Healthcare provider profile · identity verified

Allen Y Tsui, MD

Family Practice · TAPPAHANNOCK, VA · NPI 1194703355

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	543	167
Amlodipine Besylate	Amlodipine Besylate	471	138
Metoprolol Succinate	Metoprolol Succinate	289	75
Gabapentin	Gabapentin	274	52
Lisinopril	Lisinopril	268	82
Losartan Potassium	Losartan Potassium	260	80
Metformin Hcl	Metformin Hcl	259	80
Hydrochlorothiazide	Hydrochlorothiazide	233	66
Omeprazole	Omeprazole	217	65
Albuterol Sulfate Hfa	Albuterol Sulfate	202	74
Levothyroxine Sodium	Levothyroxine Sodium	194	54
Montelukast Sodium	Montelukast Sodium	174	50
Furosemide	Furosemide	162	51
Rosuvastatin Calcium	Rosuvastatin Calcium	149	48
Allopurinol	Allopurinol	146	41
Metoprolol Tartrate	Metoprolol Tartrate	145	47
Pantoprazole Sodium	Pantoprazole Sodium	145	41
Famotidine	Famotidine	143	48
Fluticasone Propionate	Fluticasone Propionate	143	56
Potassium Chloride	Potassium Chloride	142	44
Tamsulosin Hcl	Tamsulosin Hcl	140	36
Citalopram Hbr	Citalopram Hydrobromide	130	37
Diclofenac Sodium	Diclofenac Sodium	128	47
Eliquis	Apixaban	109	29
Jardiance	Empagliflozin	105	27
Clopidogrel	Clopidogrel Bisulfate	104	32
Simvastatin	Simvastatin	102	31
Prednisone	Prednisone	101	45
Triamcinolone Acetonide	Triamcinolone Acetonide	95	34
Carvedilol	Carvedilol	94	31
Pravastatin Sodium	Pravastatin Sodium	91	30
Hydralazine Hcl	Hydralazine Hcl	78	21
Duloxetine Hcl	Duloxetine Hcl	77	21
Azithromycin	Azithromycin	76	61
Sertraline Hcl	Sertraline Hcl	76	25
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	74	23
Pregabalin	Pregabalin	74	14
Fluoxetine Hcl	Fluoxetine Hcl	73	17
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	72	20
Trazodone Hcl	Trazodone Hcl	72	23
Spironolactone	Spironolactone	71	20
Mounjaro	Tirzepatide	69	suppressed
Ondansetron Odt	Ondansetron	68	19
Ozempic	Semaglutide	67	17
Chlorthalidone	Chlorthalidone	64	17
Tizanidine Hcl	Tizanidine Hcl	62	22
Finasteride	Finasteride	57	19
Nystatin	Nystatin	57	22
Ezetimibe	Ezetimibe	56	19
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	55	18
Colchicine	Colchicine	52	20
Metformin Hcl Er	Metformin Hcl	52	17
Baclofen	Baclofen	51	17
Buspirone Hcl	Buspirone Hcl	50	18
Mupirocin	Mupirocin	50	30
Naproxen	Naproxen	50	20
Quetiapine Fumarate	Quetiapine Fumarate	46	12
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	44	suppressed
Meclizine Hcl	Meclizine Hcl	41	15
Warfarin Sodium	Warfarin Sodium	41	suppressed
Trulicity	Dulaglutide	40	suppressed
Alendronate Sodium	Alendronate Sodium	39	11
Amitriptyline Hcl	Amitriptyline Hcl	39	suppressed
Bisoprolol-Hydrochlorothiazide	Bisoprolol/Hydrochlorothiazide	39	suppressed
Bumetanide	Bumetanide	39	11
Glimepiride	Glimepiride	39	14
Oxybutynin Chloride	Oxybutynin Chloride	39	suppressed
Levetiracetam	Levetiracetam	38	suppressed
Mirtazapine	Mirtazapine	38	11
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	37	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	37	12
Valsartan	Valsartan	37	13
Venlafaxine Hcl Er	Venlafaxine Hcl	37	suppressed
Clonazepam	Clonazepam	36	suppressed
Synthroid	Levothyroxine Sodium	36	11
Glipizide	Glipizide	35	suppressed
Xarelto	Rivaroxaban	35	13
Bupropion Hcl Sr	Bupropion Hcl	33	14
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	33	14
Promethazine Hcl	Promethazine Hcl	32	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	31	suppressed
Clonidine Hcl	Clonidine Hcl	31	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	31	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	31	suppressed
Ventolin Hfa	Albuterol Sulfate	31	12
Ibuprofen	Ibuprofen	30	12
Donepezil Hcl	Donepezil Hcl	29	suppressed
Doxepin Hcl	Doxepin Hcl	29	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	29	suppressed
Lactulose	Lactulose	29	suppressed
Methocarbamol	Methocarbamol	29	suppressed
Topiramate	Topiramate	29	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	28	suppressed
Benazepril Hcl	Benazepril Hcl	27	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	26	12
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	25	suppressed
Divalproex Sodium	Divalproex Sodium	24	suppressed
Doxycycline Hyclate	Doxycycline Hyclate	24	22
Farxiga	Dapagliflozin Propanediol	24	suppressed
Glipizide Er	Glipizide	24	suppressed
Humalog Kwikpen U-100	Insulin Lispro	23	suppressed
Diazepam	Diazepam	22	suppressed
Meloxicam	Meloxicam	22	suppressed
Amoxicillin	Amoxicillin	21	17
Breo Ellipta	Fluticasone/Vilanterol	21	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	21	suppressed
Droplet Pen Needle	Pen Needle, Diabetic	21	suppressed
Olanzapine	Olanzapine	21	suppressed
Ondansetron Hcl	Ondansetron Hcl	21	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	20	suppressed
Cefuroxime	Cefuroxime Axetil	20	14
Lorazepam	Lorazepam	20	suppressed
Propranolol Hcl	Propranolol Hcl	20	suppressed
Varenicline Tartrate	Varenicline Tartrate	20	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	19	suppressed
Lovastatin	Lovastatin	19	suppressed
Metolazone	Metolazone	19	suppressed
Paroxetine Hcl	Paroxetine Hcl	19	suppressed
Symbicort	Budesonide/Formoterol Fumarate	19	suppressed
Bupropion Xl	Bupropion Hcl	18	suppressed
Cephalexin	Cephalexin	18	15
Ketoconazole	Ketoconazole	18	suppressed
Ropinirole Hcl	Ropinirole Hcl	18	suppressed
Sucralfate	Sucralfate	18	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	17	suppressed
Atenolol	Atenolol	16	suppressed
Bupropion Hcl	Bupropion Hcl	16	suppressed
Esomeprazole Magnesium	Esomeprazole Magnesium	16	suppressed
Memantine Hcl	Memantine Hcl	16	suppressed
Nifedipine Er	Nifedipine	16	suppressed
Tramadol Hcl	Tramadol Hcl	16	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	15	suppressed
Ipratropium Bromide	Ipratropium Bromide	15	suppressed
Olmesartan-Hydrochlorothiazide	Olmesartan/Hydrochlorothiazide	15	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	14	suppressed
Terazosin Hcl	Terazosin Hcl	14	suppressed
Valacyclovir	Valacyclovir Hcl	14	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	14	suppressed
Atrovent Hfa	Ipratropium Bromide	13	suppressed
Clindamycin Hcl	Clindamycin Hcl	13	11
Enalapril Maleate	Enalapril Maleate	13	suppressed
Hydrocortisone	Hydrocortisone	13	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	13	11
Olmesartan Medoxomil	Olmesartan Medoxomil	13	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	13	suppressed
Phenytoin	Phenytoin	13	suppressed
Ramipril	Ramipril	13	suppressed
Rizatriptan	Rizatriptan Benzoate	13	suppressed
Amlodipine-Valsartan	Amlodipine Besylate/Valsartan	12	suppressed
Celecoxib	Celecoxib	12	suppressed
Dexilant	Dexlansoprazole	12	suppressed
Fluconazole	Fluconazole	12	suppressed
Hydroxyzine Pamoate	Hydroxyzine Pamoate	12	suppressed
Lansoprazole	Lansoprazole	12	suppressed
Phenobarbital	Phenobarbital	12	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	12	suppressed
Prochlorperazine Maleate	Prochlorperazine Maleate	12	suppressed
Entresto	Sacubitril/Valsartan	11	suppressed
Estradiol	Estradiol	11	suppressed
Indomethacin	Indomethacin	11	suppressed
Methylphenidate Hcl	Methylphenidate Hcl	11	suppressed
Savella	Milnacipran Hcl	11	suppressed
Spironolactone-Hctz	Spironolact/Hydrochlorothiazid	11	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	11	11
Wixela Inhub	Fluticasone Propion/Salmeterol	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