Healthcare provider profile · identity verified

Nancy J Councelbaum, MD

Internal Medicine · IRVINE, CA · NPI 1275635013

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
Levothyroxine SodiumLevothyroxine Sodium452122
Atorvastatin CalciumAtorvastatin Calcium332107
Losartan PotassiumLosartan Potassium32098
Rosuvastatin CalciumRosuvastatin Calcium30291
Amlodipine BesylateAmlodipine Besylate26676
Escitalopram OxalateEscitalopram Oxalate16147
LisinoprilLisinopril14944
GabapentinGabapentin13543
SynthroidLevothyroxine Sodium10430
OmeprazoleOmeprazole10133
Metformin HclMetformin Hcl10034
Olmesartan MedoxomilOlmesartan Medoxomil9827
HydrochlorothiazideHydrochlorothiazide8834
Trazodone HclTrazodone Hcl7525
Pantoprazole SodiumPantoprazole Sodium7224
Metoprolol SuccinateMetoprolol Succinate7122
FamotidineFamotidine6722
Alendronate SodiumAlendronate Sodium6320
ValsartanValsartan6119
Albuterol Sulfate HfaAlbuterol Sulfate5835
SimvastatinSimvastatin5817
Zolpidem TartrateZolpidem Tartrate5719
Sertraline HclSertraline Hcl4916
Duloxetine HclDuloxetine Hcl4415
Montelukast SodiumMontelukast Sodium4112
Fluoxetine HclFluoxetine Hcl3612
Bupropion XlBupropion Hcl35suppressed
AlprazolamAlprazolam3420
Fluticasone PropionateFluticasone Propionate3315
Pravastatin SodiumPravastatin Sodium33suppressed
Venlafaxine Hcl ErVenlafaxine Hcl33suppressed
FurosemideFurosemide3214
ValacyclovirValacyclovir Hcl3220
AtenololAtenolol31suppressed
Citalopram HbrCitalopram Hydrobromide31suppressed
EstradiolEstradiol30suppressed
EzetimibeEzetimibe2911
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide28suppressed
Tamsulosin HclTamsulosin Hcl2812
Memantine HclMemantine Hcl26suppressed
MeloxicamMeloxicam25suppressed
Metoprolol TartrateMetoprolol Tartrate2411
MyrbetriqMirabegron23suppressed
OzempicSemaglutide21suppressed
ClopidogrelClopidogrel Bisulfate19suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium19suppressed
LovastatinLovastatin18suppressed
Potassium ChloridePotassium Chloride18suppressed
Propranolol HclPropranolol Hcl1811
Diltiazem 24hr ErDiltiazem Hcl16suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl16suppressed
Enalapril MaleateEnalapril Maleate16suppressed
JanuviaSitagliptin Phosphate16suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide16suppressed
AllopurinolAllopurinol15suppressed
Sumatriptan SuccinateSumatriptan Succinate15suppressed
XareltoRivaroxaban15suppressed
CarvedilolCarvedilol14suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide14suppressed
ClonazepamClonazepam13suppressed
EliquisApixaban13suppressed
Estradiol (Twice Weekly)Estradiol13suppressed
Metformin Hcl ErMetformin Hcl13suppressed
MounjaroTirzepatide13suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid13suppressed
Warfarin SodiumWarfarin Sodium13suppressed
CelecoxibCelecoxib12suppressed
Clonidine HclClonidine Hcl12suppressed
AzithromycinAzithromycin1111
Donepezil HclDonepezil Hcl11suppressed
JardianceEmpagliflozin11suppressed
Liothyronine SodiumLiothyronine Sodium11suppressed
SpironolactoneSpironolactone11suppressed

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