Healthcare provider profile · identity verified

Frederick Harold Kozlowski, MD

Internal Medicine · WINCHESTER, VA · NPI 1508829995

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	127
Atorvastatin Calcium	Atorvastatin Calcium	432	111
Lisinopril	Lisinopril	367	93
Levothyroxine Sodium	Levothyroxine Sodium	308	70
Pravastatin Sodium	Pravastatin Sodium	266	65
Rosuvastatin Calcium	Rosuvastatin Calcium	242	59
Simvastatin	Simvastatin	211	55
Metformin Hcl	Metformin Hcl	202	51
Pantoprazole Sodium	Pantoprazole Sodium	189	58
Tamsulosin Hcl	Tamsulosin Hcl	188	44
Metoprolol Succinate	Metoprolol Succinate	171	49
Bisoprolol Fumarate	Bisoprolol Fumarate	162	33
Glimepiride	Glimepiride	155	39
Losartan Potassium	Losartan Potassium	155	41
Gabapentin	Gabapentin	151	37
Hydrochlorothiazide	Hydrochlorothiazide	149	39
Furosemide	Furosemide	147	44
Meloxicam	Meloxicam	143	34
Omeprazole	Omeprazole	127	31
Lorazepam	Lorazepam	119	23
Sertraline Hcl	Sertraline Hcl	117	25
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	114	31
Donepezil Hcl	Donepezil Hcl	109	26
Prednisone	Prednisone	109	70
Spironolactone	Spironolactone	108	30
Escitalopram Oxalate	Escitalopram Oxalate	104	24
Trazodone Hcl	Trazodone Hcl	104	28
Potassium Chloride	Potassium Chloride	103	26
Atenolol	Atenolol	98	25
Finasteride	Finasteride	97	21
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	95	19
Venlafaxine Hcl Er	Venlafaxine Hcl	92	23
Alendronate Sodium	Alendronate Sodium	91	22
Doxazosin Mesylate	Doxazosin Mesylate	91	22
Allopurinol	Allopurinol	89	22
Metoprolol Tartrate	Metoprolol Tartrate	89	25
Clopidogrel	Clopidogrel Bisulfate	87	23
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	87	19
Duloxetine Hcl	Duloxetine Hcl	86	20
Carvedilol	Carvedilol	80	21
Irbesartan	Irbesartan	80	17
Valsartan	Valsartan	80	16
Citalopram Hbr	Citalopram Hydrobromide	79	17
Eliquis	Apixaban	78	22
Pioglitazone Hcl	Pioglitazone Hcl	78	19
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	74	17
Carbidopa-Levodopa	Carbidopa/Levodopa	69	18
Tramadol Hcl	Tramadol Hcl	69	26
Paroxetine Hcl	Paroxetine Hcl	66	13
Synthroid	Levothyroxine Sodium	66	18
Diclofenac Sodium	Diclofenac Sodium	65	16
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	65	20
Torsemide	Torsemide	65	16
Zolpidem Tartrate	Zolpidem Tartrate	65	22
Mirtazapine	Mirtazapine	64	14
Fluoxetine Hcl	Fluoxetine Hcl	60	17
Alprazolam	Alprazolam	57	13
Hydralazine Hcl	Hydralazine Hcl	54	15
Memantine Hcl	Memantine Hcl	54	17
Cephalexin	Cephalexin	52	44
Ezetimibe	Ezetimibe	52	12
Olanzapine	Olanzapine	51	11
Jardiance	Empagliflozin	50	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	50	suppressed
Albuterol Sulfate Hfa	Albuterol Sulfate	49	19
Chlorthalidone	Chlorthalidone	47	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	47	suppressed
Warfarin Sodium	Warfarin Sodium	46	12
Montelukast Sodium	Montelukast Sodium	44	13
Ropinirole Hcl	Ropinirole Hcl	44	suppressed
Amoxicillin	Amoxicillin	43	37
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	43	suppressed
Ozempic	Semaglutide	43	suppressed
Pregabalin	Pregabalin	43	suppressed
Temazepam	Temazepam	43	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	41	11
Propranolol Hcl	Propranolol Hcl	41	suppressed
Xarelto	Rivaroxaban	41	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	40	27
Fluticasone Propionate	Fluticasone Propionate	39	18
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	37	suppressed
Famotidine	Famotidine	37	11
Tizanidine Hcl	Tizanidine Hcl	37	17
Olmesartan Medoxomil	Olmesartan Medoxomil	36	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	34	suppressed
Clonazepam	Clonazepam	33	suppressed
Clonidine Hcl	Clonidine Hcl	33	suppressed
Cefuroxime	Cefuroxime Axetil	32	25
Ciprofloxacin Hcl	Ciprofloxacin Hcl	32	26
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	32	suppressed
Bupropion Xl	Bupropion Hcl	31	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	31	11
Amiodarone Hcl	Amiodarone Hcl	30	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	30	25
Benazepril Hcl	Benazepril Hcl	30	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	30	suppressed
Metformin Hcl Er	Metformin Hcl	29	suppressed
Methylprednisolone	Methylprednisolone	29	24
Shingrix	Varicella-Zoster Ge/As01b/Pf	28	21
Buspirone Hcl	Buspirone Hcl	27	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	27	suppressed
Azithromycin	Azithromycin	26	24
Tramadol Hcl-Acetaminophen	Tramadol Hcl/Acetaminophen	26	suppressed
Bupropion Hcl Sr	Bupropion Hcl	24	suppressed
Ramipril	Ramipril	24	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	23	suppressed
Januvia	Sitagliptin Phosphate	23	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	23	suppressed
Ibuprofen	Ibuprofen	22	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	22	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	22	suppressed
Primidone	Primidone	22	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	21	13
Nebivolol Hcl	Nebivolol Hcl	20	suppressed
Verapamil Er	Verapamil Hcl	20	suppressed
Estradiol	Estradiol	19	suppressed
Fluconazole	Fluconazole	19	11
Glipizide	Glipizide	19	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	19	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	18	suppressed
Azelastine Hcl	Azelastine Hcl	18	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	18	11
Klor-Con M20	Potassium Chloride	18	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	17	suppressed
Atenolol-Chlorthalidone	Atenolol/Chlorthalidone	17	suppressed
Benazepril-Hydrochlorothiazide	Benazepril/Hydrochlorothiazide	17	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	17	suppressed
Lovastatin	Lovastatin	17	suppressed
Naproxen	Naproxen	17	suppressed
Valacyclovir	Valacyclovir Hcl	17	suppressed
Boostrix Tdap	Diphth,pertuss(Acell),tet Vac	16	16
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	16	14
Nitroglycerin	Nitroglycerin	16	13
Paxlovid	Nirmatrelvir/Ritonavir	16	16
Raloxifene Hcl	Raloxifene Hcl	16	suppressed
Dextroamphetamine-Amphetamine	Dextroamphetamine/Amphetamine	15	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	15	suppressed
Fludrocortisone Acetate	Fludrocortisone Acetate	15	suppressed
Ipratropium Bromide	Ipratropium Bromide	15	suppressed
Propranolol Hcl Er	Propranolol Hcl	15	suppressed
Solifenacin Succinate	Solifenacin Succinate	15	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	15	suppressed
Quetiapine Fumarate Er	Quetiapine Fumarate	14	suppressed
Tolterodine Tartrate	Tolterodine Tartrate	14	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	14	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	14	suppressed
Novolog Flexpen	Insulin Aspart	13	suppressed
Ondansetron Hcl	Ondansetron Hcl	13	12
Tresiba Flextouch U-100	Insulin Degludec	13	suppressed
Celecoxib	Celecoxib	12	suppressed
Colchicine	Colchicine	12	suppressed
Diclofenac Sodium Er	Diclofenac Sodium	12	suppressed
Entresto	Sacubitril/Valsartan	12	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	12	suppressed
Humalog Kwikpen U-100	Insulin Lispro	12	suppressed
Irbesartan-Hydrochlorothiazide	Irbesartan/Hydrochlorothiazide	12	suppressed
Meclizine Hcl	Meclizine Hcl	12	suppressed
Minocycline Hcl	Minocycline Hcl	12	suppressed
Breo Ellipta	Fluticasone/Vilanterol	11	suppressed
Bupropion Hcl	Bupropion Hcl	11	suppressed
Clindamycin Hcl	Clindamycin Hcl	11	suppressed
Diltiazem 24hr Er (La)	Diltiazem Hcl	11	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	11	suppressed
Nystatin	Nystatin	11	suppressed
Terazosin Hcl	Terazosin Hcl	11	suppressed
Testosterone	Testosterone	11	suppressed
Topiramate	Topiramate	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