Healthcare provider profile · identity verified

Brian Thomas Trezak, MD

Internal Medicine · FLORENCE, SC · NPI 1003913526

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
Furosemide	Furosemide	245	56
Levothyroxine Sodium	Levothyroxine Sodium	238	50
Atorvastatin Calcium	Atorvastatin Calcium	234	63
Eliquis	Apixaban	189	43
Gabapentin	Gabapentin	188	45
Trazodone Hcl	Trazodone Hcl	166	33
Metoprolol Succinate	Metoprolol Succinate	162	41
Amlodipine Besylate	Amlodipine Besylate	157	42
Lisinopril	Lisinopril	154	35
Escitalopram Oxalate	Escitalopram Oxalate	134	27
Pantoprazole Sodium	Pantoprazole Sodium	133	44
Losartan Potassium	Losartan Potassium	92	23
Warfarin Sodium	Warfarin Sodium	92	12
Metoprolol Tartrate	Metoprolol Tartrate	88	25
Duloxetine Hcl	Duloxetine Hcl	78	26
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	78	12
Sertraline Hcl	Sertraline Hcl	76	27
Potassium Chloride	Potassium Chloride	70	27
Mirtazapine	Mirtazapine	61	20
Quetiapine Fumarate	Quetiapine Fumarate	59	18
Simvastatin	Simvastatin	58	17
Lorazepam	Lorazepam	57	33
Metformin Hcl	Metformin Hcl	55	15
Januvia	Sitagliptin Phosphate	53	suppressed
Spironolactone	Spironolactone	52	19
Carvedilol	Carvedilol	51	15
Clopidogrel	Clopidogrel Bisulfate	48	17
Omeprazole	Omeprazole	47	12
Hydralazine Hcl	Hydralazine Hcl	46	suppressed
Allopurinol	Allopurinol	45	11
Bumetanide	Bumetanide	40	suppressed
Memantine Hcl	Memantine Hcl	40	suppressed
Tramadol Hcl	Tramadol Hcl	39	18
Donepezil Hcl	Donepezil Hcl	32	12
Prednisone	Prednisone	32	14
Citalopram Hbr	Citalopram Hydrobromide	31	11
Levetiracetam	Levetiracetam	31	suppressed
Finasteride	Finasteride	30	suppressed
Montelukast Sodium	Montelukast Sodium	30	suppressed
Pravastatin Sodium	Pravastatin Sodium	30	suppressed
Torsemide	Torsemide	30	11
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	28	suppressed
Irbesartan	Irbesartan	28	suppressed
Methenamine Hippurate	Methenamine Hippurate	27	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	26	suppressed
Ondansetron Hcl	Ondansetron Hcl	26	22
Tamsulosin Hcl	Tamsulosin Hcl	26	14
Myrbetriq	Mirabegron	24	suppressed
Atenolol	Atenolol	23	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	23	suppressed
Oxycodone Hcl	Oxycodone Hcl	20	15
Amiodarone Hcl	Amiodarone Hcl	19	suppressed
Famotidine	Famotidine	19	11
Paroxetine Hcl	Paroxetine Hcl	19	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	19	suppressed
Buspirone Hcl	Buspirone Hcl	17	suppressed
Cefdinir	Cefdinir	17	15
Hydrochlorothiazide	Hydrochlorothiazide	17	suppressed
Latanoprost	Latanoprost	17	suppressed
Morphine Sulfate	Morphine Sulfate	17	13
Carbidopa-Levodopa	Carbidopa/Levodopa	16	suppressed
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	15	15
Baclofen	Baclofen	15	suppressed
Cephalexin	Cephalexin	15	11
Tresiba Flextouch U-100	Insulin Degludec	15	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	14	suppressed
Bupropion Xl	Bupropion Hcl	14	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	14	13
Ezetimibe	Ezetimibe	14	suppressed
Humalog Kwikpen U-100	Insulin Lispro	14	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	14	suppressed
Levofloxacin	Levofloxacin	14	12
Midodrine Hcl	Midodrine Hcl	14	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	14	13
Timolol Maleate	Timolol Maleate	14	suppressed
Azithromycin	Azithromycin	13	suppressed
Diltiazem Hcl	Diltiazem Hcl	13	suppressed
Fluticasone Propionate	Fluticasone Propionate	13	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	13	suppressed
Lamotrigine	Lamotrigine	13	suppressed
Nystatin	Nystatin	13	suppressed
Albuterol Sulfate	Albuterol Sulfate	12	suppressed
Arnuity Ellipta	Fluticasone Furoate	12	suppressed
Ropinirole Hcl	Ropinirole Hcl	12	suppressed
Xarelto	Rivaroxaban	12	suppressed
Atropine Sulfate	Atropine Sulfate	11	11
Clonazepam	Clonazepam	11	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	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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