Healthcare provider profile · identity verified

Anthony S Leazzo, DO

Family Practice · OAKBROOK TERRACE, IL · NPI 1912056995

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 Calcium462156
Levothyroxine SodiumLevothyroxine Sodium344109
LisinoprilLisinopril19668
Metoprolol SuccinateMetoprolol Succinate15055
Amlodipine BesylateAmlodipine Besylate14347
Losartan PotassiumLosartan Potassium14054
SimvastatinSimvastatin13244
Tamsulosin HclTamsulosin Hcl12037
OmeprazoleOmeprazole11243
Pantoprazole SodiumPantoprazole Sodium11036
HydrochlorothiazideHydrochlorothiazide10637
Metformin HclMetformin Hcl10336
Zolpidem TartrateZolpidem Tartrate10216
PrednisonePrednisone9984
AllopurinolAllopurinol7028
Sertraline HclSertraline Hcl6719
Escitalopram OxalateEscitalopram Oxalate6625
JardianceEmpagliflozin6522
Rosuvastatin CalciumRosuvastatin Calcium6120
GabapentinGabapentin5420
Metformin Hcl ErMetformin Hcl5117
Tramadol HclTramadol Hcl5012
Duloxetine HclDuloxetine Hcl4915
OzempicSemaglutide48suppressed
Metoprolol TartrateMetoprolol Tartrate4614
AtenololAtenolol4511
Pravastatin SodiumPravastatin Sodium4517
AlprazolamAlprazolam4413
SynthroidLevothyroxine Sodium4313
Raloxifene HclRaloxifene Hcl4111
Oxybutynin Chloride ErOxybutynin Chloride40suppressed
EzetimibeEzetimibe3715
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide3612
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst3631
Pioglitazone HclPioglitazone Hcl35suppressed
FinasterideFinasteride33suppressed
Alendronate SodiumAlendronate Sodium3111
Montelukast SodiumMontelukast Sodium3112
Trazodone HclTrazodone Hcl31suppressed
Venlafaxine Hcl ErVenlafaxine Hcl3111
Diclofenac SodiumDiclofenac Sodium29suppressed
Hydralazine HclHydralazine Hcl29suppressed
FenofibrateFenofibrate Nanocrystallized28suppressed
XareltoRivaroxaban28suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide27suppressed
Citalopram HbrCitalopram Hydrobromide2611
EliquisApixaban26suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium26suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen26suppressed
Ropinirole HclRopinirole Hcl26suppressed
ClopidogrelClopidogrel Bisulfate25suppressed
JanuviaSitagliptin Phosphate25suppressed
Fluticasone PropionateFluticasone Propionate2311
TemazepamTemazepam23suppressed
Tizanidine HclTizanidine Hcl23suppressed
CarvedilolCarvedilol22suppressed
CelecoxibCelecoxib22suppressed
ClonazepamClonazepam22suppressed
LovastatinLovastatin22suppressed
Albuterol Sulfate HfaAlbuterol Sulfate2116
EstradiolEstradiol20suppressed
Azelastine HclAzelastine Hcl19suppressed
Amitriptyline HclAmitriptyline Hcl18suppressed
Enalapril MaleateEnalapril Maleate18suppressed
FurosemideFurosemide18suppressed
GlimepirideGlimepiride18suppressed
IrbesartanIrbesartan18suppressed
Liothyronine SodiumLiothyronine Sodium18suppressed
Paroxetine HclParoxetine Hcl18suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid18suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1716
Doxycycline HyclateDoxycycline Hyclate1717
Lantus SolostarInsulin Glargine,hum.Rec.Anlog17suppressed
LorazepamLorazepam17suppressed
Olmesartan MedoxomilOlmesartan Medoxomil17suppressed
SpironolactoneSpironolactone16suppressed
Breo ElliptaFluticasone/Vilanterol15suppressed
Warfarin SodiumWarfarin Sodium15suppressed
Bupropion XlBupropion Hcl14suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol14suppressed
Triamcinolone AcetonideTriamcinolone Acetonide14suppressed
Ciprofloxacin HclCiprofloxacin Hcl1313
Cyclobenzaprine HclCyclobenzaprine Hcl13suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate13suppressed
Irbesartan-HydrochlorothiazideIrbesartan/Hydrochlorothiazide13suppressed
Potassium ChloridePotassium Chloride13suppressed
Propranolol Hcl ErPropranolol Hcl13suppressed
EszopicloneEszopiclone12suppressed
Fluoxetine HclFluoxetine Hcl12suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide12suppressed
BumetanideBumetanide11suppressed
Clobetasol PropionateClobetasol Propionate11suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl11suppressed
Hydroxyzine HclHydroxyzine Hcl11suppressed
PregabalinPregabalin11suppressed

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