Healthcare provider profile · identity verified

Jay B Knaak, M.D.

Family Practice · INTERNATIONAL FALLS, MN · NPI 1902819626

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	291	56
Metoprolol Succinate	Metoprolol Succinate	223	51
Rosuvastatin Calcium	Rosuvastatin Calcium	181	49
Omeprazole	Omeprazole	177	35
Tramadol Hcl	Tramadol Hcl	163	30
Meloxicam	Meloxicam	162	50
Amlodipine Besylate	Amlodipine Besylate	161	43
Losartan Potassium	Losartan Potassium	151	33
Furosemide	Furosemide	147	33
Metformin Hcl Er	Metformin Hcl	117	24
Tamsulosin Hcl	Tamsulosin Hcl	115	31
Lisinopril	Lisinopril	113	26
Escitalopram Oxalate	Escitalopram Oxalate	103	22
Hydrochlorothiazide	Hydrochlorothiazide	100	20
Potassium Chloride	Potassium Chloride	84	17
Duloxetine Hcl	Duloxetine Hcl	83	15
Ozempic	Semaglutide	83	13
Atenolol	Atenolol	81	17
Atorvastatin Calcium	Atorvastatin Calcium	80	21
Pantoprazole Sodium	Pantoprazole Sodium	79	17
Liothyronine Sodium	Liothyronine Sodium	76	14
Simvastatin	Simvastatin	75	15
Gabapentin	Gabapentin	73	16
Sertraline Hcl	Sertraline Hcl	71	19
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	66	suppressed
Clopidogrel	Clopidogrel Bisulfate	62	15
Irbesartan	Irbesartan	62	11
Lorazepam	Lorazepam	60	18
Glimepiride	Glimepiride	58	14
Zolpidem Tartrate	Zolpidem Tartrate	57	12
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	55	55
Warfarin Sodium	Warfarin Sodium	55	13
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	53	14
Pregabalin	Pregabalin	53	suppressed
Trazodone Hcl	Trazodone Hcl	53	14
Bupropion Xl	Bupropion Hcl	52	15
Ondansetron Odt	Ondansetron	51	11
Famotidine	Famotidine	50	12
Methocarbamol	Methocarbamol	50	suppressed
Clonazepam	Clonazepam	49	suppressed
Spironolactone	Spironolactone	48	12
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	47	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	46	33
Ibuprofen	Ibuprofen	45	suppressed
Tizanidine Hcl	Tizanidine Hcl	44	14
Xarelto	Rivaroxaban	44	11
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	43	12
Prednisone	Prednisone	43	22
Albuterol Sulfate Hfa	Albuterol Sulfate	42	17
Myrbetriq	Mirabegron	42	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	41	suppressed
Allopurinol	Allopurinol	40	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	39	suppressed
Finasteride	Finasteride	38	11
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	38	suppressed
Torsemide	Torsemide	37	suppressed
Azithromycin	Azithromycin	35	18
Chlorthalidone	Chlorthalidone	34	suppressed
Eliquis	Apixaban	34	suppressed
Levetiracetam	Levetiracetam	34	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	34	16
Buspirone Hcl	Buspirone Hcl	33	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	33	13
Donepezil Hcl	Donepezil Hcl	32	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	32	suppressed
Valsartan	Valsartan	31	suppressed
Latanoprost	Latanoprost	30	suppressed
Metformin Hcl	Metformin Hcl	30	suppressed
Celecoxib	Celecoxib	28	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	28	suppressed
Ventolin Hfa	Albuterol Sulfate	28	13
Doxycycline Hyclate	Doxycycline Hyclate	26	13
Methadone Hcl	Methadone Hcl	26	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	25	suppressed
Oxycodone Hcl	Oxycodone Hcl	25	11
Synthroid	Levothyroxine Sodium	25	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	24	suppressed
Jardiance	Empagliflozin	24	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	24	suppressed
Ropinirole Hcl	Ropinirole Hcl	24	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	23	suppressed
Colchicine	Colchicine	22	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	22	suppressed
Carvedilol	Carvedilol	21	suppressed
Methimazole	Methimazole	21	suppressed
Propranolol Hcl Er	Propranolol Hcl	21	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	21	12
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	21	suppressed
Metoprolol Tartrate	Metoprolol Tartrate	20	suppressed
Novolog Flexpen	Insulin Aspart	20	suppressed
Estradiol	Estradiol	19	suppressed
Risperidone	Risperidone	19	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	19	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	18	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	18	suppressed
Citalopram Hbr	Citalopram Hydrobromide	17	suppressed
Dextroamphetamine-Amphet Er	Dextroamphetamine/Amphetamine	17	suppressed
Fluticasone Propionate	Fluticasone Propionate	17	suppressed
Jantoven	Warfarin Sodium	17	suppressed
Atenolol-Chlorthalidone	Atenolol/Chlorthalidone	16	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	16	suppressed
Ketorolac Tromethamine	Ketorolac Tromethamine	16	suppressed
Montelukast Sodium	Montelukast Sodium	15	suppressed
Alendronate Sodium	Alendronate Sodium	14	suppressed
Valacyclovir	Valacyclovir Hcl	14	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	13	suppressed
Budesonide Ec	Budesonide	13	suppressed
Methylprednisolone	Methylprednisolone	13	suppressed
Pentoxifylline	Pentoxifylline	13	suppressed
Bydureon Bcise	Exenatide Microspheres	12	suppressed
Diclofenac Sodium	Diclofenac Sodium	12	suppressed
Divalproex Sodium	Divalproex Sodium	12	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	12	suppressed
Nitroglycerin	Nitroglycerin	12	suppressed
Phenobarbital	Phenobarbital	12	suppressed
Zonisamide	Zonisamide	12	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	11	suppressed
Aripiprazole	Aripiprazole	11	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	11	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	11	suppressed
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	11	suppressed
Dexlansoprazole Dr	Dexlansoprazole	11	suppressed
Entresto	Sacubitril/Valsartan	11	suppressed
Febuxostat	Febuxostat	11	suppressed
Minocycline Hcl	Minocycline Hcl	11	suppressed
Ultra-Fine Short 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