Healthcare provider profile · identity verified

Allen D Williams, MD

Internal Medicine · ROCKFORD, IL · NPI 1073601324

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	1093	290
Amlodipine Besylate	Amlodipine Besylate	640	164
Levothyroxine Sodium	Levothyroxine Sodium	594	145
Losartan Potassium	Losartan Potassium	398	108
Lisinopril	Lisinopril	354	100
Metformin Hcl	Metformin Hcl	344	95
Tamsulosin Hcl	Tamsulosin Hcl	305	85
Omeprazole	Omeprazole	301	88
Gabapentin	Gabapentin	251	67
Metoprolol Succinate	Metoprolol Succinate	224	66
Jardiance	Empagliflozin	219	55
Rosuvastatin Calcium	Rosuvastatin Calcium	214	66
Terazosin Hcl	Terazosin Hcl	213	55
Pantoprazole Sodium	Pantoprazole Sodium	202	55
Metoprolol Tartrate	Metoprolol Tartrate	196	52
Hydrochlorothiazide	Hydrochlorothiazide	194	58
Pravastatin Sodium	Pravastatin Sodium	186	48
Potassium Chloride	Potassium Chloride	182	47
Sertraline Hcl	Sertraline Hcl	179	47
Simvastatin	Simvastatin	179	46
Ozempic	Semaglutide	169	21
Furosemide	Furosemide	165	48
Glipizide	Glipizide	160	43
Ezetimibe	Ezetimibe	157	46
Alendronate Sodium	Alendronate Sodium	139	41
Duloxetine Hcl	Duloxetine Hcl	134	35
Eliquis	Apixaban	134	29
Clopidogrel	Clopidogrel Bisulfate	127	37
Spironolactone	Spironolactone	112	32
Allopurinol	Allopurinol	109	30
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	107	28
Atenolol	Atenolol	104	27
Mounjaro	Tirzepatide	103	13
Hydralazine Hcl	Hydralazine Hcl	101	24
Carvedilol	Carvedilol	98	33
Trazodone Hcl	Trazodone Hcl	97	25
Donepezil Hcl	Donepezil Hcl	93	28
Albuterol Sulfate Hfa	Albuterol Sulfate	91	45
Tramadol Hcl	Tramadol Hcl	89	32
Finasteride	Finasteride	84	25
Irbesartan	Irbesartan	82	22
Methylprednisolone	Methylprednisolone	78	63
Fluticasone Propionate	Fluticasone Propionate	76	31
Meloxicam	Meloxicam	76	21
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	75	26
Montelukast Sodium	Montelukast Sodium	72	21
Venlafaxine Hcl Er	Venlafaxine Hcl	70	17
Lovastatin	Lovastatin	69	18
Ropinirole Hcl	Ropinirole Hcl	69	19
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	67	18
Glipizide Er	Glipizide	65	18
Escitalopram Oxalate	Escitalopram Oxalate	63	15
Klor-Con M20	Potassium Chloride	60	24
Pioglitazone Hcl	Pioglitazone Hcl	58	17
Isosorbide Mononitrate Er	Isosorbide Mononitrate	57	17
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	56	18
Metformin Hcl Er	Metformin Hcl	55	18
Trulicity	Dulaglutide	55	suppressed
Warfarin Sodium	Warfarin Sodium	55	15
Enalapril Maleate	Enalapril Maleate	53	12
Farxiga	Dapagliflozin Propanediol	52	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	51	14
Fenofibrate	Fenofibrate	50	15
Zolpidem Tartrate	Zolpidem Tartrate	48	suppressed
Clonidine Hcl	Clonidine Hcl	47	suppressed
Tizanidine Hcl	Tizanidine Hcl	47	17
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	45	12
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	44	13
Amitriptyline Hcl	Amitriptyline Hcl	43	14
Clonazepam	Clonazepam	42	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	42	16
Pregabalin	Pregabalin	42	suppressed
Valsartan	Valsartan	42	11
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	40	14
Topiramate	Topiramate	40	suppressed
Doxepin Hcl	Doxepin Hcl	38	suppressed
Dutasteride	Dutasteride	38	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	37	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	37	37
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	37	35
Famotidine	Famotidine	36	suppressed
Novolog Mix 70-30 Flexpen	Insulin Aspart Prot/Insuln Asp	36	suppressed
Nifedipine Er	Nifedipine	35	suppressed
Naproxen	Naproxen	34	11
Esomeprazole Magnesium	Esomeprazole Magnesium	33	11
Fluoxetine Hcl	Fluoxetine Hcl	32	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	32	11
Valacyclovir	Valacyclovir Hcl	31	14
Verapamil Er	Verapamil Hcl	31	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	30	26
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	30	13
Dicyclomine Hcl	Dicyclomine Hcl	29	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	29	suppressed
Primidone	Primidone	29	suppressed
Incruse Ellipta	Umeclidinium Bromide	28	suppressed
Lorazepam	Lorazepam	28	12
Alprazolam	Alprazolam	27	18
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	27	23
Chlorthalidone	Chlorthalidone	27	suppressed
Levofloxacin	Levofloxacin	27	25
Bupropion Hcl Sr	Bupropion Hcl	26	suppressed
Memantine Hcl	Memantine Hcl	25	suppressed
Propranolol Hcl Er	Propranolol Hcl	25	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	25	suppressed
Benazepril Hcl	Benazepril Hcl	24	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	24	suppressed
Xarelto	Rivaroxaban	24	suppressed
Citalopram Hbr	Citalopram Hydrobromide	23	suppressed
Estradiol	Estradiol	23	suppressed
Fluconazole	Fluconazole	23	16
Levetiracetam	Levetiracetam	23	suppressed
Acyclovir	Acyclovir	22	suppressed
Advair Diskus	Fluticasone Propion/Salmeterol	22	suppressed
Breo Ellipta	Fluticasone/Vilanterol	22	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	22	suppressed
Midodrine Hcl	Midodrine Hcl	22	suppressed
Temazepam	Temazepam	22	suppressed
Buspirone Hcl	Buspirone Hcl	21	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	21	suppressed
Azithromycin	Azithromycin	20	20
Hydroxyzine Hcl	Hydroxyzine Hcl	20	11
Ibuprofen	Ibuprofen	20	suppressed
Vitamin D2	Ergocalciferol (Vitamin D2)	20	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	18	suppressed
Meclizine Hcl	Meclizine Hcl	18	12
Myrbetriq	Mirabegron	18	suppressed
Propranolol Hcl	Propranolol Hcl	18	suppressed
Synthroid	Levothyroxine Sodium	18	suppressed
Atenolol-Chlorthalidone	Atenolol/Chlorthalidone	17	suppressed
Azelastine Hcl	Azelastine Hcl	17	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	17	15
Novolog Flexpen	Insulin Aspart	17	suppressed
Prednisone	Prednisone	17	suppressed
Ventolin Hfa	Albuterol Sulfate	17	suppressed
Bupropion Xl	Bupropion Hcl	16	suppressed
Cephalexin	Cephalexin	16	16
Gemfibrozil	Gemfibrozil	16	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	15	suppressed
Baclofen	Baclofen	15	suppressed
Bumetanide	Bumetanide	15	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	14	suppressed
Bethanechol Chloride	Bethanechol Chloride	14	suppressed
Diclofenac Sodium	Diclofenac Sodium	14	suppressed
Ketoconazole	Ketoconazole	14	suppressed
Labetalol Hcl	Labetalol Hcl	14	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	14	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	14	suppressed
Celecoxib	Celecoxib	13	suppressed
Diazepam	Diazepam	13	suppressed
Risperidone	Risperidone	13	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	13	suppressed
Aripiprazole	Aripiprazole	12	suppressed
Mirtazapine	Mirtazapine	12	suppressed
Oxcarbazepine	Oxcarbazepine	12	suppressed
Raloxifene Hcl	Raloxifene Hcl	12	suppressed
Ramipril	Ramipril	12	suppressed
Scopolamine	Scopolamine	12	suppressed
Sildenafil Citrate	Sildenafil Citrate	12	suppressed
Isosorbide Mononitrate	Isosorbide Mononitrate	11	suppressed
Metolazone	Metolazone	11	suppressed
Nabumetone	Nabumetone	11	suppressed
Tramadol Hcl-Acetaminophen	Tramadol Hcl/Acetaminophen	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