Propionate Hfa	Fluticasone Propionate	15	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	15	suppressed
Januvia	Sitagliptin Phosphate	15	suppressed
Midodrine Hcl	Midodrine Hcl	15	suppressed
Benazepril Hcl	Benazepril Hcl	14	suppressed
Carbamazepine	Carbamazepine	14	suppressed
Clonidine Hcl	Clonidine Hcl	14	suppressed
Estradiol	Estradiol	14	suppressed
Glyburide	Glyburide	14	suppressed
Hydralazine Hcl	Hydralazine Hcl	14	suppressed
Levetiracetam	Levetiracetam	14	suppressed
Ondansetron Hcl	Ondansetron Hcl	14	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	14	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	13	suppressed
Dropsafe Prep Pads	Alcohol Antiseptic Pads	13	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	13	suppressed
Fluticasone-Salmeterol Hfa	Fluticasone Propion/Salmeterol	13	suppressed
Novolog Flexpen	Insulin Aspart	13	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	13	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	13	suppressed
Rytary	Carbidopa/Levodopa	13	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	13	13
Terazosin Hcl	Terazosin Hcl	13	suppressed
Topiramate	Topiramate	13	suppressed
Bumetanide	Bumetanide	12	suppressed
Carisoprodol	Carisoprodol	12	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	12	12
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	12	suppressed
Methimazole	Methimazole	12	suppressed
Sildenafil Citrate	Sildenafil Citrate	12	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	12	suppressed
Amoxicillin	Amoxicillin	11	suppressed
Arnuity Ellipta	Fluticasone Furoate	11	suppressed
Azelastine Hcl	Azelastine Hcl	11	suppressed
Methocarbamol	Methocarbamol	11	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	11	suppressed
Tresiba Flextouch U-100	Insulin Degludec	11	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	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