Healthcare provider profile · identity verified

Thomas E Ferk, D.O.

Family Practice · WISCONSIN RAPIDS, WI · NPI 1407880602

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	660	198
Lisinopril	Lisinopril	437	108
Amlodipine Besylate	Amlodipine Besylate	424	107
Omeprazole	Omeprazole	382	111
Metoprolol Succinate	Metoprolol Succinate	365	99
Levothyroxine Sodium	Levothyroxine Sodium	242	63
Losartan Potassium	Losartan Potassium	238	73
Gabapentin	Gabapentin	235	56
Rosuvastatin Calcium	Rosuvastatin Calcium	233	68
Duloxetine Hcl	Duloxetine Hcl	218	53
Furosemide	Furosemide	212	61
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	208	26
Metformin Hcl Er	Metformin Hcl	178	50
Allopurinol	Allopurinol	177	42
Pravastatin Sodium	Pravastatin Sodium	167	46
Trazodone Hcl	Trazodone Hcl	162	45
Hydrochlorothiazide	Hydrochlorothiazide	161	52
Tamsulosin Hcl	Tamsulosin Hcl	161	51
Albuterol Sulfate Hfa	Albuterol Sulfate	155	66
Potassium Chloride	Potassium Chloride	150	42
Pantoprazole Sodium	Pantoprazole Sodium	139	44
Tramadol Hcl	Tramadol Hcl	133	25
Metformin Hcl	Metformin Hcl	132	38
Metoprolol Tartrate	Metoprolol Tartrate	128	40
Jardiance	Empagliflozin	122	28
Simvastatin	Simvastatin	115	33
Warfarin Sodium	Warfarin Sodium	114	29
Ozempic	Semaglutide	113	23
Eliquis	Apixaban	106	26
Famotidine	Famotidine	97	30
Citalopram Hbr	Citalopram Hydrobromide	91	24
Sertraline Hcl	Sertraline Hcl	91	23
Prednisone	Prednisone	90	54
Tizanidine Hcl	Tizanidine Hcl	90	19
Alendronate Sodium	Alendronate Sodium	87	23
Clopidogrel	Clopidogrel Bisulfate	86	24
Diclofenac Sodium	Diclofenac Sodium	83	32
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	82	20
Mounjaro	Tirzepatide	81	17
Fluticasone Propionate	Fluticasone Propionate	78	44
Lorazepam	Lorazepam	78	16
Finasteride	Finasteride	76	20
Trulicity	Dulaglutide	68	11
Atenolol	Atenolol	67	21
Montelukast Sodium	Montelukast Sodium	65	20
Irbesartan	Irbesartan	63	16
Hydroxyzine Hcl	Hydroxyzine Hcl	61	13
Carvedilol	Carvedilol	60	16
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	60	19
Amitriptyline Hcl	Amitriptyline Hcl	59	17
Glimepiride	Glimepiride	51	12
Valsartan	Valsartan	50	14
Bupropion Xl	Bupropion Hcl	49	14
Spironolactone	Spironolactone	49	18
Azithromycin	Azithromycin	48	31
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	48	31
Chlorthalidone	Chlorthalidone	47	12
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	46	suppressed
Alprazolam	Alprazolam	45	suppressed
Meloxicam	Meloxicam	42	13
Fluoxetine Hcl	Fluoxetine Hcl	41	11
Synthroid	Levothyroxine Sodium	40	suppressed
Donepezil Hcl	Donepezil Hcl	39	suppressed
Amoxicillin	Amoxicillin	38	18
Venlafaxine Hcl Er	Venlafaxine Hcl	38	suppressed
Bumetanide	Bumetanide	37	suppressed
Ezetimibe	Ezetimibe	37	11
Triamcinolone Acetonide	Triamcinolone Acetonide	37	25
Doxycycline Monohydrate	Doxycycline Monohydrate	35	28
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	35	suppressed
Cephalexin	Cephalexin	34	21
Buspirone Hcl	Buspirone Hcl	32	suppressed
Methylprednisolone	Methylprednisolone	32	25
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	31	suppressed
Mirtazapine	Mirtazapine	31	suppressed
Baclofen	Baclofen	30	suppressed
Pregabalin	Pregabalin	30	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	29	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	29	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	27	suppressed
Propranolol Hcl Er	Propranolol Hcl	27	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	26	11
Ropinirole Hcl	Ropinirole Hcl	26	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	25	22
Verapamil Er	Verapamil Hcl	25	suppressed
Cefdinir	Cefdinir	24	19
Klor-Con M20	Potassium Chloride	24	12
Zolpidem Tartrate	Zolpidem Tartrate	24	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	23	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	23	suppressed
Vitamin D2	Ergocalciferol (Vitamin D2)	23	suppressed
Lansoprazole	Lansoprazole	22	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	22	suppressed
Symbicort	Budesonide/Formoterol Fumarate	22	12
Xarelto	Rivaroxaban	22	suppressed
Nystatin	Nystatin	21	12
Ondansetron Odt	Ondansetron	21	14
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	21	suppressed
Hydrocortisone	Hydrocortisone	20	suppressed
Loperamide	Loperamide Hcl	20	suppressed
Rybelsus	Semaglutide	20	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	19	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	18	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	18	suppressed
Glipizide Er	Glipizide	18	suppressed
Meclizine Hcl	Meclizine Hcl	18	11
Paroxetine Hcl	Paroxetine Hcl	18	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	18	12
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	17	suppressed
Memantine Hcl	Memantine Hcl	17	suppressed
Bupropion Hcl Sr	Bupropion Hcl	16	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	16	suppressed
Fluconazole	Fluconazole	16	suppressed
Clonidine Hcl	Clonidine Hcl	15	suppressed
Glipizide	Glipizide	15	suppressed
Ibuprofen	Ibuprofen	15	suppressed
Nitroglycerin	Nitroglycerin	15	11
Oxycodone Hcl	Oxycodone Hcl	15	suppressed
Spiriva Handihaler	Tiotropium Bromide	15	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	15	suppressed
Valacyclovir	Valacyclovir Hcl	15	suppressed
Armour Thyroid	Thyroid,pork	14	suppressed
Breo Ellipta	Fluticasone/Vilanterol	14	suppressed
Fondaparinux Sodium	Fondaparinux Sodium	14	suppressed
Gemfibrozil	Gemfibrozil	14	suppressed
Lamotrigine	Lamotrigine	14	suppressed
Boostrix Tdap	Diphth,pertuss(Acell),tet Vac	13	13
Genvoya	Elviteg/Cob/Emtri/Tenof Alafen	13	suppressed
Morphine Sulfate Er	Morphine Sulfate	13	suppressed
Nexium	Esomeprazole Magnesium	13	suppressed
Clobetasol Propionate	Clobetasol Propionate	12	suppressed
Humalog Kwikpen U-100	Insulin Lispro	12	suppressed
Ketoconazole	Ketoconazole	12	suppressed
Levetiracetam	Levetiracetam	12	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	12	suppressed
Sucralfate	Sucralfate	12	suppressed
Toujeo Max Solostar	Insulin Glargine,hum.Rec.Anlog	12	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	12	suppressed
Acyclovir	Acyclovir	11	suppressed
Benazepril Hcl	Benazepril Hcl	11	suppressed
Estradiol	Estradiol	11	suppressed
Farxiga	Dapagliflozin Propanediol	11	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	11	suppressed
Levalbuterol Tartrate Hfa	Levalbuterol Tartrate	11	suppressed
Terazosin Hcl	Terazosin 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