Healthcare provider profile · identity verified

Timothy Patrick Ong, MD

Internal Medicine · SAN JOSE, CA · NPI 1033125075

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

BrandGenericClaimsBeneficiaries
Atorvastatin CalciumAtorvastatin Calcium654179
Amlodipine BesylateAmlodipine Besylate564160
Metformin HclMetformin Hcl428123
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen36959
OmeprazoleOmeprazole32597
Losartan PotassiumLosartan Potassium27487
GabapentinGabapentin27082
SimvastatinSimvastatin24163
HydrochlorothiazideHydrochlorothiazide22967
LisinoprilLisinopril22963
AtenololAtenolol19753
Tamsulosin HclTamsulosin Hcl19456
Trazodone HclTrazodone Hcl18048
Fluticasone PropionateFluticasone Propionate17167
JardianceEmpagliflozin16342
Albuterol Sulfate HfaAlbuterol Sulfate16253
Metoprolol SuccinateMetoprolol Succinate16245
BaclofenBaclofen15753
Levothyroxine SodiumLevothyroxine Sodium15247
GlipizideGlipizide14735
FurosemideFurosemide14645
OzempicSemaglutide12325
Pravastatin SodiumPravastatin Sodium11424
Metoprolol TartrateMetoprolol Tartrate10827
Triamcinolone AcetonideTriamcinolone Acetonide10546
Fosinopril SodiumFosinopril Sodium10130
Pantoprazole SodiumPantoprazole Sodium10135
ClotrimazoleClotrimazole9641
HydrocortisoneHydrocortisone9241
Benazepril HclBenazepril Hcl8520
Diclofenac SodiumDiclofenac Sodium8341
TrulicityDulaglutide7714
ClopidogrelClopidogrel Bisulfate7620
Hydroxyzine HclHydroxyzine Hcl7425
CarvedilolCarvedilol7217
FamotidineFamotidine6624
Duloxetine HclDuloxetine Hcl6120
Hydralazine HclHydralazine Hcl6120
Tramadol HclTramadol Hcl6111
FinasterideFinasteride5918
EliquisApixaban5516
Oxybutynin Chloride ErOxybutynin Chloride5511
XareltoRivaroxaban5515
Arnuity ElliptaFluticasone Furoate5312
Chlorhexidine GluconateChlorhexidine Gluconate5212
Metformin Hcl ErMetformin Hcl5216
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen51suppressed
IbuprofenIbuprofen4918
Citalopram HbrCitalopram Hydrobromide4812
Escitalopram OxalateEscitalopram Oxalate4717
Atrovent HfaIpratropium Bromide46suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl4612
Acetaminophen-CodeineAcetaminophen With Codeine44suppressed
KetoconazoleKetoconazole4420
PregabalinPregabalin4414
Propranolol HclPropranolol Hcl4414
LevetiracetamLevetiracetam43suppressed
Alendronate SodiumAlendronate Sodium4212
Ventolin HfaAlbuterol Sulfate4212
Donepezil HclDonepezil Hcl41suppressed
LactuloseLactulose3911
Lantus SolostarInsulin Glargine,hum.Rec.Anlog38suppressed
Rosuvastatin CalciumRosuvastatin Calcium3614
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog35suppressed
Oxycodone HclOxycodone Hcl35suppressed
JanuviaSitagliptin Phosphate34suppressed
Semglee (Yfgn) PenInsulin Glargine-Yfgn33suppressed
RybelsusSemaglutide32suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic3211
DiazepamDiazepam31suppressed
AllopurinolAllopurinol30suppressed
Fluoxetine HclFluoxetine Hcl30suppressed
LorazepamLorazepam30suppressed
Spiriva HandihalerTiotropium Bromide30suppressed
Pioglitazone HclPioglitazone Hcl29suppressed
AlprazolamAlprazolam28suppressed
NitroglycerinNitroglycerin2817
Ondansetron HclOndansetron Hcl28suppressed
Sumatriptan SuccinateSumatriptan Succinate28suppressed
Glipizide ErGlipizide27suppressed
Quetiapine FumarateQuetiapine Fumarate27suppressed
Venlafaxine Hcl ErVenlafaxine Hcl27suppressed
FluocinonideFluocinonide26suppressed
Incruse ElliptaUmeclidinium Bromide26suppressed
Amitriptyline HclAmitriptyline Hcl25suppressed
Buspirone HclBuspirone Hcl25suppressed
ClonazepamClonazepam25suppressed
MirtazapineMirtazapine24suppressed
NaproxenNaproxen24suppressed
Paroxetine HclParoxetine Hcl24suppressed
Potassium ChloridePotassium Chloride24suppressed
ColchicineColchicine2313
TradjentaLinagliptin23suppressed
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic23suppressed
LatanoprostLatanoprost21suppressed
Methadone HclMethadone Hcl21suppressed
Sertraline HclSertraline Hcl21suppressed
SpironolactoneSpironolactone21suppressed
Breo ElliptaFluticasone/Vilanterol20suppressed
BreynaBudesonide/Formoterol Fumarate20suppressed
Buprenorphine-NaloxoneBuprenorphine Hcl/Naloxone Hcl20suppressed
Dicyclomine HclDicyclomine Hcl20suppressed
Doxazosin MesylateDoxazosin Mesylate20suppressed
GemfibrozilGemfibrozil20suppressed
DigoxinDigoxin19suppressed
Montelukast SodiumMontelukast Sodium19suppressed
Nifedipine ErNifedipine19suppressed
NystatinNystatin19suppressed
MupirocinMupirocin18suppressed
Nortriptyline HclNortriptyline Hcl18suppressed
AcyclovirAcyclovir17suppressed
Azelastine HclAzelastine Hcl17suppressed
Phenytoin Sodium ExtendedPhenytoin Sodium Extended17suppressed
Betamethasone Diprop AugmentedBetamethasone/Propylene Glyc16suppressed
Metoclopramide HclMetoclopramide Hcl16suppressed
ValacyclovirValacyclovir Hcl16suppressed
Advair HfaFluticasone Propion/Salmeterol15suppressed
Clindamycin PhosphateClindamycin Phosphate15suppressed
Doxepin HclDoxepin Hcl15suppressed
Meclizine HclMeclizine Hcl15suppressed
MyrbetriqMirabegron15suppressed
Novolog FlexpenInsulin Aspart15suppressed
CephalexinCephalexin14suppressed
Humulin NInsulin Nph Human Isophane14suppressed
Insulin SyringeSyring-Needl,disp,insul,0.3 Ml14suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate14suppressed
LoperamideLoperamide Hcl14suppressed
RisperidoneRisperidone14suppressed
CarisoprodolCarisoprodol13suppressed
Estradiol (Once Weekly)Estradiol13suppressed
Fiasp FlextouchInsulin Aspart (Niacinamide)13suppressed
Fluticasone Propionate HfaFluticasone Propionate13suppressed
GlimepirideGlimepiride13suppressed
Novolog Mix 70-30 FlexpenInsulin Aspart Prot/Insuln Asp13suppressed
PhenobarbitalPhenobarbital13suppressed
Promethazine HclPromethazine Hcl13suppressed
Wixela InhubFluticasone Propion/Salmeterol13suppressed
Amiodarone HclAmiodarone Hcl12suppressed
Butalbital-Acetaminophen-CaffeButalb/Acetaminophen/Caffeine12suppressed
Chlorpromazine HclChlorpromazine Hcl12suppressed
Insulin Aspart Prot Mix 70-30Insulin Aspart Prot/Insuln Asp12suppressed
Insulin SyringeSyringe-Needle,insulin,0.5 Ml12suppressed
Methenamine HippurateMethenamine Hippurate12suppressed
MounjaroTirzepatide12suppressed
OxycontinOxycodone Hcl12suppressed
BrilintaTicagrelor11suppressed
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate11suppressed
LinzessLinaclotide11suppressed
MeloxicamMeloxicam11suppressed
PaxlovidNirmatrelvir/Ritonavir1111
SynthroidLevothyroxine Sodium11suppressed

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.

YearGeneral PaymentsMain payerExplicit productsCompany overlapsPart D coverage
2025
2024 Complete

Questions to ask

Questions you could discuss with your doctor

These are general questions generated from reviewed templates. They are not personalized medical advice.

Sources and limitations

How to read this page

Loaded source releases

DatasetYearPublicationSource
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