Healthcare provider profile · identity verified

Shannon C Throndson, MD

Family Practice · HIAWATHA, IA · NPI 1982682621

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	595	162
Levothyroxine Sodium	Levothyroxine Sodium	539	143
Omeprazole	Omeprazole	338	92
Lisinopril	Lisinopril	311	87
Amlodipine Besylate	Amlodipine Besylate	250	67
Simvastatin	Simvastatin	229	62
Rosuvastatin Calcium	Rosuvastatin Calcium	220	63
Metoprolol Succinate	Metoprolol Succinate	202	54
Losartan Potassium	Losartan Potassium	197	59
Metformin Hcl Er	Metformin Hcl	197	55
Gabapentin	Gabapentin	193	57
Furosemide	Furosemide	188	50
Alendronate Sodium	Alendronate Sodium	175	48
Hydrochlorothiazide	Hydrochlorothiazide	151	43
Sertraline Hcl	Sertraline Hcl	143	40
Bupropion Xl	Bupropion Hcl	119	29
Pantoprazole Sodium	Pantoprazole Sodium	113	30
Metformin Hcl	Metformin Hcl	110	26
Albuterol Sulfate Hfa	Albuterol Sulfate	108	33
Atenolol	Atenolol	108	30
Escitalopram Oxalate	Escitalopram Oxalate	105	28
Trazodone Hcl	Trazodone Hcl	105	33
Ozempic	Semaglutide	101	22
Famotidine	Famotidine	98	37
Lorazepam	Lorazepam	92	32
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	89	15
Potassium Chloride	Potassium Chloride	88	24
Tramadol Hcl	Tramadol Hcl	86	30
Duloxetine Hcl	Duloxetine Hcl	85	17
Montelukast Sodium	Montelukast Sodium	82	24
Glipizide Er	Glipizide	77	24
Fluticasone Propionate	Fluticasone Propionate	74	25
Pravastatin Sodium	Pravastatin Sodium	74	23
Jardiance	Empagliflozin	72	20
Citalopram Hbr	Citalopram Hydrobromide	71	19
Metoprolol Tartrate	Metoprolol Tartrate	68	19
Allopurinol	Allopurinol	66	18
Prednisone	Prednisone	65	51
Fluoxetine Hcl	Fluoxetine Hcl	57	14
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	56	24
Meloxicam	Meloxicam	55	25
Alprazolam	Alprazolam	52	16
Zolpidem Tartrate	Zolpidem Tartrate	52	23
Clopidogrel	Clopidogrel Bisulfate	48	16
Fenofibrate	Fenofibrate	48	13
Estradiol	Estradiol	47	12
Paroxetine Hcl	Paroxetine Hcl	47	14
Oxybutynin Chloride Er	Oxybutynin Chloride	46	16
Tamsulosin Hcl	Tamsulosin Hcl	45	15
Venlafaxine Hcl Er	Venlafaxine Hcl	45	12
Ventolin Hfa	Albuterol Sulfate	45	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	44	13
Ropinirole Hcl	Ropinirole Hcl	44	16
Synthroid	Levothyroxine Sodium	44	12
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	37	11
Doxycycline Monohydrate	Doxycycline Monohydrate	35	32
Pregabalin	Pregabalin	35	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	33	32
Glipizide	Glipizide	31	11
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	31	12
Propranolol Hcl	Propranolol Hcl	30	suppressed
Xarelto	Rivaroxaban	29	suppressed
Amoxicillin	Amoxicillin	28	16
Breo Ellipta	Fluticasone/Vilanterol	28	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	28	11
Januvia	Sitagliptin Phosphate	28	suppressed
Gemfibrozil	Gemfibrozil	27	suppressed
Oxycodone Hcl	Oxycodone Hcl	27	suppressed
Buspirone Hcl	Buspirone Hcl	26	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	25	suppressed
Diclofenac Sodium	Diclofenac Sodium	25	11
Spironolactone	Spironolactone	25	suppressed
Ondansetron Odt	Ondansetron	24	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	24	suppressed
Finasteride	Finasteride	23	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	23	suppressed
Trulicity	Dulaglutide	23	suppressed
Benazepril Hcl	Benazepril Hcl	22	suppressed
Ibuprofen	Ibuprofen	22	suppressed
Lansoprazole	Lansoprazole	22	suppressed
Mirtazapine	Mirtazapine	22	suppressed
Eliquis	Apixaban	21	suppressed
Valacyclovir	Valacyclovir Hcl	21	12
Warfarin Sodium	Warfarin Sodium	21	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	20	suppressed
Topiramate	Topiramate	20	suppressed
Carvedilol	Carvedilol	19	suppressed
Donepezil Hcl	Donepezil Hcl	19	suppressed
Glimepiride	Glimepiride	19	suppressed
Mounjaro	Tirzepatide	19	suppressed
Nystatin	Nystatin	19	suppressed
Cephalexin	Cephalexin	18	15
Enalapril Maleate	Enalapril Maleate	18	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	17	11
Ondansetron Hcl	Ondansetron Hcl	16	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	15	12
Memantine Hcl	Memantine Hcl	15	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	14	suppressed
Azelastine Hcl	Azelastine Hcl	14	suppressed
Betamethasone Valerate	Betamethasone Valerate	14	suppressed
Tizanidine Hcl	Tizanidine Hcl	14	suppressed
Valsartan	Valsartan	14	suppressed
Acyclovir	Acyclovir	13	suppressed
Azithromycin	Azithromycin	13	suppressed
Ezetimibe	Ezetimibe	13	suppressed
Fluconazole	Fluconazole	13	11
Bisoprolol Fumarate	Bisoprolol Fumarate	12	suppressed
Clindamycin Hcl	Clindamycin Hcl	12	suppressed
Clobetasol Propionate	Clobetasol Propionate	12	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	12	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	12	suppressed
Verapamil Er	Verapamil Hcl	12	suppressed
Diazepam	Diazepam	11	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	11	suppressed
Farxiga	Dapagliflozin Propanediol	11	suppressed
Metoclopramide Hcl	Metoclopramide Hcl	11	suppressed
Midodrine Hcl	Midodrine Hcl	11	suppressed
Myrbetriq	Mirabegron	11	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	11	suppressed
Propranolol Hcl Er	Propranolol Hcl	11	suppressed
Solifenacin Succinate	Solifenacin Succinate	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