Healthcare provider profile · identity verified

Chok Ping Wan, M.D.

Internal Medicine · LONG BEACH, CA · NPI 1346346616

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	589	140
Amlodipine Besylate	Amlodipine Besylate	383	90
Tamsulosin Hcl	Tamsulosin Hcl	296	45
Gabapentin	Gabapentin	283	42
Eliquis	Apixaban	238	30
Metformin Hcl	Metformin Hcl	211	48
Baclofen	Baclofen	205	36
Famotidine	Famotidine	203	25
Losartan Potassium	Losartan Potassium	203	48
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	197	32
Metoprolol Tartrate	Metoprolol Tartrate	190	33
Lisinopril	Lisinopril	176	36
Levetiracetam	Levetiracetam	171	25
Levothyroxine Sodium	Levothyroxine Sodium	152	25
Finasteride	Finasteride	147	22
Furosemide	Furosemide	126	35
Mirtazapine	Mirtazapine	125	29
Pantoprazole Sodium	Pantoprazole Sodium	123	33
Pravastatin Sodium	Pravastatin Sodium	119	22
Omeprazole	Omeprazole	105	20
Clopidogrel	Clopidogrel Bisulfate	100	21
Quetiapine Fumarate	Quetiapine Fumarate	95	16
Tizanidine Hcl	Tizanidine Hcl	86	26
Metoprolol Succinate	Metoprolol Succinate	85	27
Allopurinol	Allopurinol	81	19
Diltiazem Hcl	Diltiazem Hcl	79	suppressed
Potassium Chloride	Potassium Chloride	74	17
Carvedilol	Carvedilol	72	19
Tramadol Hcl	Tramadol Hcl	70	18
Insulin Lispro Kwikpen U-100	Insulin Lispro	69	21
Donepezil Hcl	Donepezil Hcl	68	suppressed
Rosuvastatin Calcium	Rosuvastatin Calcium	66	16
Buspirone Hcl	Buspirone Hcl	64	12
Latanoprost	Latanoprost	63	11
Albuterol Sulfate Hfa	Albuterol Sulfate	62	18
Propranolol Hcl	Propranolol Hcl	62	16
Lorazepam	Lorazepam	59	14
Dantrolene Sodium	Dantrolene Sodium	54	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	54	12
Nifedipine Er	Nifedipine	50	14
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	49	16
Nateglinide	Nateglinide	45	suppressed
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	44	11
Amiodarone Hcl	Amiodarone Hcl	43	suppressed
Midodrine Hcl	Midodrine Hcl	43	12
Acetaminophen-Codeine	Acetaminophen With Codeine	42	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	41	suppressed
Valsartan	Valsartan	38	12
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	36	suppressed
Glipizide	Glipizide	36	suppressed
Methocarbamol	Methocarbamol	36	suppressed
Simvastatin	Simvastatin	36	suppressed
Trazodone Hcl	Trazodone Hcl	35	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	33	suppressed
Fluticasone Propionate	Fluticasone Propionate	33	suppressed
Hydralazine Hcl	Hydralazine Hcl	33	suppressed
Memantine Hcl	Memantine Hcl	32	suppressed
Tradjenta	Linagliptin	32	suppressed
Duloxetine Hcl	Duloxetine Hcl	31	suppressed
Januvia	Sitagliptin Phosphate	31	suppressed
Diclofenac Sodium	Diclofenac Sodium	30	suppressed
Humalog Kwikpen U-100	Insulin Lispro	30	suppressed
Carbidopa-Levodopa	Carbidopa/Levodopa	29	suppressed
Digoxin	Digoxin	29	suppressed
Lactulose	Lactulose	29	suppressed
Meclizine Hcl	Meclizine Hcl	29	suppressed
Albuterol Sulfate	Albuterol Sulfate	28	suppressed
Prazosin Hcl	Prazosin Hcl	28	suppressed
Humulin R	Insulin Regular, Human	27	suppressed
Hydrochlorothiazide	Hydrochlorothiazide	26	suppressed
Monoject Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	26	suppressed
Zenpep	Lipase/Protease/Amylase	26	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	25	suppressed
Ipratropium-Albuterol	Ipratropium/Albuterol Sulfate	25	17
Lacosamide	Lacosamide	25	suppressed
Lidocaine	Lidocaine	25	suppressed
Zolpidem Tartrate	Zolpidem Tartrate	25	suppressed
Divalproex Sodium	Divalproex Sodium	24	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	24	suppressed
Flecainide Acetate	Flecainide Acetate	24	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	23	suppressed
Clonazepam	Clonazepam	23	suppressed
Prednisone	Prednisone	23	20
Procrit	Epoetin Alfa	23	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	23	17
Triamcinolone Acetonide	Triamcinolone Acetonide	23	11
Benztropine Mesylate	Benztropine Mesylate	22	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	22	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	22	suppressed
Spiriva Respimat	Tiotropium Bromide	22	suppressed
Spironolactone	Spironolactone	22	suppressed
Alfuzosin Hcl Er	Alfuzosin Hcl	21	suppressed
Sertraline Hcl	Sertraline Hcl	21	suppressed
Timolol Maleate	Timolol Maleate	21	suppressed
Arexvy	Rsvpref3 Antigen/As01e/Pf	20	20
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	19	suppressed
Olanzapine	Olanzapine	19	suppressed
Repaglinide	Repaglinide	19	suppressed
Risperidone	Risperidone	19	suppressed
Santyl	Collagenase Clostridium Hist.	18	suppressed
Breo Ellipta	Fluticasone/Vilanterol	17	suppressed
Brinzolamide	Brinzolamide	17	suppressed
Dicyclomine Hcl	Dicyclomine Hcl	17	suppressed
Cephalexin	Cephalexin	16	suppressed
Enulose	Lactulose	16	suppressed
Ibuprofen	Ibuprofen	16	suppressed
Montelukast Sodium	Montelukast Sodium	16	suppressed
Sildenafil Citrate	Sildenafil Citrate	16	suppressed
Terazosin Hcl	Terazosin Hcl	16	suppressed
Bupropion Hcl	Bupropion Hcl	15	suppressed
Escitalopram Oxalate	Escitalopram Oxalate	15	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	15	suppressed
Avonex (4 Pack)	Interferon Beta-1a	14	suppressed
Budesonide Dr	Budesonide	14	suppressed
Citalopram Hbr	Citalopram Hydrobromide	14	suppressed
Dorzolamide-Timolol	Dorzolamide Hcl/Timolol Maleat	14	suppressed
Entresto	Sacubitril/Valsartan	14	suppressed
Haloperidol	Haloperidol	14	suppressed
Phenobarbital	Phenobarbital	14	suppressed
Phenytoin Sodium Extended	Phenytoin Sodium Extended	14	suppressed
Sucralfate	Sucralfate	14	suppressed
Venlafaxine Hcl	Venlafaxine Hcl	14	suppressed
Xarelto	Rivaroxaban	14	suppressed
Balsalazide Disodium	Balsalazide Disodium	13	suppressed
Clonidine Hcl	Clonidine Hcl	13	suppressed
Enoxaparin Sodium	Enoxaparin Sodium	13	suppressed
Ipratropium Bromide	Ipratropium Bromide	13	suppressed
Labetalol Hcl	Labetalol Hcl	13	suppressed
Levemir Flexpen	Insulin Detemir	13	suppressed
Pregabalin	Pregabalin	13	suppressed
Sodium Chloride	0.9 % Sodium Chloride	13	suppressed
Alogliptin	Alogliptin Benzoate	12	suppressed
Amantadine	Amantadine Hcl	12	suppressed
Biktarvy	Bictegrav/Emtricit/Tenofov Ala	12	suppressed
Carbamazepine	Carbamazepine	12	suppressed
Cilostazol	Cilostazol	12	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	12	suppressed
Fenofibrate	Fenofibrate	12	suppressed
Humalog	Insulin Lispro	12	suppressed
Levemir	Insulin Detemir	12	suppressed
Meloxicam	Meloxicam	12	suppressed
Nystatin	Nystatin	12	suppressed
Ropinirole Hcl	Ropinirole Hcl	12	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	12	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	11	suppressed
Calcium Acetate	Calcium Acetate	11	suppressed
Farxiga	Dapagliflozin Propanediol	11	suppressed
Primidone	Primidone	11	suppressed
Sevelamer Carbonate	Sevelamer Carbonate	11	suppressed
Travoprost	Travoprost	11	suppressed
Verapamil Er	Verapamil 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