Healthcare provider profile · identity verified

John C Chow, M.D.

Internal Medicine · SAN MATEO, CA · NPI 1215984513

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	1121	308
Amlodipine Besylate	Amlodipine Besylate	978	263
Losartan Potassium	Losartan Potassium	682	187
Levothyroxine Sodium	Levothyroxine Sodium	550	140
Metformin Hcl	Metformin Hcl	324	89
Simvastatin	Simvastatin	324	87
Metoprolol Succinate	Metoprolol Succinate	302	79
Tamsulosin Hcl	Tamsulosin Hcl	290	82
Atenolol	Atenolol	216	59
Zolpidem Tartrate	Zolpidem Tartrate	215	49
Rosuvastatin Calcium	Rosuvastatin Calcium	199	66
Gabapentin	Gabapentin	187	71
Hydrochlorothiazide	Hydrochlorothiazide	177	50
Allopurinol	Allopurinol	174	53
Finasteride	Finasteride	170	50
Pantoprazole Sodium	Pantoprazole Sodium	162	56
Lisinopril	Lisinopril	152	43
Omeprazole	Omeprazole	152	45
Lorazepam	Lorazepam	137	33
Eliquis	Apixaban	134	29
Losartan-Hydrochlorothiazide	Losartan/Hydrochlorothiazide	132	37
Glimepiride	Glimepiride	116	34
Azithromycin	Azithromycin	108	95
Celecoxib	Celecoxib	107	55
Cephalexin	Cephalexin	102	82
Sertraline Hcl	Sertraline Hcl	100	30
Trazodone Hcl	Trazodone Hcl	100	31
Hydrocodone-Acetaminophen	Hydrocodone/Acetaminophen	96	38
Metoprolol Tartrate	Metoprolol Tartrate	96	24
Furosemide	Furosemide	95	33
Albuterol Sulfate Hfa	Albuterol Sulfate	92	31
Alendronate Sodium	Alendronate Sodium	89	26
Azelastine Hcl	Azelastine Hcl	79	31
Spironolactone	Spironolactone	79	22
Hydralazine Hcl	Hydralazine Hcl	77	26
Valsartan	Valsartan	75	28
Donepezil Hcl	Donepezil Hcl	73	18
Famotidine	Famotidine	73	27
Ezetimibe	Ezetimibe	71	23
Torsemide	Torsemide	71	25
Paxlovid	Nirmatrelvir/Ritonavir	69	64
Clobetasol Propionate	Clobetasol Propionate	66	31
Prednisone	Prednisone	66	50
Pioglitazone Hcl	Pioglitazone Hcl	65	23
Alprazolam	Alprazolam	63	20
Clopidogrel	Clopidogrel Bisulfate	63	23
Escitalopram Oxalate	Escitalopram Oxalate	63	23
Fluticasone Propionate	Fluticasone Propionate	59	28
Glipizide	Glipizide	54	14
Potassium Chloride	Potassium Chloride	51	17
Synthroid	Levothyroxine Sodium	51	14
Glipizide Er	Glipizide	49	16
Betamethasone Diprop Augmented	Betamethasone/Propylene Glyc	48	23
Carvedilol	Carvedilol	46	12
Fenofibrate	Fenofibrate	46	12
Farxiga	Dapagliflozin Propanediol	45	14
Ciprofloxacin Hcl	Ciprofloxacin Hcl	44	35
Lovastatin	Lovastatin	43	14
Montelukast Sodium	Montelukast Sodium	42	14
Bisoprolol Fumarate	Bisoprolol Fumarate	41	15
Clonazepam	Clonazepam	41	suppressed
Pravastatin Sodium	Pravastatin Sodium	41	12
Mirtazapine	Mirtazapine	40	14
Triamcinolone Acetonide	Triamcinolone Acetonide	40	16
Xarelto	Rivaroxaban	40	suppressed
Meloxicam	Meloxicam	39	suppressed
Tramadol Hcl	Tramadol Hcl	38	14
Clonidine Hcl	Clonidine Hcl	35	suppressed
Fluoxetine Hcl	Fluoxetine Hcl	34	suppressed
Ketoconazole	Ketoconazole	34	15
Nifedipine Er	Nifedipine	34	suppressed
Temazepam	Temazepam	34	suppressed
Triamterene-Hydrochlorothiazid	Triamterene/Hydrochlorothiazid	34	11
Januvia	Sitagliptin Phosphate	33	suppressed
Methimazole	Methimazole	32	suppressed
Levofloxacin	Levofloxacin	31	29
Olmesartan Medoxomil	Olmesartan Medoxomil	31	11
Metformin Hcl Er	Metformin Hcl	30	11
Colchicine	Colchicine	29	13
Valsartan-Hydrochlorothiazide	Valsartan/Hydrochlorothiazide	29	suppressed
Verapamil Er	Verapamil Hcl	29	suppressed
Hydrocortisone	Hydrocortisone	28	17
Valacyclovir	Valacyclovir Hcl	28	16
Diclofenac Sodium	Diclofenac Sodium	27	suppressed
Duloxetine Hcl	Duloxetine Hcl	27	suppressed
Fenofibrate	Fenofibrate,micronized	26	suppressed
Paroxetine Hcl	Paroxetine Hcl	24	suppressed
Trelegy Ellipta	Fluticasone/Umeclidin/Vilanter	24	suppressed
Amoxicillin-Clavulanate Potass	Amoxicillin/Potassium Clav	22	21
Lisinopril-Hydrochlorothiazide	Lisinopril/Hydrochlorothiazide	22	suppressed
Valium	Diazepam	22	suppressed
Doxazosin Mesylate	Doxazosin Mesylate	21	suppressed
Symbicort	Budesonide/Formoterol Fumarate	21	suppressed
Clotrimazole-Betamethasone	Clotrimazole/Betamethasone Dip	20	13
Fenofibrate	Fenofibrate Nanocrystallized	20	suppressed
Nystatin	Nystatin	20	suppressed
Risperidone	Risperidone	20	suppressed
Estradiol	Estradiol	19	suppressed
Acyclovir	Acyclovir	18	suppressed
Butalbital-Acetaminophen-Caffe	Butalb/Acetaminophen/Caffeine	18	suppressed
Calcitonin-Salmon	Calcitonin,salmon,synthetic	18	suppressed
Cyclobenzaprine Hcl	Cyclobenzaprine Hcl	18	suppressed
Folic Acid	Folic Acid	18	suppressed
Jardiance	Empagliflozin	18	suppressed
Sumatriptan Succinate	Sumatriptan Succinate	18	suppressed
Diazepam	Diazepam	17	12
Irbesartan	Irbesartan	17	suppressed
Venlafaxine Hcl Er	Venlafaxine Hcl	17	suppressed
Baclofen	Baclofen	16	suppressed
Nitrofurantoin Mono-Macro	Nitrofurantoin Monohyd/M-Cryst	16	12
Nortriptyline Hcl	Nortriptyline Hcl	16	suppressed
Citalopram Hbr	Citalopram Hydrobromide	15	suppressed
Neomycin-Polymyxin-Dexameth	Neomycin/Polymyxin B/Dexametha	15	13
Bupropion Xl	Bupropion Hcl	14	suppressed
Entecavir	Entecavir	14	suppressed
Ezetimibe-Simvastatin	Ezetimibe/Simvastatin	14	suppressed
Quetiapine Fumarate	Quetiapine Fumarate	14	suppressed
Hydroxyzine Hcl	Hydroxyzine Hcl	13	suppressed
Ibuprofen	Ibuprofen	13	suppressed
Lactulose	Lactulose	13	suppressed
Megestrol Acetate	Megestrol Acetate	13	suppressed
Nitrofurantoin	Nitrofurantoin Macrocrystal	13	suppressed
Propranolol Hcl	Propranolol Hcl	13	suppressed
Ramipril	Ramipril	13	suppressed
Warfarin Sodium	Warfarin Sodium	13	suppressed
Aripiprazole	Aripiprazole	12	suppressed
Chlorthalidone	Chlorthalidone	12	suppressed
Memantine Hcl	Memantine Hcl	12	suppressed
Omega-3 Acid Ethyl Esters	Omega-3 Acid Ethyl Esters	12	suppressed
Oxycodone-Acetaminophen	Oxycodone Hcl/Acetaminophen	12	suppressed
Propranolol Hcl Er	Propranolol Hcl	12	suppressed
Rabeprazole Sodium	Rabeprazole Sodium	12	suppressed
Ropinirole Hcl	Ropinirole Hcl	12	suppressed
Theophylline Er	Theophylline Anhydrous	12	suppressed
Triazolam	Triazolam	12	suppressed
Amitriptyline Hcl	Amitriptyline Hcl	11	suppressed
Basaglar Kwikpen U-100	Insulin Glargine,hum.Rec.Anlog	11	suppressed
Bupropion Hcl Sr	Bupropion Hcl	11	suppressed
Ciclopirox	Ciclopirox Olamine	11	suppressed
Spiriva Respimat	Tiotropium Bromide	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