Healthcare provider profile · identity verified

Charles J Willey, MD

Internal Medicine · SAINT LOUIS, MO · NPI 1811996028

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	449	136
Lisinopril	Lisinopril	309	91
Mirtazapine	Mirtazapine	299	111
Levothyroxine Sodium	Levothyroxine Sodium	249	72
Losartan Potassium	Losartan Potassium	244	70
Eliquis	Apixaban	211	45
Omeprazole	Omeprazole	203	64
Metformin Hcl	Metformin Hcl	201	73
Amlodipine Besylate	Amlodipine Besylate	194	54
Hydrochlorothiazide	Hydrochlorothiazide	187	59
Metoprolol Tartrate	Metoprolol Tartrate	186	64
Sertraline Hcl	Sertraline Hcl	179	49
Tramadol Hcl	Tramadol Hcl	158	61
Labetalol Hcl	Labetalol Hcl	156	47
Quetiapine Fumarate	Quetiapine Fumarate	153	21
Gabapentin	Gabapentin	141	49
Alprazolam	Alprazolam	138	43
Pantoprazole Sodium	Pantoprazole Sodium	130	47
Tamsulosin Hcl	Tamsulosin Hcl	122	39
Furosemide	Furosemide	115	48
Metoprolol Succinate	Metoprolol Succinate	115	41
Allopurinol	Allopurinol	107	30
Pravastatin Sodium	Pravastatin Sodium	107	27
Clopidogrel	Clopidogrel Bisulfate	106	27
Trazodone Hcl	Trazodone Hcl	103	35
Duloxetine Hcl	Duloxetine Hcl	100	30
Simvastatin	Simvastatin	100	32
Potassium Chloride	Potassium Chloride	96	37
Spironolactone	Spironolactone	76	25
Alendronate Sodium	Alendronate Sodium	74	22
Famotidine	Famotidine	71	18
Rosuvastatin Calcium	Rosuvastatin Calcium	70	22
Albuterol Sulfate Hfa	Albuterol Sulfate	66	25
Lorazepam	Lorazepam	64	17
Doxycycline Monohydrate	Doxycycline Monohydrate	57	43
Chlorthalidone	Chlorthalidone	53	18
Warfarin Sodium	Warfarin Sodium	53	14
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	50	15
Lovastatin	Lovastatin	49	17
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	47	42
Finasteride	Finasteride	46	16
Atenolol	Atenolol	45	14
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	43	18
Fluticasone Propionate	Fluticasone Propionate	42	20
Prednisone	Prednisone	42	31
Bupropion Hcl Sr	Bupropion Hcl	41	11
Carvedilol	Carvedilol	39	15
Doxycycline Hyclate	Doxycycline Hyclate	39	27
Citalopram Hbr	Citalopram Hydrobromide	38	12
Venlafaxine Hcl Er	Venlafaxine Hcl	35	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	32	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	32	suppressed
Methotrexate	Methotrexate Sodium	32	suppressed
Colchicine	Colchicine	31	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	31	suppressed
Amiodarone Hcl	Amiodarone Hcl	30	13
Doxazosin Mesylate	Doxazosin Mesylate	30	suppressed
Glimepiride	Glimepiride	29	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	29	26
Vitamin D2	Ergocalciferol (Vitamin D2)	29	15
Zolpidem Tartrate	Zolpidem Tartrate	29	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	28	suppressed
Enalapril Maleate	Enalapril Maleate	27	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	26	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	26	suppressed
Terazosin Hcl	Terazosin Hcl	26	suppressed
Primidone	Primidone	25	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	25	17
Dicyclomine Hcl	Dicyclomine Hcl	24	suppressed
Fluconazole	Fluconazole	24	16
Midodrine Hcl	Midodrine Hcl	24	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	22	suppressed
Memantine Hcl	Memantine Hcl	22	suppressed
Semglee (Yfgn) Pen	Insulin Glargine-Yfgn	22	suppressed
Ezetimibe	Ezetimibe	21	suppressed
Latanoprost	Latanoprost	21	suppressed
Ropinirole Hcl	Ropinirole Hcl	21	suppressed
Donepezil Hcl	Donepezil Hcl	20	suppressed
Levetiracetam	Levetiracetam	20	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	20	suppressed
Xarelto	Rivaroxaban	20	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	19	suppressed
Clonazepam	Clonazepam	19	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	19	suppressed
Temazepam	Temazepam	19	suppressed
Bupropion Xl	Bupropion Hcl	18	suppressed
Diazepam	Diazepam	18	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	18	suppressed
Montelukast Sodium	Montelukast Sodium	18	suppressed
Topiramate	Topiramate	18	suppressed
Torsemide	Torsemide	18	suppressed
Acyclovir	Acyclovir	17	suppressed
Azithromycin	Azithromycin	17	15
Ciprofloxacin Hcl	Ciprofloxacin Hcl	17	13
Digoxin	Digoxin	17	suppressed
Folic Acid	Folic Acid	17	suppressed
Ibuprofen	Ibuprofen	17	suppressed
Propranolol Hcl	Propranolol Hcl	17	suppressed
Ramipril	Ramipril	17	suppressed
Testosterone Cypionate	Testosterone Cypionate	17	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	16	suppressed
Celecoxib	Celecoxib	16	suppressed
Klor-Con M20	Potassium Chloride	16	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	16	13
Oxybutynin Chloride	Oxybutynin Chloride	16	suppressed
Tiadylt Er	Diltiazem Hcl	16	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	16	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	15	suppressed
Paroxetine Hcl	Paroxetine Hcl	15	suppressed
Tolterodine Tartrate	Tolterodine Tartrate	15	suppressed
Amoxicillin	Amoxicillin	14	suppressed
Glipizide	Glipizide	14	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	14	suppressed
Pregabalin	Pregabalin	14	suppressed
Raloxifene Hcl	Raloxifene Hcl	14	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	13	suppressed
Methimazole	Methimazole	13	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	13	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	13	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	12	12
Diltiazem 12hr Er	Diltiazem Hcl	12	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	12	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	12	suppressed
Mounjaro	Tirzepatide	12	suppressed
Valsartan	Valsartan	12	suppressed
Glipizide Er	Glipizide	11	suppressed
Insulin Aspart Flexpen	Insulin Aspart	11	suppressed
Metolazone	Metolazone	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