Healthcare provider profile · identity verified

John A Carstensen, MD

Internal Medicine · DES MOINES, IA · NPI 1851378012

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	664	180
Amlodipine Besylate	Amlodipine Besylate	297	80
Levothyroxine Sodium	Levothyroxine Sodium	277	72
Losartan Potassium	Losartan Potassium	262	73
Omeprazole	Omeprazole	199	52
Lisinopril	Lisinopril	186	47
Pantoprazole Sodium	Pantoprazole Sodium	182	48
Ozempic	Semaglutide	178	36
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	176	46
Gabapentin	Gabapentin	151	41
Metoprolol Succinate	Metoprolol Succinate	150	45
Tramadol Hcl	Tramadol Hcl	149	46
Simvastatin	Simvastatin	146	41
Tamsulosin Hcl	Tamsulosin Hcl	140	43
Zolpidem Tartrate	Zolpidem Tartrate	136	34
Duloxetine Hcl	Duloxetine Hcl	121	30
Rosuvastatin Calcium	Rosuvastatin Calcium	118	29
Albuterol Sulfate Hfa	Albuterol Sulfate	108	35
Pregabalin	Pregabalin	104	16
Eliquis	Apixaban	98	19
Spironolactone	Spironolactone	98	24
Metformin Hcl Er	Metformin Hcl	97	30
Sertraline Hcl	Sertraline Hcl	93	21
Allopurinol	Allopurinol	92	21
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	92	20
Hydralazine Hcl	Hydralazine Hcl	90	23
Hydrochlorothiazide	Hydrochlorothiazide	90	25
Furosemide	Furosemide	89	32
Jardiance	Empagliflozin	87	18
Trazodone Hcl	Trazodone Hcl	86	26
Benazepril Hcl	Benazepril Hcl	85	21
Metformin Hcl	Metformin Hcl	85	22
Alendronate Sodium	Alendronate Sodium	78	21
Pravastatin Sodium	Pravastatin Sodium	75	18
Venlafaxine Hcl Er	Venlafaxine Hcl	74	12
Clopidogrel	Clopidogrel Bisulfate	73	16
Celecoxib	Celecoxib	71	19
Clonazepam	Clonazepam	69	16
Pioglitazone Hcl	Pioglitazone Hcl	69	14
Lorazepam	Lorazepam	68	30
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	67	15
Metoprolol Tartrate	Metoprolol Tartrate	65	14
Montelukast Sodium	Montelukast Sodium	62	19
Oxycodone Hcl	Oxycodone Hcl	62	17
Escitalopram Oxalate	Escitalopram Oxalate	61	15
Tizanidine Hcl	Tizanidine Hcl	61	20
Carvedilol	Carvedilol	58	14
Finasteride	Finasteride	57	16
Mounjaro	Tirzepatide	56	11
Bupropion Xl	Bupropion Hcl	55	16
Estradiol	Estradiol	54	11
Meloxicam	Meloxicam	54	19
Doxycycline Hyclate	Doxycycline Hyclate	51	33
Famotidine	Famotidine	51	suppressed
Potassium Chloride	Potassium Chloride	50	19
Citalopram Hbr	Citalopram Hydrobromide	49	13
Warfarin Sodium	Warfarin Sodium	40	12
Desvenlafaxine Succinate Er	Desvenlafaxine Succinate	39	suppressed
Alprazolam	Alprazolam	37	12
Synthroid	Levothyroxine Sodium	37	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	36	11
Ondansetron Odt	Ondansetron	36	14
Testosterone Cypionate	Testosterone Cypionate	36	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	34	13
Fluoxetine Hcl	Fluoxetine Hcl	33	suppressed
Mirtazapine	Mirtazapine	33	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	32	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	32	16
Xarelto	Rivaroxaban	32	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	31	suppressed
Memantine Hcl	Memantine Hcl	31	suppressed
Valacyclovir	Valacyclovir Hcl	31	12
Chlorthalidone	Chlorthalidone	30	suppressed
Lidocaine	Lidocaine	30	suppressed
Fluticasone Propionate	Fluticasone Propionate	29	11
Ipratropium Bromide	Ipratropium Bromide	29	suppressed
Diclofenac Sodium	Diclofenac Sodium	28	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	28	suppressed
Naltrexone Hcl	Naltrexone Hcl	28	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	28	suppressed
Breo Ellipta	Fluticasone/Vilanterol	26	suppressed
Atenolol	Atenolol	25	suppressed
Donepezil Hcl	Donepezil Hcl	25	suppressed
Levetiracetam	Levetiracetam	25	suppressed
Zaleplon	Zaleplon	25	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	24	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	24	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	24	suppressed
Verapamil Sr	Verapamil Hcl	24	suppressed
Glipizide Er	Glipizide	23	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	23	suppressed
Valsartan	Valsartan	23	suppressed
Prednisone	Prednisone	22	17
Testosterone	Testosterone	22	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	20	18
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	20	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	20	suppressed
Ezetimibe	Ezetimibe	20	11
Methocarbamol	Methocarbamol	20	suppressed
Tresiba Flextouch U-100	Insulin Degludec	20	suppressed
Naproxen	Naproxen	19	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	19	13
Nystatin	Nystatin	19	suppressed
Stiolto Respimat	Tiotropium Br/Olodaterol Hcl	19	suppressed
Tresiba Flextouch U-200	Insulin Degludec	19	suppressed
Bumetanide	Bumetanide	18	suppressed
Ibuprofen	Ibuprofen	18	suppressed
Ketoconazole	Ketoconazole	18	12
Myrbetriq	Mirabegron	18	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	18	suppressed
Topiramate	Topiramate	18	suppressed
Ventolin Hfa	Albuterol Sulfate	18	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	17	suppressed
Azelastine Hcl	Azelastine Hcl	16	suppressed
Cephalexin	Cephalexin	16	14
Isosorbide Mononitrate Er	Isosorbide Mononitrate	16	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	16	suppressed
Amoxicillin	Amoxicillin	15	suppressed
Lamotrigine	Lamotrigine	15	suppressed
Loperamide	Loperamide Hcl	15	suppressed
Propranolol Hcl	Propranolol Hcl	15	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	15	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	14	suppressed
Benazepril-Hydrochlorothiazide	Benazepril/Hydrochlorothiazide	14	suppressed
Fenofibrate	Fenofibrate	14	suppressed
Fentanyl	Fentanyl	14	suppressed
Fluconazole	Fluconazole	14	suppressed
Irbesartan	Irbesartan	14	suppressed
Lansoprazole	Lansoprazole	14	suppressed
Methimazole	Methimazole	14	suppressed
Morphine Sulfate Er	Morphine Sulfate	14	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	14	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	14	14
Ropinirole Hcl	Ropinirole Hcl	14	suppressed
Baclofen	Baclofen	13	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	13	suppressed
Incruse Ellipta	Umeclidinium Bromide	13	suppressed
Linzess	Linaclotide	13	suppressed
Lovastatin	Lovastatin	13	suppressed
Medroxyprogesterone Acetate	Medroxyprogesterone Acetate	13	suppressed
Minocycline Hcl	Minocycline Hcl	13	suppressed
Propranolol Hcl Er	Propranolol Hcl	13	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	12	suppressed
Buspirone Hcl	Buspirone Hcl	12	suppressed
Diazepam	Diazepam	12	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	12	suppressed
Phenytoin	Phenytoin	12	suppressed
Spiriva Handihaler	Tiotropium Bromide	12	suppressed
Temazepam	Temazepam	12	suppressed
Trulicity	Dulaglutide	12	suppressed
Belsomra	Suvorexant	11	suppressed
Doxycycline Monohydrate	Doxycycline Monohydrate	11	suppressed
Farxiga	Dapagliflozin Propanediol	11	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	11	suppressed
Latanoprost	Latanoprost	11	suppressed
Nifedipine Er	Nifedipine	11	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	11	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	11	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	11	suppressed
Wegovy	Semaglutide	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