Healthcare provider profile · identity verified

Daniel E Feddersen, MD

Family Practice · AMES, IA · NPI 1932197951

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	777	201
Levothyroxine Sodium	Levothyroxine Sodium	506	112
Amlodipine Besylate	Amlodipine Besylate	440	111
Simvastatin	Simvastatin	367	92
Omeprazole	Omeprazole	322	83
Losartan Potassium	Losartan Potassium	302	75
Tamsulosin Hcl	Tamsulosin Hcl	277	75
Lisinopril	Lisinopril	274	74
Hydrochlorothiazide	Hydrochlorothiazide	273	74
Metoprolol Succinate	Metoprolol Succinate	258	67
Metformin Hcl	Metformin Hcl	246	68
Glipizide Er	Glipizide	161	42
Valsartan	Valsartan	161	43
Sertraline Hcl	Sertraline Hcl	156	38
Furosemide	Furosemide	155	45
Gabapentin	Gabapentin	155	28
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	140	36
Atenolol	Atenolol	130	29
Alendronate Sodium	Alendronate Sodium	129	32
Rosuvastatin Calcium	Rosuvastatin Calcium	113	32
Allopurinol	Allopurinol	112	27
Donepezil Hcl	Donepezil Hcl	108	24
Metoprolol Tartrate	Metoprolol Tartrate	104	30
Potassium Chloride	Potassium Chloride	101	23
Prednisone	Prednisone	96	56
Pantoprazole Sodium	Pantoprazole Sodium	95	29
Metformin Hcl Er	Metformin Hcl	93	21
Escitalopram Oxalate	Escitalopram Oxalate	92	23
Eliquis	Apixaban	89	20
Jardiance	Empagliflozin	83	20
Trazodone Hcl	Trazodone Hcl	83	18
Warfarin Sodium	Warfarin Sodium	68	17
Albuterol Sulfate Hfa	Albuterol Sulfate	67	35
Finasteride	Finasteride	66	19
Venlafaxine Hcl Er	Venlafaxine Hcl	61	15
Citalopram Hbr	Citalopram Hydrobromide	59	15
Glipizide	Glipizide	55	17
Fluoxetine Hcl	Fluoxetine Hcl	54	12
Clopidogrel	Clopidogrel Bisulfate	53	15
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	53	19
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	50	14
Ozempic	Semaglutide	49	suppressed
Tramadol Hcl	Tramadol Hcl	48	12
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	48	13
Carvedilol	Carvedilol	47	15
Montelukast Sodium	Montelukast Sodium	45	11
Triamcinolone Acetonide	Triamcinolone Acetonide	45	27
Pravastatin Sodium	Pravastatin Sodium	44	11
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	44	13
Bupropion Xl	Bupropion Hcl	42	11
Meloxicam	Meloxicam	41	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	39	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	39	33
Zolpidem Tartrate	Zolpidem Tartrate	39	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	38	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	38	suppressed
Clonidine Hcl	Clonidine Hcl	37	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	36	suppressed
Fenofibrate	Fenofibrate,micronized	34	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	34	19
Baclofen	Baclofen	33	suppressed
Benazepril Hcl	Benazepril Hcl	32	suppressed
Fluticasone Propionate	Fluticasone Propionate	32	11
Spironolactone	Spironolactone	32	suppressed
Mirtazapine	Mirtazapine	31	suppressed
Xarelto	Rivaroxaban	31	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	30	28
Cephalexin	Cephalexin	30	23
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	29	suppressed
Memantine Hcl	Memantine Hcl	28	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	27	suppressed
Clonazepam	Clonazepam	26	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	26	suppressed
Amoxicillin	Amoxicillin	25	14
Ezetimibe	Ezetimibe	25	suppressed
Nabumetone	Nabumetone	25	suppressed
Ondansetron Odt	Ondansetron	25	suppressed
Trulicity	Dulaglutide	25	suppressed
Duloxetine Hcl	Duloxetine Hcl	23	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	23	22
Arnuity Ellipta	Fluticasone Furoate	22	suppressed
Cholestyramine Light	Cholestyramine	22	suppressed
Naproxen	Naproxen	22	suppressed
Ramipril	Ramipril	22	suppressed
Ropinirole Hcl	Ropinirole Hcl	22	suppressed
Bumetanide	Bumetanide	21	suppressed
Irbesartan	Irbesartan	21	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	21	suppressed
Buspirone Hcl	Buspirone Hcl	20	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	20	15
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	20	suppressed
Synthroid	Levothyroxine Sodium	20	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	19	16
Risperidone	Risperidone	19	suppressed
Amiodarone Hcl	Amiodarone Hcl	18	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	18	suppressed
Metolazone	Metolazone	18	suppressed
Paroxetine Hcl	Paroxetine Hcl	18	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	18	suppressed
Mounjaro	Tirzepatide	17	suppressed
Terazosin Hcl	Terazosin Hcl	17	suppressed
Cholestyramine	Cholestyramine (With Sugar)	16	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	16	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	16	suppressed
Azithromycin	Azithromycin	15	15
Combivent Respimat	Ipratropium/Albuterol Sulfate	15	suppressed
Januvia	Sitagliptin Phosphate	15	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	15	suppressed
Propranolol Hcl Er	Propranolol Hcl	15	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	15	suppressed
Latanoprost	Latanoprost	14	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	14	suppressed
Nitroglycerin	Nitroglycerin	14	12
Valacyclovir	Valacyclovir Hcl	14	suppressed
Aripiprazole	Aripiprazole	13	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	13	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	13	suppressed
Lansoprazole	Lansoprazole	13	suppressed
Metaxalone	Metaxalone	13	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	12	suppressed
Celecoxib	Celecoxib	12	suppressed
Enalapril Maleate	Enalapril Maleate	12	suppressed
Famotidine	Famotidine	12	suppressed
Gemfibrozil	Gemfibrozil	12	suppressed
Levofloxacin	Levofloxacin	12	12
Propranolol Hcl	Propranolol Hcl	12	suppressed
Soliqua 100-33	Insulin Glargine/Lixisenatide	12	suppressed
Tresiba Flextouch U-100	Insulin Degludec	12	suppressed
Verapamil Er	Verapamil Hcl	12	suppressed
Betamethasone Dipropionate	Betamethasone Dipropionate	11	suppressed
Sildenafil Citrate	Sildenafil Citrate	11	suppressed
Temazepam	Temazepam	11	suppressed
Trospium Chloride	Trospium Chloride	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

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