Healthcare provider profile · identity verified

Joseph D Chun, M.D.

Internal Medicine · FULLERTON, CA · NPI 1710015425

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	973	282
Losartan Potassium	Losartan Potassium	885	250
Amlodipine Besylate	Amlodipine Besylate	816	236
Rosuvastatin Calcium	Rosuvastatin Calcium	605	199
Metformin Hcl	Metformin Hcl	509	136
Levothyroxine Sodium	Levothyroxine Sodium	366	96
Creon	Lipase/Protease/Amylase	327	61
Simvastatin	Simvastatin	308	82
Vascepa	Icosapent Ethyl	252	42
Omeprazole	Omeprazole	250	77
Metoprolol Succinate	Metoprolol Succinate	245	57
Tamsulosin Hcl	Tamsulosin Hcl	238	80
Meloxicam	Meloxicam	187	44
Alendronate Sodium	Alendronate Sodium	185	57
Januvia	Sitagliptin Phosphate	179	27
Jardiance	Empagliflozin	177	36
Fluticasone Propionate	Fluticasone Propionate	174	70
Azelastine Hcl	Azelastine Hcl	168	61
Famotidine	Famotidine	159	55
Finasteride	Finasteride	157	56
Lisinopril	Lisinopril	157	48
Zolpidem Tartrate	Zolpidem Tartrate	143	46
Alprazolam	Alprazolam	138	37
Clopidogrel	Clopidogrel Bisulfate	131	38
Triamcinolone Acetonide	Triamcinolone Acetonide	119	55
Gabapentin	Gabapentin	113	46
Pioglitazone Hcl	Pioglitazone Hcl	98	31
Diclofenac Sodium	Diclofenac Sodium	95	43
Azithromycin	Azithromycin	94	75
Pantoprazole Sodium	Pantoprazole Sodium	92	32
Donepezil Hcl	Donepezil Hcl	79	27
Ketoconazole	Ketoconazole	79	22
Oxybutynin Chloride	Oxybutynin Chloride	78	22
Lantus Solostar	Insulin Glargine,hum.Rec.Anlog	75	22
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	73	23
Atenolol	Atenolol	71	18
Eliquis	Apixaban	71	14
Lidocaine	Lidocaine	68	20
Farxiga	Dapagliflozin Propanediol	67	11
Celecoxib	Celecoxib	66	20
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	65	15
Ozempic	Semaglutide	65	14
Sertraline Hcl	Sertraline Hcl	64	12
Valsartan	Valsartan	64	19
Albuterol Sulfate Hfa	Albuterol Sulfate	61	22
Janumet	Sitagliptin Phos/Metformin Hcl	61	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	61	42
Montelukast Sodium	Montelukast Sodium	57	18
Pravastatin Sodium	Pravastatin Sodium	57	16
Levocetirizine Dihydrochloride	Levocetirizine Dihydrochloride	56	15
Xarelto	Rivaroxaban	54	suppressed
Zenpep	Lipase/Protease/Amylase	53	12
Memantine Hcl	Memantine Hcl	52	15
Furosemide	Furosemide	51	17
Dexlansoprazole Dr	Dexlansoprazole	50	12
Hydrochlorothiazide	Hydrochlorothiazide	49	19
Nitroglycerin	Nitroglycerin	49	35
Allopurinol	Allopurinol	48	13
Benazepril Hcl	Benazepril Hcl	44	11
Trulicity	Dulaglutide	43	suppressed
Metformin Hcl Er	Metformin Hcl	42	16
Prolia	Denosumab	42	28
Carvedilol	Carvedilol	40	14
Fluticasone-Salmeterol	Fluticasone Propion/Salmeterol	40	suppressed
Glimepiride	Glimepiride	39	11
Fenofibrate	Fenofibrate,micronized	37	15
Paxlovid	Nirmatrelvir/Ritonavir	37	36
Metoprolol Tartrate	Metoprolol Tartrate	36	suppressed
Testosterone Cypionate	Testosterone Cypionate	36	suppressed
Lovastatin	Lovastatin	35	suppressed
Megestrol Acetate	Megestrol Acetate	35	15
Repatha Sureclick	Evolocumab	35	suppressed
Glipizide Er	Glipizide	31	suppressed
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	31	suppressed
Glipizide	Glipizide	30	suppressed
Hydralazine Hcl	Hydralazine Hcl	30	suppressed
Pregabalin	Pregabalin	30	suppressed
Ciclopirox	Ciclopirox	29	11
Escitalopram Oxalate	Escitalopram Oxalate	29	suppressed
Linzess	Linaclotide	29	suppressed
Ultra-Fine Nano Pen Needle	Pen Needle, Diabetic	28	suppressed
Vemlidy	Tenofovir Alafenamide	28	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	27	24
Doxepin Hcl	Doxepin Hcl	27	suppressed
Potassium Chloride	Potassium Chloride	27	suppressed
Trazodone Hcl	Trazodone Hcl	27	13
Valacyclovir	Valacyclovir Hcl	27	11
Ezetimibe	Ezetimibe	26	suppressed
Fenofibrate	Fenofibrate Nanocrystallized	26	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	26	suppressed
Ibandronate Sodium	Ibandronate Sodium	25	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	25	suppressed
Duloxetine Hcl	Duloxetine Hcl	24	suppressed
Icosapent Ethyl	Icosapent Ethyl	24	12
Lokelma	Sodium Zirconium Cyclosilicate	24	suppressed
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	23	suppressed
Olmesartan Medoxomil	Olmesartan Medoxomil	22	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	22	suppressed
Dutasteride	Dutasteride	21	suppressed
Sodium Chloride	0.9 % Sodium Chloride	21	18
Synthroid	Levothyroxine Sodium	21	suppressed
Amoxicillin	Amoxicillin	20	17
Breo Ellipta	Fluticasone/Vilanterol	20	suppressed
Nifedipine Er	Nifedipine	20	suppressed
Propranolol Hcl	Propranolol Hcl	20	suppressed
Sildenafil Citrate	Sildenafil Citrate	20	suppressed
Atrovent Hfa	Ipratropium Bromide	19	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	19	15
Glipizide-Metformin	Glipizide/Metformin Hcl	19	suppressed
Ipratropium Bromide	Ipratropium Bromide	19	suppressed
Midodrine Hcl	Midodrine Hcl	19	suppressed
Tramadol Hcl	Tramadol Hcl	19	suppressed
Ventolin Hfa	Albuterol Sulfate	19	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	18	suppressed
Lorazepam	Lorazepam	18	suppressed
Meclizine Hcl	Meclizine Hcl	18	12
Wixela Inhub	Fluticasone Propion/Salmeterol	18	suppressed
Hydrocortisone	Hydrocortisone	17	13
Procto-Med Hc	Hydrocortisone	17	suppressed
Sucralfate	Sucralfate	17	suppressed
Synjardy	Empagliflozin/Metformin Hcl	17	suppressed
Belsomra	Suvorexant	16	suppressed
Clobetasol Propionate	Clobetasol Propionate	16	suppressed
Clonidine Hcl	Clonidine Hcl	16	suppressed
Janumet Xr	Sitagliptin Phos/Metformin Hcl	16	suppressed
Levemir Flexpen	Insulin Detemir	16	suppressed
Prednisone	Prednisone	16	14
Amiodarone Hcl	Amiodarone Hcl	15	suppressed
Cephalexin	Cephalexin	15	14
Fenofibrate	Fenofibrate	15	suppressed
Fluocinonide	Fluocinonide	15	suppressed
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	15	suppressed
Myrbetriq	Mirabegron	15	suppressed
Ondansetron Hcl	Ondansetron Hcl	15	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	15	12
Telmisartan	Telmisartan	15	suppressed
Alcohol Prep Pads	Alcohol Antiseptic Pads	14	suppressed
Betamethasone Dipropionate	Betamethasone Dipropionate	14	suppressed
Ciclopirox	Ciclopirox Olamine	14	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	14	suppressed
Ibuprofen	Ibuprofen	14	suppressed
Labetalol Hcl	Labetalol Hcl	14	suppressed
Nebivolol Hcl	Nebivolol Hcl	14	suppressed
Novolog Flexpen	Insulin Aspart	14	suppressed
Ondansetron Odt	Ondansetron	14	suppressed
Shingrix	Varicella-Zoster Ge/As01b/Pf	14	12
Ulticare Pen Needle	Pen Needle, Diabetic	14	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	14	suppressed
Amlodipine Besylate-Benazepril	Amlodipine Besylate/Benazepril	13	suppressed
Bydureon Bcise	Exenatide Microspheres	13	suppressed
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	13	suppressed
Prempro	Estrogen,con/M-Progest Acet	13	suppressed
Diazepam	Diazepam	12	suppressed
Latanoprost	Latanoprost	12	suppressed
Nano 2nd Gen Pen Needle	Pen Needle, Diabetic	12	suppressed
Repatha Syringe	Evolocumab	12	suppressed
Brimonidine Tartrate	Brimonidine Tartrate	11	suppressed
Citalopram Hbr	Citalopram Hydrobromide	11	suppressed
Mupirocin	Mupirocin	11	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	11	suppressed
Raloxifene Hcl	Raloxifene Hcl	11	suppressed
Tradjenta	Linagliptin	11	suppressed
Warfarin Sodium	Warfarin Sodium	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