Healthcare provider profile · identity verified

Parag Sampat, MD

Internal Medicine · WATERLOO, IA · NPI 1508823998

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
Amlodipine Besylate	Amlodipine Besylate	810	211
Atorvastatin Calcium	Atorvastatin Calcium	761	209
Levothyroxine Sodium	Levothyroxine Sodium	654	156
Omeprazole	Omeprazole	586	154
Rosuvastatin Calcium	Rosuvastatin Calcium	545	152
Furosemide	Furosemide	455	119
Warfarin Sodium	Warfarin Sodium	450	61
Lisinopril	Lisinopril	410	112
Pantoprazole Sodium	Pantoprazole Sodium	407	107
Metoprolol Succinate	Metoprolol Succinate	375	96
Losartan Potassium	Losartan Potassium	368	99
Nifedipine Er	Nifedipine	361	84
Potassium Chloride	Potassium Chloride	314	71
Carvedilol	Carvedilol	309	74
Metoprolol Tartrate	Metoprolol Tartrate	304	82
Gabapentin	Gabapentin	282	74
Escitalopram Oxalate	Escitalopram Oxalate	253	69
Metformin Hcl	Metformin Hcl	251	65
Duloxetine Hcl	Duloxetine Hcl	237	65
Tamsulosin Hcl	Tamsulosin Hcl	237	63
Hydrochlorothiazide	Hydrochlorothiazide	229	54
Fluticasone Propionate	Fluticasone Propionate	227	76
Clopidogrel	Clopidogrel Bisulfate	225	53
Eliquis	Apixaban	217	39
Allopurinol	Allopurinol	215	48
Venlafaxine Hcl Er	Venlafaxine Hcl	212	64
Metformin Hcl Er	Metformin Hcl	158	40
Simvastatin	Simvastatin	157	54
Ezetimibe	Ezetimibe	151	41
Glipizide Er	Glipizide	150	37
Jardiance	Empagliflozin	142	36
Tramadol Hcl	Tramadol Hcl	136	37
Isosorbide Mononitrate Er	Isosorbide Mononitrate	122	24
Enalapril Maleate	Enalapril Maleate	116	24
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	116	30
Alendronate Sodium	Alendronate Sodium	113	29
Xarelto	Rivaroxaban	113	30
Hydralazine Hcl	Hydralazine Hcl	109	22
Ozempic	Semaglutide	105	18
Trazodone Hcl	Trazodone Hcl	105	28
Albuterol Sulfate Hfa	Albuterol Sulfate	103	39
Doxycycline Hyclate	Doxycycline Hyclate	99	71
Fenofibrate	Fenofibrate	98	24
Pravastatin Sodium	Pravastatin Sodium	98	26
Alprazolam	Alprazolam	96	22
Finasteride	Finasteride	96	28
Mirtazapine	Mirtazapine	95	28
Lorazepam	Lorazepam	86	14
Bumetanide	Bumetanide	85	29
Mounjaro	Tirzepatide	85	13
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	82	23
Spironolactone	Spironolactone	82	25
Buspirone Hcl	Buspirone Hcl	80	13
Sertraline Hcl	Sertraline Hcl	71	21
Famotidine	Famotidine	69	17
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	67	16
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	66	48
Atenolol	Atenolol	66	20
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	65	suppressed
Pregabalin	Pregabalin	64	12
Lovastatin	Lovastatin	63	17
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	61	27
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	59	15
Bupropion Xl	Bupropion Hcl	58	19
Meloxicam	Meloxicam	56	12
Montelukast Sodium	Montelukast Sodium	54	16
Oxybutynin Chloride Er	Oxybutynin Chloride	53	15
Azelastine Hcl	Azelastine Hcl	52	25
Prednisone	Prednisone	49	33
Tizanidine Hcl	Tizanidine Hcl	48	suppressed
Meclizine Hcl	Meclizine Hcl	47	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	47	35
Synthroid	Levothyroxine Sodium	45	11
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	45	13
Citalopram Hbr	Citalopram Hydrobromide	42	11
Gemfibrozil	Gemfibrozil	42	11
Ropinirole Hcl	Ropinirole Hcl	40	suppressed
Amoxicillin	Amoxicillin	39	17
Humalog Kwikpen U-100	Insulin Lispro	39	12
Midodrine Hcl	Midodrine Hcl	39	suppressed
Irbesartan	Irbesartan	38	11
Topiramate	Topiramate	37	11
Cephalexin	Cephalexin	36	15
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	36	13
Terazosin Hcl	Terazosin Hcl	36	12
Memantine Hcl	Memantine Hcl	35	suppressed
Jantoven	Warfarin Sodium	34	suppressed
Levetiracetam	Levetiracetam	34	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	32	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	32	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	32	suppressed
Ondansetron Odt	Ondansetron	31	suppressed
Minoxidil	Minoxidil	30	suppressed
Diclofenac Sodium	Diclofenac Sodium	29	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	29	suppressed
Amiodarone Hcl	Amiodarone Hcl	28	suppressed
Gemtesa	Vibegron	28	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	27	suppressed
Paroxetine Hcl	Paroxetine Hcl	27	suppressed
Celecoxib	Celecoxib	26	suppressed
Glipizide	Glipizide	25	suppressed
Januvia	Sitagliptin Phosphate	25	suppressed
Klor-Con M20	Potassium Chloride	25	suppressed
Ezetimibe-Simvastatin	Ezetimibe/Simvastatin	24	suppressed
Naproxen	Naproxen	24	17
Valsartan	Valsartan	24	suppressed
Fenofibrate	Fenofibrate,micronized	23	suppressed
Clonazepam	Clonazepam	22	suppressed
Eplerenone	Eplerenone	22	suppressed
Trulicity	Dulaglutide	22	suppressed
Benazepril Hcl	Benazepril Hcl	21	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	21	18
Fludrocortisone Acetate	Fludrocortisone Acetate	21	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	20	suppressed
Ibuprofen	Ibuprofen	20	suppressed
Primidone	Primidone	20	suppressed
Colesevelam Hcl	Colesevelam Hcl	19	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	19	suppressed
Nitroglycerin	Nitroglycerin	19	14
Triamcinolone Acetonide	Triamcinolone Acetonide	19	13
Carbidopa-Levodopa	Carbidopa/Levodopa	18	suppressed
Cholestyramine	Cholestyramine (With Sugar)	18	11
Dexlansoprazole Dr	Dexlansoprazole	18	suppressed
Humalog Kwikpen U-200	Insulin Lispro	18	suppressed
Ipratropium Bromide	Ipratropium Bromide	18	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	18	suppressed
Propranolol Hcl	Propranolol Hcl	18	suppressed
Testosterone Cypionate	Testosterone Cypionate	18	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	17	suppressed
Nystatin	Nystatin	17	11
Glimepiride	Glimepiride	16	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	16	suppressed
Valacyclovir	Valacyclovir Hcl	16	suppressed
Baclofen	Baclofen	15	suppressed
Enoxaparin Sodium	Enoxaparin Sodium	15	suppressed
Pradaxa	Dabigatran Etexilate Mesylate	15	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	15	suppressed
Victoza 3-Pak	Liraglutide	15	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	14	suppressed
Lidocaine	Lidocaine	14	suppressed
Pentips Pen Needle	Pen Needle, Diabetic	14	suppressed
Rybelsus	Semaglutide	14	suppressed
Torsemide	Torsemide	14	suppressed
Acyclovir	Acyclovir	13	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	13	suppressed
Donepezil Hcl	Donepezil Hcl	13	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	13	suppressed
Insulin Lispro	Insulin Lispro	13	suppressed
Klor-Con	Potassium Chloride	13	suppressed
Chlorthalidone	Chlorthalidone	12	suppressed
Clotrimazole	Clotrimazole	12	suppressed
Crestor	Rosuvastatin Calcium	12	suppressed
Imipramine Hcl	Imipramine Hcl	12	suppressed
Latanoprost	Latanoprost	12	suppressed
Methocarbamol	Methocarbamol	12	suppressed
Savella	Milnacipran Hcl	12	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	12	suppressed
Azithromycin	Azithromycin	11	suppressed
Cefdinir	Cefdinir	11	suppressed
Cilostazol	Cilostazol	11	suppressed
Creon	Lipase/Protease/Amylase	11	suppressed
Dilantin	Phenytoin Sodium Extended	11	suppressed
Hydrocortisone	Hydrocortisone	11	suppressed
Ketoconazole	Ketoconazole	11	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	11	suppressed
Mesalamine	Mesalamine	11	suppressed
Methotrexate	Methotrexate Sodium	11	suppressed
Nyamyc	Nystatin	11	suppressed
Oxycodone Hcl	Oxycodone Hcl	11	suppressed
Verapamil Er	Verapamil Hcl	11	suppressed
Xifaxan	Rifaximin	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