Healthcare provider profile · identity verified

Thiri T Oo, M.D.

Internal Medicine · CLAREMONT, CA · NPI 1619256617

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 Calcium488166
Amlodipine BesylateAmlodipine Besylate27599
Losartan PotassiumLosartan Potassium27192
LisinoprilLisinopril26488
Levothyroxine SodiumLevothyroxine Sodium25483
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen18345
AtenololAtenolol15449
OmeprazoleOmeprazole14657
SimvastatinSimvastatin14446
GabapentinGabapentin13143
Metformin HclMetformin Hcl13044
Rosuvastatin CalciumRosuvastatin Calcium13047
HydrochlorothiazideHydrochlorothiazide12946
Alendronate SodiumAlendronate Sodium12639
GlipizideGlipizide12643
Metformin Hcl ErMetformin Hcl11443
Potassium ChloridePotassium Chloride11041
Trazodone HclTrazodone Hcl10838
Pantoprazole SodiumPantoprazole Sodium10634
Metoprolol TartrateMetoprolol Tartrate10236
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide8829
Albuterol Sulfate HfaAlbuterol Sulfate8457
FurosemideFurosemide8436
Terazosin HclTerazosin Hcl8228
IbuprofenIbuprofen7745
PrednisonePrednisone7662
Azelastine HclAzelastine Hcl7528
PradaxaDabigatran Etexilate Mesylate7422
Tramadol HclTramadol Hcl6724
MeloxicamMeloxicam6528
Triamcinolone AcetonideTriamcinolone Acetonide6342
Sertraline HclSertraline Hcl6220
Bisoprolol FumarateBisoprolol Fumarate5723
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide5620
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen5411
ClopidogrelClopidogrel Bisulfate5317
FamotidineFamotidine4819
Tamsulosin HclTamsulosin Hcl4618
EzetimibeEzetimibe4516
Citalopram HbrCitalopram Hydrobromide4414
Hydralazine HclHydralazine Hcl4216
Fluoxetine HclFluoxetine Hcl4114
Fluticasone PropionateFluticasone Propionate4114
Montelukast SodiumMontelukast Sodium4016
FinasterideFinasteride3717
CephalexinCephalexin3630
Wixela InhubFluticasone Propion/Salmeterol3415
ArexvyRsvpref3 Antigen/As01e/Pf3333
TopiramateTopiramate32suppressed
AllopurinolAllopurinol31suppressed
JardianceEmpagliflozin3112
LovastatinLovastatin31suppressed
EstradiolEstradiol3014
FenofibrateFenofibrate30suppressed
LorazepamLorazepam29suppressed
Spiriva RespimatTiotropium Bromide29suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl28suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic2811
SpironolactoneSpironolactone28suppressed
Doxycycline MonohydrateDoxycycline Monohydrate2723
AlvescoCiclesonide2616
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav2624
EliquisApixaban26suppressed
MirtazapineMirtazapine2614
Dicyclomine HclDicyclomine Hcl25suppressed
HydrocortisoneHydrocortisone2512
OzempicSemaglutide25suppressed
Acetaminophen-CodeineAcetaminophen With Codeine24suppressed
Duloxetine HclDuloxetine Hcl24suppressed
Humulin NInsulin Nph Human Isophane24suppressed
PregabalinPregabalin24suppressed
Ropinirole HclRopinirole Hcl23suppressed
Venlafaxine Hcl ErVenlafaxine Hcl23suppressed
FentanylFentanyl21suppressed
LactuloseLactulose21suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst2116
AzithromycinAzithromycin2018
ChlorthalidoneChlorthalidone20suppressed
KetoconazoleKetoconazole2012
Oxybutynin Chloride ErOxybutynin Chloride20suppressed
Adacel TdapDiph,pertuss(Acell),tet Vac/Pf1919
Pioglitazone HclPioglitazone Hcl18suppressed
ShingrixVaricella-Zoster Ge/As01b/Pf1818
NystatinNystatin17suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid17suppressed
ValacyclovirValacyclovir Hcl17suppressed
Humulin 70/30 KwikpenInsulin Nph Hum/Reg Insulin Hm16suppressed
Humulin RInsulin Regular, Human16suppressed
Pravastatin SodiumPravastatin Sodium16suppressed
TemazepamTemazepam16suppressed
CiclopiroxCiclopirox15suppressed
MupirocinMupirocin15suppressed
Risedronate SodiumRisedronate Sodium15suppressed
Sumatriptan SuccinateSumatriptan Succinate15suppressed
BaclofenBaclofen14suppressed
Buspirone HclBuspirone Hcl14suppressed
Escitalopram OxalateEscitalopram Oxalate14suppressed
FluocinonideFluocinonide14suppressed
Trospium ChlorideTrospium Chloride14suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate13suppressed
LiraglutideLiraglutide13suppressed
Nortriptyline HclNortriptyline Hcl13suppressed
AcyclovirAcyclovir12suppressed
AmoxicillinAmoxicillin12suppressed
Bupropion Hcl SrBupropion Hcl12suppressed
MetronidazoleMetronidazole12suppressed
NaproxenNaproxen12suppressed
Ondansetron OdtOndansetron12suppressed
AlprazolamAlprazolam11suppressed
Betamethasone Diprop AugmentedBetamethasone/Propylene Glyc11suppressed
CefadroxilCefadroxil11suppressed
Neomycin-Polymyxin-DexamethNeomycin/Polymyxin B/Dexametha11suppressed
Victoza 2-PakLiraglutide11suppressed
Warfarin SodiumWarfarin 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