Healthcare provider profile · identity verified

Daniel S Wientzen, DO

Family Practice · DECORAH, IA · NPI 1952417248

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	633	142
Omeprazole	Omeprazole	326	70
Amlodipine Besylate	Amlodipine Besylate	292	74
Levothyroxine Sodium	Levothyroxine Sodium	288	50
Losartan Potassium	Losartan Potassium	278	63
Metoprolol Succinate	Metoprolol Succinate	269	62
Rosuvastatin Calcium	Rosuvastatin Calcium	259	76
Lisinopril	Lisinopril	255	63
Furosemide	Furosemide	233	51
Tamsulosin Hcl	Tamsulosin Hcl	220	49
Metoprolol Tartrate	Metoprolol Tartrate	215	43
Trazodone Hcl	Trazodone Hcl	215	41
Metformin Hcl	Metformin Hcl	207	46
Sertraline Hcl	Sertraline Hcl	175	35
Escitalopram Oxalate	Escitalopram Oxalate	168	28
Gabapentin	Gabapentin	163	30
Simvastatin	Simvastatin	158	27
Allopurinol	Allopurinol	155	36
Hydrochlorothiazide	Hydrochlorothiazide	152	31
Famotidine	Famotidine	133	23
Fluticasone Propionate	Fluticasone Propionate	127	31
Donepezil Hcl	Donepezil Hcl	111	14
Metformin Hcl Er	Metformin Hcl	107	23
Pantoprazole Sodium	Pantoprazole Sodium	101	23
Memantine Hcl	Memantine Hcl	91	suppressed
Warfarin Sodium	Warfarin Sodium	91	17
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	87	22
Eliquis	Apixaban	85	21
Ozempic	Semaglutide	85	16
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	83	15
Breo Ellipta	Fluticasone/Vilanterol	82	13
Lovastatin	Lovastatin	82	17
Bupropion Xl	Bupropion Hcl	78	12
Venlafaxine Hcl Er	Venlafaxine Hcl	72	13
Citalopram Hbr	Citalopram Hydrobromide	71	11
Finasteride	Finasteride	71	15
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	70	14
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	70	13
Potassium Chloride	Potassium Chloride	70	20
Oxybutynin Chloride Er	Oxybutynin Chloride	69	11
Tramadol Hcl	Tramadol Hcl	65	20
Fluoxetine Hcl	Fluoxetine Hcl	63	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	56	25
Xarelto	Rivaroxaban	55	suppressed
Doxycycline Monohydrate	Doxycycline Monohydrate	54	32
Oxycodone Hcl	Oxycodone Hcl	53	11
Lorazepam	Lorazepam	51	15
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	50	suppressed
Prednisone	Prednisone	50	20
Isosorbide Mononitrate Er	Isosorbide Mononitrate	48	suppressed
Jardiance	Empagliflozin	46	suppressed
Clopidogrel	Clopidogrel Bisulfate	45	13
Alendronate Sodium	Alendronate Sodium	44	suppressed
Clonazepam	Clonazepam	43	suppressed
Jantoven	Warfarin Sodium	43	suppressed
Montelukast Sodium	Montelukast Sodium	42	suppressed
Bumetanide	Bumetanide	41	suppressed
Nabumetone	Nabumetone	41	suppressed
Trulicity	Dulaglutide	40	11
Farxiga	Dapagliflozin Propanediol	38	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	38	suppressed
Buspirone Hcl	Buspirone Hcl	36	suppressed
Atenolol	Atenolol	32	suppressed
Benazepril Hcl	Benazepril Hcl	32	suppressed
Ketoconazole	Ketoconazole	32	14
Ramipril	Ramipril	32	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	31	23
Alprazolam	Alprazolam	30	suppressed
Lamotrigine	Lamotrigine	28	suppressed
Glipizide	Glipizide	27	suppressed
Ondansetron Odt	Ondansetron	27	suppressed
Risperidone	Risperidone	27	suppressed
Tizanidine Hcl	Tizanidine Hcl	27	suppressed
Divalproex Sodium	Divalproex Sodium	26	suppressed
Ezetimibe	Ezetimibe	26	suppressed
Aripiprazole	Aripiprazole	25	suppressed
Diltiazem Hcl	Diltiazem Hcl	25	suppressed
Glimepiride	Glimepiride	25	suppressed
Spironolactone	Spironolactone	25	suppressed
Budesonide-Formoterol Fumarate	Budesonide/Formoterol Fumarate	24	suppressed
Pravastatin Sodium	Pravastatin Sodium	24	suppressed
Myrbetriq	Mirabegron	23	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	22	suppressed
Loperamide	Loperamide Hcl	22	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	22	suppressed
Valacyclovir	Valacyclovir Hcl	22	suppressed
Amiodarone Hcl	Amiodarone Hcl	21	suppressed
Pregabalin	Pregabalin	21	suppressed
Betamethasone Dipropionate	Betamethasone Dipropionate	20	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	20	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	20	suppressed
Paroxetine Hcl	Paroxetine Hcl	19	suppressed
Symbicort	Budesonide/Formoterol Fumarate	19	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	19	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	18	suppressed
Ventolin Hfa	Albuterol Sulfate	18	suppressed
Synthroid	Levothyroxine Sodium	17	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	17	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	16	suppressed
Spiriva Respimat	Tiotropium Bromide	16	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	15	suppressed
Januvia	Sitagliptin Phosphate	14	suppressed
Terazosin Hcl	Terazosin Hcl	14	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	13	suppressed
Armodafinil	Armodafinil	13	suppressed
Butalb-Acetaminoph-Caff-Codein	Butalbit/Acetamin/Caff/Codeine	13	suppressed
Cefadroxil	Cefadroxil	13	suppressed
Ibuprofen	Ibuprofen	13	suppressed
Medroxyprogesterone Acetate	Medroxyprogesterone Acetate	13	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	13	suppressed
Trintellix	Vortioxetine Hydrobromide	13	suppressed
Labetalol Hcl	Labetalol Hcl	12	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	12	suppressed
Nitroglycerin	Nitroglycerin	12	11
Spiriva Handihaler	Tiotropium Bromide	12	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	12	suppressed
Celecoxib	Celecoxib	11	suppressed
Dapsone	Dapsone	11	suppressed
Glipizide Er	Glipizide	11	suppressed
Levofloxacin	Levofloxacin	11	suppressed
Meloxicam	Meloxicam	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