Healthcare provider profile · identity verified

David Chiu, MD

Internal Medicine · BELLFLOWER, CA · NPI 1194892075

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	612	239
Amlodipine Besylate	Amlodipine Besylate	339	126
Metformin Hcl	Metformin Hcl	331	131
Losartan Potassium	Losartan Potassium	283	107
Lisinopril	Lisinopril	277	104
Glipizide	Glipizide	246	80
Rosuvastatin Calcium	Rosuvastatin Calcium	233	98
Hydrochlorothiazide	Hydrochlorothiazide	220	83
Levothyroxine Sodium	Levothyroxine Sodium	196	65
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	178	39
Omeprazole	Omeprazole	161	81
Meloxicam	Meloxicam	159	58
Atenolol	Atenolol	153	52
Simvastatin	Simvastatin	143	52
Potassium Chloride	Potassium Chloride	136	48
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	110	36
Allopurinol	Allopurinol	101	42
Metoprolol Tartrate	Metoprolol Tartrate	98	34
Tamsulosin Hcl	Tamsulosin Hcl	95	39
Alendronate Sodium	Alendronate Sodium	94	35
Pradaxa	Dabigatran Etexilate Mesylate	94	24
Hydralazine Hcl	Hydralazine Hcl	89	34
Gabapentin	Gabapentin	87	44
Furosemide	Furosemide	86	34
Metformin Hcl Er	Metformin Hcl	85	33
Jardiance	Empagliflozin	80	35
Humulin N Kwikpen	Insulin Nph Human Isophane	76	23
Pantoprazole Sodium	Pantoprazole Sodium	75	27
Albuterol Sulfate Hfa	Albuterol Sulfate	73	48
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	72	25
Lorazepam	Lorazepam	70	14
Clopidogrel	Clopidogrel Bisulfate	69	25
Bisoprolol Fumarate	Bisoprolol Fumarate	66	30
Triamcinolone Acetonide	Triamcinolone Acetonide	66	31
Terazosin Hcl	Terazosin Hcl	61	29
Duloxetine Hcl	Duloxetine Hcl	55	27
Abrysvo	Rsv Vacc, Pref A And Pref B/Pf	53	53
Finasteride	Finasteride	52	19
Trazodone Hcl	Trazodone Hcl	50	20
Ibuprofen	Ibuprofen	46	20
Ozempic	Semaglutide	44	suppressed
Prednisone	Prednisone	44	33
Eliquis	Apixaban	41	12
Spironolactone	Spironolactone	41	15
Carvedilol	Carvedilol	40	17
Spiriva Respimat	Tiotropium Bromide	39	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	37	15
Famotidine	Famotidine	35	17
Ondansetron Odt	Ondansetron	35	12
Alprazolam	Alprazolam	34	suppressed
Buspirone Hcl	Buspirone Hcl	33	suppressed
Amoxicillin	Amoxicillin	32	26
Lactulose	Lactulose	31	17
Warfarin Sodium	Warfarin Sodium	30	11
Acetaminophen-Codeine	Acetaminophen With Codeine	29	11
Humulin R	Insulin Regular, Human	29	11
Azelastine Hcl	Azelastine Hcl	28	16
Cephalexin	Cephalexin	28	26
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	27	12
Adacel Tdap	Diph,pertuss(Acell),tet Vac/Pf	26	26
Azithromycin	Azithromycin	26	24
Clonazepam	Clonazepam	26	suppressed
Ezetimibe	Ezetimibe	26	suppressed
Nifedipine Er	Nifedipine	26	suppressed
Glipizide Er	Glipizide	25	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	24	suppressed
Olanzapine	Olanzapine	24	suppressed
Veo Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	24	12
Digoxin	Digoxin	23	suppressed
Humulin N	Insulin Nph Human Isophane	23	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	23	suppressed
Colchicine	Colchicine	21	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	18	suppressed
Lovastatin	Lovastatin	18	suppressed
Naproxen	Naproxen	18	18
Venlafaxine Hcl Er	Venlafaxine Hcl	18	suppressed
Donepezil Hcl	Donepezil Hcl	17	suppressed
Hydrocortisone	Hydrocortisone	17	11
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	17	suppressed
Morphine Sulfate Er	Morphine Sulfate	17	suppressed
Xarelto	Rivaroxaban	17	suppressed
Clobetasol Propionate	Clobetasol Propionate	16	suppressed
Clonidine Hcl	Clonidine Hcl	16	suppressed
Fenofibrate	Fenofibrate	16	suppressed
Temazepam	Temazepam	16	suppressed
Naloxone Hcl	Naloxone Hcl	15	14
Tradjenta	Linagliptin	15	suppressed
Doxepin Hcl	Doxepin Hcl	14	suppressed
Fluocinonide	Fluocinonide	14	12
Montelukast Sodium	Montelukast Sodium	14	suppressed
Pravastatin Sodium	Pravastatin Sodium	14	suppressed
Tramadol Hcl	Tramadol Hcl	14	suppressed
Glipizide-Metformin	Glipizide/Metformin Hcl	13	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	13	suppressed
Levetiracetam	Levetiracetam	13	suppressed
Nitroglycerin	Nitroglycerin	13	suppressed
Sertraline Hcl	Sertraline Hcl	13	suppressed
Baclofen	Baclofen	12	suppressed
Citalopram Hbr	Citalopram Hydrobromide	12	suppressed
Metoprolol Succinate	Metoprolol Succinate	12	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	12	suppressed
Terbinafine Hcl	Terbinafine Hcl	12	suppressed
Veo Insulin Syringe	Syringe And Needle,insulin,1ml	12	suppressed
Alvesco	Ciclesonide	11	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	11	11
Chlorthalidone	Chlorthalidone	11	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	11	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	11	suppressed
Fluticasone Propionate	Fluticasone Propionate	11	suppressed
Methadone Hcl	Methadone Hcl	11	suppressed
Mirtazapine	Mirtazapine	11	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	11	suppressed
Zenpep	Lipase/Protease/Amylase	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