Healthcare provider profile · identity verified

William Yuen Tu, MD

Internal Medicine · WOODLAND HILLS, CA · NPI 1346260502

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	418	160
Amlodipine Besylate	Amlodipine Besylate	347	127
Losartan Potassium	Losartan Potassium	295	111
Rosuvastatin Calcium	Rosuvastatin Calcium	248	92
Simvastatin	Simvastatin	198	72
Lisinopril	Lisinopril	165	62
Atenolol	Atenolol	158	66
Levothyroxine Sodium	Levothyroxine Sodium	147	57
Omeprazole	Omeprazole	140	60
Metformin Hcl	Metformin Hcl	129	52
Metformin Hcl Er	Metformin Hcl	103	49
Alendronate Sodium	Alendronate Sodium	91	36
Allopurinol	Allopurinol	89	33
Albuterol Sulfate Hfa	Albuterol Sulfate	87	39
Metoprolol Tartrate	Metoprolol Tartrate	83	36
Trazodone Hcl	Trazodone Hcl	83	26
Glipizide	Glipizide	82	32
Hydrochlorothiazide	Hydrochlorothiazide	81	34
Terazosin Hcl	Terazosin Hcl	81	29
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	76	21
Pantoprazole Sodium	Pantoprazole Sodium	76	26
Gabapentin	Gabapentin	68	37
Finasteride	Finasteride	66	26
Mirtazapine	Mirtazapine	65	17
Pradaxa	Dabigatran Etexilate Mesylate	65	24
Meloxicam	Meloxicam	61	28
Tamsulosin Hcl	Tamsulosin Hcl	58	21
Potassium Chloride	Potassium Chloride	56	20
Ezetimibe	Ezetimibe	50	17
Lidocaine-Prilocaine	Lidocaine/Prilocaine	50	20
Arexvy	Rsvpref3 Antigen/As01e/Pf	41	41
Acetaminophen-Codeine	Acetaminophen With Codeine	39	12
Jardiance	Empagliflozin	39	13
Triamcinolone Acetonide	Triamcinolone Acetonide	37	26
Pravastatin Sodium	Pravastatin Sodium	35	12
Clopidogrel	Clopidogrel Bisulfate	34	16
Furosemide	Furosemide	33	11
Zolpidem Tartrate	Zolpidem Tartrate	30	suppressed
Hydrocortisone	Hydrocortisone	28	15
Lovastatin	Lovastatin	28	suppressed
Spironolactone	Spironolactone	27	12
Adacel Tdap	Diph,pertuss(Acell),tet Vac/Pf	26	26
Spiriva Respimat	Tiotropium Bromide	26	suppressed
Famotidine	Famotidine	25	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	25	11
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	25	12
Carvedilol	Carvedilol	24	11
Ibuprofen	Ibuprofen	24	suppressed
Clobetasol Propionate	Clobetasol Propionate	23	suppressed
Colchicine	Colchicine	23	14
Acyclovir	Acyclovir	22	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	22	suppressed
Lactulose	Lactulose	22	suppressed
Baclofen	Baclofen	21	suppressed
Mometasone Furoate	Mometasone Furoate	21	12
Sertraline Hcl	Sertraline Hcl	21	suppressed
Azithromycin	Azithromycin	20	19
Buspirone Hcl	Buspirone Hcl	20	suppressed
Fluticasone Propionate	Fluticasone Propionate	20	suppressed
Fenofibrate	Fenofibrate	19	suppressed
Benazepril Hcl	Benazepril Hcl	18	suppressed
Humulin N	Insulin Nph Human Isophane	18	suppressed
Alvesco	Ciclesonide	17	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	17	suppressed
Metoprolol Succinate	Metoprolol Succinate	17	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	17	suppressed
Alprazolam	Alprazolam	16	suppressed
Estradiol	Estradiol	16	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	15	suppressed
Lorazepam	Lorazepam	15	suppressed
Tizanidine Hcl	Tizanidine Hcl	15	suppressed
Tramadol Hcl	Tramadol Hcl	15	suppressed
Chlorhexidine Gluconate	Chlorhexidine Gluconate	14	suppressed
Clonazepam	Clonazepam	14	suppressed
Donepezil Hcl	Donepezil Hcl	13	suppressed
Duloxetine Hcl	Duloxetine Hcl	13	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	12	12
Citalopram Hbr	Citalopram Hydrobromide	12	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	12	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	12	suppressed
Montelukast Sodium	Montelukast Sodium	12	suppressed
Morphine Sulfate Er	Morphine Sulfate	12	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	12	suppressed
Ondansetron Odt	Ondansetron	12	suppressed
Testosterone	Testosterone	12	suppressed
Xarelto	Rivaroxaban	12	suppressed
Eliquis	Apixaban	11	suppressed
Hydralazine Hcl	Hydralazine Hcl	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