Healthcare provider profile · identity verified

Grant E Peterson, MD

Internal Medicine · ANKENY, IA · NPI 1881905370

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	496	152
Amlodipine Besylate	Amlodipine Besylate	314	87
Levothyroxine Sodium	Levothyroxine Sodium	248	61
Losartan Potassium	Losartan Potassium	226	65
Tamsulosin Hcl	Tamsulosin Hcl	188	53
Omeprazole	Omeprazole	183	54
Lisinopril	Lisinopril	158	44
Gabapentin	Gabapentin	128	41
Rosuvastatin Calcium	Rosuvastatin Calcium	125	40
Albuterol Sulfate Hfa	Albuterol Sulfate	115	40
Metoprolol Succinate	Metoprolol Succinate	115	40
Hydrochlorothiazide	Hydrochlorothiazide	113	32
Jardiance	Empagliflozin	113	27
Pantoprazole Sodium	Pantoprazole Sodium	113	34
Duloxetine Hcl	Duloxetine Hcl	108	20
Metformin Hcl	Metformin Hcl	108	32
Oxycodone Hcl	Oxycodone Hcl	103	17
Alendronate Sodium	Alendronate Sodium	100	24
Escitalopram Oxalate	Escitalopram Oxalate	100	30
Eliquis	Apixaban	99	25
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	97	37
Carvedilol	Carvedilol	92	27
Metformin Hcl Er	Metformin Hcl	87	24
Simvastatin	Simvastatin	87	24
Tramadol Hcl	Tramadol Hcl	86	22
Trazodone Hcl	Trazodone Hcl	86	22
Bupropion Xl	Bupropion Hcl	81	17
Allopurinol	Allopurinol	80	18
Zolpidem Tartrate	Zolpidem Tartrate	77	20
Pravastatin Sodium	Pravastatin Sodium	76	23
Furosemide	Furosemide	74	25
Potassium Chloride	Potassium Chloride	74	18
Prednisone	Prednisone	66	36
Venlafaxine Hcl Er	Venlafaxine Hcl	65	suppressed
Ozempic	Semaglutide	64	14
Pregabalin	Pregabalin	63	12
Spironolactone	Spironolactone	62	20
Amitriptyline Hcl	Amitriptyline Hcl	59	18
Mounjaro	Tirzepatide	59	14
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	58	17
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	56	15
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	56	14
Lorazepam	Lorazepam	53	12
Naltrexone Hcl	Naltrexone Hcl	53	11
Finasteride	Finasteride	52	16
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	45	20
Sertraline Hcl	Sertraline Hcl	44	16
Quetiapine Fumarate	Quetiapine Fumarate	43	suppressed
Trulicity	Dulaglutide	43	11
Metoprolol Tartrate	Metoprolol Tartrate	42	13
Meloxicam	Meloxicam	40	16
Chlorthalidone	Chlorthalidone	39	suppressed
Fluticasone Propionate	Fluticasone Propionate	39	22
Tizanidine Hcl	Tizanidine Hcl	38	11
Clonazepam	Clonazepam	36	suppressed
Ondansetron Odt	Ondansetron	35	18
Clopidogrel	Clopidogrel Bisulfate	34	12
Fluoxetine Hcl	Fluoxetine Hcl	34	suppressed
Cephalexin	Cephalexin	32	21
Xarelto	Rivaroxaban	32	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	31	suppressed
Bumetanide	Bumetanide	30	suppressed
Primidone	Primidone	30	suppressed
Alprazolam	Alprazolam	29	suppressed
Buspirone Hcl	Buspirone Hcl	29	suppressed
Naproxen	Naproxen	29	suppressed
Novolog Flexpen	Insulin Aspart	29	suppressed
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	28	suppressed
Famotidine	Famotidine	28	suppressed
Warfarin Sodium	Warfarin Sodium	28	suppressed
Diclofenac Sodium	Diclofenac Sodium	27	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	27	suppressed
Ropinirole Hcl	Ropinirole Hcl	27	suppressed
Paroxetine Hcl	Paroxetine Hcl	25	suppressed
Propranolol Hcl Er	Propranolol Hcl	25	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	24	17
Humalog Kwikpen U-100	Insulin Lispro	23	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	23	suppressed
Hydralazine Hcl	Hydralazine Hcl	22	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	22	suppressed
Donepezil Hcl	Donepezil Hcl	21	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	20	suppressed
Colchicine	Colchicine	20	suppressed
Farxiga	Dapagliflozin Propanediol	20	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	20	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	20	20
Esomeprazole Magnesium	Esomeprazole Magnesium	19	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	19	suppressed
Atenolol	Atenolol	18	suppressed
Benazepril Hcl	Benazepril Hcl	18	suppressed
Clonidine Hcl	Clonidine Hcl	18	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	18	14
Enalapril Maleate	Enalapril Maleate	18	suppressed
Ezetimibe	Ezetimibe	18	suppressed
Lovastatin	Lovastatin	18	suppressed
Montelukast Sodium	Montelukast Sodium	18	suppressed
Topiramate	Topiramate	18	suppressed
Nitroglycerin	Nitroglycerin	17	12
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	17	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	16	suppressed
Lansoprazole	Lansoprazole	16	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	16	suppressed
Mirtazapine	Mirtazapine	15	suppressed
Citalopram Hbr	Citalopram Hydrobromide	14	suppressed
Ipratropium Bromide	Ipratropium Bromide	14	suppressed
Irbesartan	Irbesartan	14	suppressed
Memantine Hcl	Memantine Hcl	14	suppressed
Nystatin	Nystatin	14	suppressed
Amiloride-Hydrochlorothiazide	Amiloride/Hydrochlorothiazide	13	suppressed
Diclofenac Potassium	Diclofenac Potassium	13	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	13	suppressed
Doxepin Hcl	Doxepin Hcl	13	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	13	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	13	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	13	suppressed
Baclofen	Baclofen	12	suppressed
Celecoxib	Celecoxib	12	suppressed
Fluconazole	Fluconazole	12	suppressed
Glimepiride	Glimepiride	12	suppressed
Ibuprofen	Ibuprofen	12	suppressed
Linzess	Linaclotide	12	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	12	suppressed
Spiriva Handihaler	Tiotropium Bromide	12	suppressed
Tramadol Hcl Er	Tramadol Hcl	12	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	11	suppressed
Glipizide Er	Glipizide	11	suppressed
Hydromorphone Er	Hydromorphone Hcl	11	suppressed
Repatha Sureclick	Evolocumab	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