Healthcare provider profile · identity verified

Kevin Chen, M.D.

Internal Medicine · OAKLAND, CA · NPI 1235300658

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	721	253
Amlodipine Besylate	Amlodipine Besylate	441	158
Lisinopril	Lisinopril	364	126
Losartan Potassium	Losartan Potassium	330	117
Levothyroxine Sodium	Levothyroxine Sodium	307	100
Simvastatin	Simvastatin	250	78
Tamsulosin Hcl	Tamsulosin Hcl	227	78
Metformin Hcl Er	Metformin Hcl	184	64
Atenolol	Atenolol	181	64
Gabapentin	Gabapentin	166	70
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	149	28
Metoprolol Succinate	Metoprolol Succinate	140	51
Famotidine	Famotidine	133	53
Furosemide	Furosemide	131	44
Fluticasone Propionate	Fluticasone Propionate	126	55
Metoprolol Tartrate	Metoprolol Tartrate	124	47
Trazodone Hcl	Trazodone Hcl	120	42
Pantoprazole Sodium	Pantoprazole Sodium	115	39
Albuterol Sulfate Hfa	Albuterol Sulfate	114	60
Prednisone	Prednisone	113	58
Metformin Hcl	Metformin Hcl	102	43
Omeprazole	Omeprazole	100	42
Sertraline Hcl	Sertraline Hcl	97	30
Alendronate Sodium	Alendronate Sodium	95	37
Finasteride	Finasteride	91	32
Lorazepam	Lorazepam	91	20
Potassium Chloride	Potassium Chloride	90	28
Wixela Inhub	Fluticasone Propion/Salmeterol	85	55
Azelastine Hcl	Azelastine Hcl	82	37
Pradaxa	Dabigatran Etexilate Mesylate	80	30
Glipizide	Glipizide	77	29
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	77	13
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	76	24
Pravastatin Sodium	Pravastatin Sodium	71	25
Terazosin Hcl	Terazosin Hcl	70	22
Glipizide Er	Glipizide	69	26
Ibuprofen	Ibuprofen	67	30
Celecoxib	Celecoxib	66	37
Triamcinolone Acetonide	Triamcinolone Acetonide	66	37
Allopurinol	Allopurinol	62	25
Carvedilol	Carvedilol	62	20
Hydrochlorothiazide	Hydrochlorothiazide	62	27
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	62	25
Temazepam	Temazepam	62	19
Shingrix	Varicella-Zoster Ge/As01b/Pf	61	50
Ozempic	Semaglutide	60	12
Zolpidem Tartrate	Zolpidem Tartrate	60	11
Alvesco	Ciclesonide	59	22
Hydralazine Hcl	Hydralazine Hcl	54	19
Lovastatin	Lovastatin	52	17
Amoxicillin	Amoxicillin	49	28
Propranolol Hcl	Propranolol Hcl	46	15
Acyclovir	Acyclovir	45	22
Jardiance	Empagliflozin	44	17
Naproxen	Naproxen	44	24
Montelukast Sodium	Montelukast Sodium	41	19
Ondansetron Odt	Ondansetron	41	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	40	11
Diltiazem 24hr Er (Cd)	Diltiazem Hcl	39	17
Spiriva Respimat	Tiotropium Bromide	36	suppressed
Azithromycin	Azithromycin	35	30
Fluoxetine Hcl	Fluoxetine Hcl	35	12
Rosuvastatin Calcium	Rosuvastatin Calcium	34	18
Arexvy	Rsvpref3 Antigen/As01e/Pf	33	33
Fluorouracil	Fluorouracil	33	26
Clopidogrel	Clopidogrel Bisulfate	32	14
Fluocinonide	Fluocinonide	31	20
Tizanidine Hcl	Tizanidine Hcl	29	suppressed
Boostrix Tdap	Diphth,pertuss(Acell),tet Vac	28	28
Proctofoam-Hc	Hydrocortisone/Pramoxine	28	suppressed
Cefadroxil	Cefadroxil	26	23
Humulin N	Insulin Nph Human Isophane	26	suppressed
Insulin Glargine-Yfgn	Insulin Glargine-Yfgn	26	suppressed
Metronidazole	Metronidazole	26	11
Alprazolam	Alprazolam	25	suppressed
Hydrocortisone	Hydrocortisone	25	suppressed
Citalopram Hbr	Citalopram Hydrobromide	24	suppressed
Ondansetron Hcl	Ondansetron Hcl	24	suppressed
Pregabalin	Pregabalin	24	suppressed
Terbinafine Hcl	Terbinafine Hcl	24	15
Valacyclovir	Valacyclovir Hcl	24	suppressed
Ciprofloxacin Hcl	Ciprofloxacin Hcl	23	18
Spironolactone	Spironolactone	23	suppressed
Warfarin Sodium	Warfarin Sodium	23	suppressed
Morphine Sulfate Er	Morphine Sulfate	22	suppressed
Veo Insulin Syringe	Syringe-Needle,insulin,0.5 Ml	22	suppressed
Isosorbide Mononitrate Er	Isosorbide Mononitrate	21	suppressed
Tramadol Hcl	Tramadol Hcl	21	suppressed
Bisoprolol Fumarate	Bisoprolol Fumarate	20	suppressed
Humulin R	Insulin Regular, Human	20	suppressed
Nifedipine Er	Nifedipine	20	suppressed
Nortriptyline Hcl	Nortriptyline Hcl	20	suppressed
Paxlovid	Nirmatrelvir/Ritonavir	20	19
Clobetasol Propionate	Clobetasol Propionate	19	suppressed
Ibandronate Sodium	Ibandronate Sodium	19	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	19	suppressed
Xarelto	Rivaroxaban	19	suppressed
Donepezil Hcl	Donepezil Hcl	18	suppressed
Ropinirole Hcl	Ropinirole Hcl	18	suppressed
Cartia Xt	Diltiazem Hcl	17	13
Clindamycin Hcl	Clindamycin Hcl	17	suppressed
Eliquis	Apixaban	17	suppressed
Eszopiclone	Eszopiclone	17	suppressed
Ezetimibe	Ezetimibe	17	suppressed
Humulin N Kwikpen	Insulin Nph Human Isophane	17	suppressed
Acetaminophen-Codeine	Acetaminophen With Codeine	16	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	16	suppressed
Duloxetine Hcl	Duloxetine Hcl	16	suppressed
Midodrine Hcl	Midodrine Hcl	16	suppressed
Nitroglycerin	Nitroglycerin	16	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	16	suppressed
Latanoprost	Latanoprost	15	suppressed
Lidocaine	Lidocaine	15	suppressed
Mupirocin	Mupirocin	15	suppressed
Oxybutynin Chloride Er	Oxybutynin Chloride	15	suppressed
Sulfamethoxazole-Trimethoprim	Sulfamethoxazole/Trimethoprim	15	14
Tradjenta	Linagliptin	15	suppressed
Bupropion Xl	Bupropion Hcl	14	suppressed
Colchicine	Colchicine	14	suppressed
Retin-A	Tretinoin	14	suppressed
Sumatriptan	Sumatriptan	14	suppressed
Baclofen	Baclofen	13	suppressed
Diphenoxylate-Atropine	Diphenoxylate Hcl/Atropine	13	suppressed
Doxycycline Monohydrate	Doxycycline Monohydrate	13	suppressed
Neomycin-Polymyxin-Dexameth	Neomycin/Polymyxin B/Dexametha	13	suppressed
Advair Hfa	Fluticasone Propion/Salmeterol	12	suppressed
Atomoxetine Hcl	Atomoxetine Hcl	12	suppressed
Bumetanide	Bumetanide	12	suppressed
Combivent Respimat	Ipratropium/Albuterol Sulfate	12	suppressed
Naratriptan Hcl	Naratriptan Hcl	12	suppressed
Ranolazine Er	Ranolazine	12	suppressed
Breyna	Budesonide/Formoterol Fumarate	11	suppressed
Cephalexin	Cephalexin	11	suppressed
Clonidine Hcl	Clonidine Hcl	11	suppressed
Humulin 70/30 Kwikpen	Insulin Nph Hum/Reg Insulin Hm	11	suppressed
Pioglitazone Hcl	Pioglitazone Hcl	11	suppressed
Rizatriptan	Rizatriptan Benzoate	11	suppressed
Testosterone	Testosterone	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