Healthcare provider profile · identity verified

Daniel Stephen Lau, M.D.

Family Practice · NORMAL, IL · NPI 1720398480

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	1139	143
Eliquis	Apixaban	907	86
Amlodipine Besylate	Amlodipine Besylate	744	93
Furosemide	Furosemide	662	101
Levothyroxine Sodium	Levothyroxine Sodium	628	89
Potassium Chloride	Potassium Chloride	576	84
Gabapentin	Gabapentin	547	76
Lisinopril	Lisinopril	499	75
Metoprolol Succinate	Metoprolol Succinate	462	77
Donepezil Hcl	Donepezil Hcl	445	58
Pantoprazole Sodium	Pantoprazole Sodium	409	64
Tamsulosin Hcl	Tamsulosin Hcl	387	60
Sertraline Hcl	Sertraline Hcl	379	63
Losartan Potassium	Losartan Potassium	311	44
Quetiapine Fumarate	Quetiapine Fumarate	290	55
Memantine Hcl	Memantine Hcl	285	41
Omeprazole	Omeprazole	284	51
Metformin Hcl	Metformin Hcl	248	33
Metoprolol Tartrate	Metoprolol Tartrate	235	36
Mirtazapine	Mirtazapine	234	37
Carbidopa-Levodopa	Carbidopa/Levodopa	229	26
Buspirone Hcl	Buspirone Hcl	225	33
Warfarin Sodium	Warfarin Sodium	225	11
Clopidogrel	Clopidogrel Bisulfate	200	32
Trazodone Hcl	Trazodone Hcl	196	31
Escitalopram Oxalate	Escitalopram Oxalate	193	31
Carvedilol	Carvedilol	192	33
Levetiracetam	Levetiracetam	192	14
Alendronate Sodium	Alendronate Sodium	165	24
Spironolactone	Spironolactone	156	31
Lamotrigine	Lamotrigine	137	13
Famotidine	Famotidine	132	17
Montelukast Sodium	Montelukast Sodium	126	15
Rosuvastatin Calcium	Rosuvastatin Calcium	120	18
Duloxetine Hcl	Duloxetine Hcl	115	18
Allopurinol	Allopurinol	114	12
Torsemide	Torsemide	111	17
Oxybutynin Chloride Er	Oxybutynin Chloride	110	17
Shingrix	Varicella-Zoster Ge/As01b/Pf	109	86
Simvastatin	Simvastatin	108	18
Fluticasone Propionate	Fluticasone Propionate	104	47
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	103	41
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	99	suppressed
Alprazolam	Alprazolam	96	21
Cephalexin	Cephalexin	96	38
Myrbetriq	Mirabegron	95	suppressed
Propranolol Hcl	Propranolol Hcl	94	suppressed
Ropinirole Hcl	Ropinirole Hcl	94	suppressed
Pravastatin Sodium	Pravastatin Sodium	91	17
Atenolol	Atenolol	89	suppressed
Hydralazine Hcl	Hydralazine Hcl	88	14
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	88	suppressed
Citalopram Hbr	Citalopram Hydrobromide	87	20
Tramadol Hcl	Tramadol Hcl	85	32
Jardiance	Empagliflozin	84	suppressed
Finasteride	Finasteride	83	12
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	83	27
Xarelto	Rivaroxaban	83	suppressed
Enulose	Lactulose	82	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	82	12
Prednisone	Prednisone	80	26
Fluoxetine Hcl	Fluoxetine Hcl	79	12
Tradjenta	Linagliptin	76	suppressed
Latanoprost	Latanoprost	69	14
Hydrochlorothiazide	Hydrochlorothiazide	67	suppressed
Triamcinolone Acetonide	Triamcinolone Acetonide	65	29
Amiodarone Hcl	Amiodarone Hcl	64	11
Namzaric	Memantine Hcl/Donepezil Hcl	64	suppressed
Chlorthalidone	Chlorthalidone	62	suppressed
Bupropion Xl	Bupropion Hcl	59	12
Clonazepam	Clonazepam	59	12
Ezetimibe	Ezetimibe	58	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	58	43
Olanzapine	Olanzapine	58	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	56	11
Ondansetron Hcl	Ondansetron Hcl	56	41
Divalproex Sodium	Divalproex Sodium	55	suppressed
Tizanidine Hcl	Tizanidine Hcl	55	13
Lorazepam	Lorazepam	54	17
Meloxicam	Meloxicam	54	11
Digoxin	Digoxin	52	suppressed
Januvia	Sitagliptin Phosphate	51	suppressed
Pregabalin	Pregabalin	49	13
Albuterol Sulfate Hfa	Albuterol Sulfate	47	27
Nifedipine Er	Nifedipine	47	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	46	suppressed
Metformin Hcl Er	Metformin Hcl	46	suppressed
Nystatin	Nystatin	44	34
Lansoprazole	Lansoprazole	42	suppressed
Bupropion Hcl	Bupropion Hcl	41	suppressed
Primidone	Primidone	41	suppressed
Glipizide	Glipizide	40	11
Venlafaxine Hcl	Venlafaxine Hcl	40	suppressed
Colestipol Hcl	Colestipol Hcl	38	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	38	suppressed
Amantadine	Amantadine Hcl	37	suppressed
Glimepiride	Glimepiride	37	suppressed
Celecoxib	Celecoxib	36	suppressed
Risperidone	Risperidone	35	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	34	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	34	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	34	suppressed
Amoxicillin	Amoxicillin	33	16
Breo Ellipta	Fluticasone/Vilanterol	33	suppressed
Memantine Hcl Er	Memantine Hcl	33	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	32	suppressed
Gemtesa	Vibegron	32	suppressed
Oxybutynin Chloride	Oxybutynin Chloride	32	suppressed
Paroxetine Hcl	Paroxetine Hcl	32	suppressed
Diltiazem 24hr Er	Diltiazem Hcl	31	suppressed
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	31	11
Rivastigmine	Rivastigmine	31	suppressed
Estradiol	Estradiol	30	suppressed
Ondansetron Odt	Ondansetron	30	21
Albuterol Sulfate	Albuterol Sulfate	29	22
Anoro Ellipta	Umeclidinium Brm/Vilanterol Tr	29	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	29	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	29	19
Lantus	Insulin Glargine,hum.Rec.Anlog	29	suppressed
Spiriva Handihaler	Tiotropium Bromide	29	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	28	suppressed
Diclofenac Sodium	Diclofenac Sodium	27	14
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	27	18
Midodrine Hcl	Midodrine Hcl	27	suppressed
Rivastigmine	Rivastigmine Tartrate	27	suppressed
Admelog Solostar	Insulin Lispro	26	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	26	18
Doxepin Hcl	Doxepin Hcl	26	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	26	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	25	suppressed
Creon	Lipase/Protease/Amylase	25	suppressed
Humalog Kwikpen U-100	Insulin Lispro	25	suppressed
Incruse Ellipta	Umeclidinium Bromide	25	suppressed
Methenamine Hippurate	Methenamine Hippurate	25	suppressed
Verapamil Sr	Verapamil Hcl	25	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	24	20
Diltiazem 24hr Er (La)	Diltiazem Hcl	24	suppressed
Sucralfate	Sucralfate	24	suppressed
Carbidopa-Levodopa Er	Carbidopa/Levodopa	23	suppressed
Ceftriaxone	Ceftriaxone Sodium	23	13
Methimazole	Methimazole	23	suppressed
Diltiazem Hcl	Diltiazem Hcl	22	suppressed
Erythromycin	Erythromycin Base	22	suppressed
Fiasp Flextouch	Insulin Aspart (Niacinamide)	22	suppressed
Folic Acid	Folic Acid	22	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	22	suppressed
Aripiprazole	Aripiprazole	21	suppressed
Brilinta	Ticagrelor	21	suppressed
Farxiga	Dapagliflozin Propanediol	21	suppressed
Nyamyc	Nystatin	21	14
Terazosin Hcl	Terazosin Hcl	21	suppressed
Trulicity	Dulaglutide	21	suppressed
Atropine Sulfate	Atropine Sulfate	20	17
Budesonide	Budesonide	20	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	20	suppressed
Linzess	Linaclotide	20	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	20	suppressed
Sodium Chloride	0.9 % Sodium Chloride	20	11
Baclofen	Baclofen	19	suppressed
Divalproex Sodium Er	Divalproex Sodium	19	suppressed
Kapspargo Sprinkle	Metoprolol Succinate	19	suppressed
Nuplazid	Pimavanserin Tartrate	19	suppressed
Tiotropium Bromide	Tiotropium Bromide	19	suppressed
Glipizide Er	Glipizide	18	suppressed
Haloperidol	Haloperidol	18	suppressed
Ibuprofen	Ibuprofen	18	suppressed
Isosorbide Dinitrate	Isosorbide Dinitrate	18	suppressed
Vascepa	Icosapent Ethyl	18	suppressed
Entresto	Sacubitril/Valsartan	17	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	16	suppressed
Entacapone	Entacapone	15	suppressed
Novolog Mix 70-30 Flexpen	Insulin Aspart Prot/Insuln Asp	15	suppressed
Ranolazine Er	Ranolazine	15	suppressed
Vitamin D2	Ergocalciferol (Vitamin D2)	15	suppressed
Benztropine Mesylate	Benztropine Mesylate	14	suppressed
Carbidopa-Levodopa-Entacapone	Carbidopa/Levodopa/Entacapone	14	suppressed
Cilostazol	Cilostazol	14	suppressed
Diazepam	Diazepam	14	suppressed
Dilt-Xr	Diltiazem Hcl	14	suppressed
Fluconazole	Fluconazole	14	suppressed
Ketoconazole	Ketoconazole	14	suppressed
Loperamide	Loperamide Hcl	14	13
Nystop	Nystatin	14	suppressed
Prazosin Hcl	Prazosin Hcl	14	suppressed
Scopolamine	Scopolamine	14	suppressed
Topiramate	Topiramate	14	suppressed
Valsartan	Valsartan	14	suppressed
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	13	13
Acetaminophen-Codeine	Acetaminophen With Codeine	13	suppressed
Candesartan Cilexetil	Candesartan Cilexetil	13	suppressed
Clobetasol Propionate	Clobetasol Propionate	13	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	13	suppressed
Lubiprostone	Lubiprostone	13	suppressed
Ozempic	Semaglutide	13	suppressed
Trihexyphenidyl Hcl	Trihexyphenidyl Hcl	13	suppressed
Zenpep	Lipase/Protease/Amylase	13	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	12	suppressed
Carbamazepine Er	Carbamazepine	12	suppressed
Dabigatran Etexilate	Dabigatran Etexilate Mesylate	12	suppressed
Dorzolamide-Timolol	Dorzolamide Hcl/Timolol Maleat	12	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	12	suppressed
Gentamicin Sulfate	Gentamicin Sulfate	12	suppressed
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	12	suppressed
Methotrexate	Methotrexate Sodium	12	suppressed
Rocklatan	Netarsudil Mesylat/Latanoprost	12	suppressed
Silodosin	Silodosin	12	suppressed
Sotalol	Sotalol Hcl	12	suppressed
Tolterodine Tartrate Er	Tolterodine Tartrate	12	suppressed
Cefadroxil	Cefadroxil	11	suppressed
Hydrocortisone	Hydrocortisone	11	suppressed
Lidocaine Hcl	Lidocaine Hcl/Pf	11	suppressed
Polymyxin B Sul-Trimethoprim	Polymyxin B Sulf/Trimethoprim	11	suppressed
Propafenone Hcl	Propafenone Hcl	11	suppressed
Tresiba Flextouch U-100	Insulin Degludec	11	suppressed
Trintellix	Vortioxetine Hydrobromide	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