Healthcare provider profile · identity verified

Choon-Weng Chan, M.D.

Internal Medicine · ELK GROVE, CA · NPI 1528088937

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	945	248
Amlodipine Besylate	Amlodipine Besylate	623	178
Losartan Potassium	Losartan Potassium	388	119
Tamsulosin Hcl	Tamsulosin Hcl	319	83
Lisinopril	Lisinopril	288	75
Metformin Hcl	Metformin Hcl	277	73
Metoprolol Succinate	Metoprolol Succinate	242	61
Levothyroxine Sodium	Levothyroxine Sodium	237	58
Telmisartan	Telmisartan	225	68
Omeprazole	Omeprazole	191	61
Pravastatin Sodium	Pravastatin Sodium	177	59
Ozempic	Semaglutide	167	41
Metoprolol Tartrate	Metoprolol Tartrate	161	42
Gabapentin	Gabapentin	154	46
Albuterol Sulfate Hfa	Albuterol Sulfate	148	42
Fluticasone Propionate	Fluticasone Propionate	146	59
Finasteride	Finasteride	133	30
Furosemide	Furosemide	133	38
Hydrochlorothiazide	Hydrochlorothiazide	129	42
Pantoprazole Sodium	Pantoprazole Sodium	120	28
Rosuvastatin Calcium	Rosuvastatin Calcium	116	37
Simvastatin	Simvastatin	116	32
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	115	31
Clopidogrel	Clopidogrel Bisulfate	107	25
Alendronate Sodium	Alendronate Sodium	104	36
Allopurinol	Allopurinol	102	28
Metformin Hcl Er	Metformin Hcl	102	33
Trazodone Hcl	Trazodone Hcl	101	27
Carvedilol	Carvedilol	96	29
Spironolactone	Spironolactone	96	18
Eliquis	Apixaban	92	23
Famotidine	Famotidine	84	25
Montelukast Sodium	Montelukast Sodium	83	18
Citalopram Hbr	Citalopram Hydrobromide	79	19
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	77	19
Hydralazine Hcl	Hydralazine Hcl	72	19
Diclofenac Sodium	Diclofenac Sodium	70	31
Meloxicam	Meloxicam	68	24
Triamcinolone Acetonide	Triamcinolone Acetonide	68	36
Atenolol	Atenolol	66	20
Glipizide	Glipizide	66	25
Tramadol Hcl	Tramadol Hcl	63	15
Mirtazapine	Mirtazapine	61	25
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	59	13
Clonazepam	Clonazepam	56	11
Donepezil Hcl	Donepezil Hcl	53	16
Propranolol Hcl	Propranolol Hcl	52	12
Levetiracetam	Levetiracetam	51	12
Zolpidem Tartrate	Zolpidem Tartrate	51	12
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	49	20
Potassium Chloride	Potassium Chloride	47	11
Trulicity	Dulaglutide	46	suppressed
Alprazolam	Alprazolam	45	12
Hydroxyzine Hcl	Hydroxyzine Hcl	45	18
Lovastatin	Lovastatin	43	11
Benazepril Hcl	Benazepril Hcl	42	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	42	suppressed
Tradjenta	Linagliptin	41	suppressed
Valsartan	Valsartan	41	16
Latanoprost	Latanoprost	40	11
Chlorthalidone	Chlorthalidone	39	suppressed
Glipizide Er	Glipizide	38	12
Jardiance	Empagliflozin	37	12
Diazepam	Diazepam	36	suppressed
Januvia	Sitagliptin Phosphate	36	13
Quetiapine Fumarate	Quetiapine Fumarate	35	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	34	suppressed
Duloxetine Hcl	Duloxetine Hcl	33	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	33	13
Primidone	Primidone	33	suppressed
Xarelto	Rivaroxaban	33	11
Amitriptyline Hcl	Amitriptyline Hcl	32	suppressed
Naproxen	Naproxen	32	12
Pregabalin	Pregabalin	32	15
Baclofen	Baclofen	31	12
Warfarin Sodium	Warfarin Sodium	31	suppressed
Ezetimibe	Ezetimibe	30	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	30	11
Indapamide	Indapamide	29	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	29	suppressed
Glimepiride	Glimepiride	28	suppressed
Terazosin Hcl	Terazosin Hcl	28	suppressed
Mesalamine Dr	Mesalamine	27	suppressed
Paroxetine Hcl	Paroxetine Hcl	27	suppressed
Ultra-Fine Short Pen Needle	Pen Needle, Diabetic	27	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	27	suppressed
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	26	suppressed
Oxycodone Hcl	Oxycodone Hcl	26	suppressed
Trifluoperazine Hcl	Trifluoperazine Hcl	26	suppressed
Ventolin Hfa	Albuterol Sulfate	26	suppressed
Azelastine Hcl	Azelastine Hcl	25	17
Buspirone Hcl	Buspirone Hcl	25	suppressed
Fenofibrate	Fenofibrate	25	suppressed
Amiodarone Hcl	Amiodarone Hcl	24	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	24	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	24	11
Esomeprazole Magnesium	Esomeprazole Magnesium	23	suppressed
Clobetasol Propionate	Clobetasol Propionate	22	18
Spiriva Respimat	Tiotropium Bromide	22	suppressed
Synthroid	Levothyroxine Sodium	22	suppressed
Divalproex Sodium Er	Divalproex Sodium	21	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	21	suppressed
Azithromycin	Azithromycin	20	19
Clonidine Hcl	Clonidine Hcl	20	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	20	suppressed
Ipratropium Bromide	Ipratropium Bromide	20	suppressed
Ketoconazole	Ketoconazole	20	13
Linzess	Linaclotide	20	suppressed
Ultra-Fine Mini Pen Needle	Pen Needle, Diabetic	20	suppressed
Nifedipine Er	Nifedipine	19	suppressed
Prednisone	Prednisone	19	suppressed
Ropinirole Hcl	Ropinirole Hcl	19	suppressed
Timolol Maleate	Timolol Maleate	19	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	19	suppressed
Farxiga	Dapagliflozin Propanediol	18	suppressed
Lactulose	Lactulose	17	suppressed
Lantus	Insulin Glargine,hum.Rec.Anlog	17	suppressed
Levofloxacin	Levofloxacin	17	suppressed
Mounjaro	Tirzepatide	17	suppressed
Toujeo Solostar	Insulin Glargine,hum.Rec.Anlog	17	suppressed
Breo Ellipta	Fluticasone/Vilanterol	16	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	16	suppressed
Humalog Kwikpen U-100	Insulin Lispro	16	suppressed
Hydrocortisone	Hydrocortisone	16	suppressed
Ibuprofen	Ibuprofen	16	suppressed
Methotrexate	Methotrexate Sodium	16	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	16	suppressed
Acarbose	Acarbose	15	suppressed
Acyclovir	Acyclovir	15	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	15	suppressed
Digoxin	Digoxin	15	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	15	suppressed
Lorazepam	Lorazepam	15	suppressed
Propafenone Hcl	Propafenone Hcl	15	suppressed
Aripiprazole	Aripiprazole	14	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	14	suppressed
Lamotrigine	Lamotrigine	14	suppressed
Telmisartan-Amlodipine	Telmisartan/Amlodipine	14	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	13	suppressed
Benztropine Mesylate	Benztropine Mesylate	13	suppressed
Glyxambi	Empagliflozin/Linagliptin	13	suppressed
Incruse Ellipta	Umeclidinium Bromide	13	suppressed
Insulin Lispro Kwikpen U-100	Insulin Lispro	13	suppressed
Irbesartan	Irbesartan	13	suppressed
Labetalol Hcl	Labetalol Hcl	13	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	13	suppressed
Rybelsus	Semaglutide	13	suppressed
Wixela Inhub	Fluticasone Propion/Salmeterol	13	suppressed
Amlodipine-Olmesartan	Amlodipine Bes/Olmesartan Med	12	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	12	11
Colchicine	Colchicine	12	suppressed
Fenofibrate	Fenofibrate,micronized	12	suppressed
Folic Acid	Folic Acid	12	suppressed
Hydroxychloroquine Sulfate	Hydroxychloroquine Sulfate	12	suppressed
Bydureon Bcise	Exenatide Microspheres	11	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	11	suppressed
Dorzolamide-Timolol	Dorzolamide/Timolol/Pf	11	suppressed
Eszopiclone	Eszopiclone	11	suppressed
Novolin R	Insulin Regular, Human	11	suppressed
Pramipexole Dihydrochloride	Pramipexole Di-Hcl	11	suppressed
Sertraline Hcl	Sertraline Hcl	11	suppressed
Synjardy Xr	Empagliflozin/Metformin 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