Healthcare provider profile · identity verified

Roman Dreyer, MD

Internal Medicine · AURORA, IL · NPI 1376576793

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	493	129
Atorvastatin Calcium	Atorvastatin Calcium	456	120
Metformin Hcl	Metformin Hcl	412	101
Losartan Potassium	Losartan Potassium	343	91
Lisinopril	Lisinopril	304	83
Levothyroxine Sodium	Levothyroxine Sodium	267	63
Pravastatin Sodium	Pravastatin Sodium	257	69
Rosuvastatin Calcium	Rosuvastatin Calcium	218	56
Omeprazole	Omeprazole	216	61
Metoprolol Succinate	Metoprolol Succinate	191	51
Gabapentin	Gabapentin	170	45
Simvastatin	Simvastatin	159	36
Tamsulosin Hcl	Tamsulosin Hcl	151	40
Glimepiride	Glimepiride	148	35
Pantoprazole Sodium	Pantoprazole Sodium	140	41
Hydrochlorothiazide	Hydrochlorothiazide	126	35
Carvedilol	Carvedilol	116	23
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	111	18
Allopurinol	Allopurinol	101	30
Glipizide	Glipizide	99	20
Furosemide	Furosemide	91	22
Sertraline Hcl	Sertraline Hcl	91	22
Doxazosin Mesylate	Doxazosin Mesylate	90	14
Metoprolol Tartrate	Metoprolol Tartrate	76	20
Fluticasone Propionate	Fluticasone Propionate	74	25
Metformin Hcl Er	Metformin Hcl	72	17
Duloxetine Hcl	Duloxetine Hcl	71	20
Alprazolam	Alprazolam	64	13
Tramadol Hcl	Tramadol Hcl	64	22
Pioglitazone Hcl	Pioglitazone Hcl	60	16
Ezetimibe	Ezetimibe	58	17
Jardiance	Empagliflozin	50	14
Potassium Chloride	Potassium Chloride	49	16
Ozempic	Semaglutide	48	suppressed
Alendronate Sodium	Alendronate Sodium	47	14
Clopidogrel	Clopidogrel Bisulfate	46	12
Lovastatin	Lovastatin	46	13
Zolpidem Tartrate	Zolpidem Tartrate	46	suppressed
Celecoxib	Celecoxib	44	11
Albuterol Sulfate Hfa	Albuterol Sulfate	42	17
Trazodone Hcl	Trazodone Hcl	40	13
Enalapril Maleate	Enalapril Maleate	39	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	38	suppressed
Warfarin Sodium	Warfarin Sodium	38	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	37	14
Baclofen	Baclofen	35	15
Triamcinolone Acetonide	Triamcinolone Acetonide	35	16
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	34	12
Atenolol	Atenolol	33	11
Glipizide Er	Glipizide	33	suppressed
Hydralazine Hcl	Hydralazine Hcl	33	12
Prednisone	Prednisone	33	13
Eliquis	Apixaban	31	suppressed
Clobetasol Propionate	Clobetasol Propionate	30	suppressed
Finasteride	Finasteride	30	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	30	suppressed
Lorazepam	Lorazepam	30	suppressed
Trulicity	Dulaglutide	30	suppressed
Hydrocortisone	Hydrocortisone	28	13
Escitalopram Oxalate	Escitalopram Oxalate	26	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	26	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	26	suppressed
Ventolin Hfa	Albuterol Sulfate	26	suppressed
Nifedipine Er	Nifedipine	24	suppressed
Sildenafil Citrate	Sildenafil Citrate	24	suppressed
Spironolactone	Spironolactone	24	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	23	suppressed
Meloxicam	Meloxicam	22	11
Methimazole	Methimazole	22	suppressed
Gemfibrozil	Gemfibrozil	21	suppressed
Montelukast Sodium	Montelukast Sodium	21	suppressed
Tizanidine Hcl	Tizanidine Hcl	21	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	21	suppressed
Chlorthalidone	Chlorthalidone	20	suppressed
Bupropion Xl	Bupropion Hcl	19	suppressed
Famotidine	Famotidine	18	suppressed
Meclizine Hcl	Meclizine Hcl	18	suppressed
Methylprednisolone	Methylprednisolone	18	18
Nystatin	Nystatin	18	suppressed
Pregabalin	Pregabalin	18	suppressed
Propranolol Hcl Er	Propranolol Hcl	18	suppressed
Sucralfate	Sucralfate	18	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	17	suppressed
Clonidine Hcl	Clonidine Hcl	16	suppressed
Indapamide	Indapamide	16	suppressed
Mounjaro	Tirzepatide	16	suppressed
Synthroid	Levothyroxine Sodium	16	suppressed
Topiramate	Topiramate	16	suppressed
Benazepril Hcl	Benazepril Hcl	15	suppressed
Calcitonin-Salmon	Calcitonin,salmon,synthetic	15	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	15	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	15	suppressed
Colchicine	Colchicine	15	suppressed
Mirtazapine	Mirtazapine	15	suppressed
Primidone	Primidone	15	suppressed
Vitamin D2	Ergocalciferol (Vitamin D2)	15	suppressed
Azithromycin	Azithromycin	14	14
Calcitriol	Calcitriol	14	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	14	suppressed
Ketoconazole	Ketoconazole	14	suppressed
Memantine Hcl	Memantine Hcl	14	suppressed
Propranolol Hcl	Propranolol Hcl	14	suppressed
Citalopram Hbr	Citalopram Hydrobromide	13	suppressed
Clonazepam	Clonazepam	13	suppressed
Dilt-Xr	Diltiazem Hcl	13	suppressed
Hydromorphone Hcl	Hydromorphone Hcl	13	suppressed
Solifenacin Succinate	Solifenacin Succinate	13	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	12	suppressed
Donepezil Hcl	Donepezil Hcl	12	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	12	suppressed
Metronidazole	Metronidazole	12	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	12	11
Tramadol Hcl-Acetaminophen	Tramadol Hcl/Acetaminophen	12	suppressed
Valsartan	Valsartan	12	suppressed
Xarelto	Rivaroxaban	12	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	11	suppressed
Levetiracetam	Levetiracetam	11	suppressed
Morphine Sulfate Er	Morphine Sulfate	11	suppressed
Ropinirole Hcl	Ropinirole Hcl	11	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	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