Healthcare provider profile · identity verified

Gregory D Kaczmarek, MD

Allopathic & Osteopathic Physicians|General Practice · SKOKIE, IL · NPI 1629032958

Profile state: payments and partd 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

CMS Open Payments records show Gregory D Kaczmarek, MD received $2,540.87 in general payments during 2025 across 127 reported records.

PFIZER INC. accounted for 19.7% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 38 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis, Farxiga, Ozempic, Paxlovid.

ABBVIE INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SYNTHROID as an associated drug or biological on 10655 records involving 4881 distinct recipient NPIs. Public Medicare Part D data also shows 59 claims for Synthroid by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported BRILINTA as an associated drug or biological on 993 records involving 512 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Brilinta by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 50 claims for Farxiga by this doctor in 2024.

GlaxoSmithKline, LLC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported TRELEGY ELLIPTA as an associated drug or biological on 131532 records involving 37148 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Trelegy Ellipta by this doctor in 2024.

Novo Nordisk Inc reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 43 claims for Ozempic by this doctor in 2024.

PFIZER INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 98 claims for Eliquis by this doctor in 2024.

PFIZER INC. reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported PAXLOVID as an associated drug or biological on 24465 records involving 15715 distinct recipient NPIs. Public Medicare Part D data also shows 31 claims for Paxlovid by this doctor in 2024.

These records do not establish that a payment influenced prescribing or medical care.

Payment overview · 2025

General Payments

$2,540.87

127 reported records · 21 companies

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.

Who paid this doctor?

Companies in 2025 General Payments

Reported companyCanonical companyAmountShareRecordsYear
PFIZER INC. Unresolved — no canonical attribution shown $501.4719.7%252025
Novo Nordisk Inc Unresolved — no canonical attribution shown $419.9216.5%212025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $299.3611.8%172025
Amgen Inc. Unresolved — no canonical attribution shown $222.938.8%112025
ABBVIE INC. Unresolved — no canonical attribution shown $212.028.3%142025
Lilly USA, LLC Unresolved — no canonical attribution shown $174.406.9%62025
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $109.004.3%62025
Janssen Pharmaceuticals, Inc Unresolved — no canonical attribution shown $106.444.2%52025
Salix Pharmaceuticals, a division of Bausch Health US, LLC Unresolved — no canonical attribution shown $86.013.4%52025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $79.383.1%32025
Sumitomo Pharma America, Inc. Unresolved — no canonical attribution shown $56.702.2%22025
Seqirus USA Inc Unresolved — no canonical attribution shown $38.581.5%22025
Exact Sciences Corporation Unresolved — no canonical attribution shown $37.131.5%22025
Inspire Medical Systems, Inc. Unresolved — no canonical attribution shown $34.171.3%12025
Gilead Sciences, Inc. Unresolved — no canonical attribution shown $32.961.3%12025
Corcept Therapeutics Unresolved — no canonical attribution shown $31.131.2%12025
Spinal Simplicity, LLC Unresolved — no canonical attribution shown $21.800.9%12025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $20.910.8%12025
Esperion Therapeutics, Inc. Unresolved — no canonical attribution shown $19.960.8%12025
SANOFI PASTEUR INC. Unresolved — no canonical attribution shown $19.900.8%12025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $16.700.7%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$2,540.87127

A meal, consulting fee, royalty, and travel payment describe different kinds of reported relationships and should not be interpreted as equivalent.

Analysis 1 · Payment-linked products

Products named in Open Payments records

Reported productTypeReported companyRelated amount*RecordsYear
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $262.38 12 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $247.03 13 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $222.93 11 2025
Source payment records
ABRYSVO
Normalized: abrysvo
Biological PFIZER INC. $205.32 9 2025
Source payment records
COMIRNATY
Normalized: comirnaty
Biological PFIZER INC. $205.32 9 2025
Source payment records
PREVNAR 20
Normalized: prevnar 20
Biological PFIZER INC. $205.32 9 2025
Source payment records
OTEZLA
Normalized: otezla
Drug Amgen Inc. $203.38 10 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $146.41 5 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $139.55 10 2025
Source payment records
ELIQUIS
Normalized: eliquis
Drug PFIZER INC. $135.92 9 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $134.02 8 2025
Source payment records
CAPVAXIVE
Normalized: capvaxive
Biological Merck Sharp & Dohme LLC $109.00 6 2025
Source payment records
GARDASIL 9
Normalized: gardasil 9
Biological Merck Sharp & Dohme LLC $109.00 6 2025
Source payment records
FARXIGA
Normalized: farxiga
Drug AstraZeneca Pharmaceuticals LP $107.65 6 2025
Source payment records
SPRAVATO
Normalized: spravato
Drug Janssen Pharmaceuticals, Inc $106.44 5 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $97.37 5 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $97.37 5 2025
Source payment records
XIFAXAN
Normalized: xifaxan
Drug Salix Pharmaceuticals, a division of Bausch Health US, LLC $86.01 5 2025
Source payment records
  • 2025-03-17 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $16.32 · Open Payments source
  • 2025-04-08 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $16.28 · Open Payments source
  • 2025-06-23 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $16.76 · Open Payments source
  • 2025-08-12 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $17.73 · Open Payments source
  • 2025-12-17 · Salix Pharmaceuticals, a division of Bausch Health US, LLC · $18.92 · Open Payments source
ZAVZPRET
Normalized: zavzpret
Drug PFIZER INC. $81.99 3 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $74.43 4 2025
Source payment records
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $72.47 4 2025
Source payment records
GEMTESA
Normalized: gemtesa
Drug Sumitomo Pharma America, Inc. $56.70 2 2025
Source payment records
Auvelity
Normalized: auvelity
Drug Axsome Therapeutics, Inc. $52.15 2 2025
Source payment records
QULIPTA
Normalized: qulipta
Drug ABBVIE INC. $44.22 3 2025
Source payment records
Fluad
Normalized: fluad
Biological Seqirus USA Inc $38.58 2 2025
Source payment records
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $37.13 2 2025
Source payment records
INSPIRE
Normalized: inspire
Device Inspire Medical Systems, Inc. $34.17 1 2025
Source payment records
Korlym
Normalized: korlym
Drug Corcept Therapeutics $31.13 1 2025
Source payment records
PAXLOVID
Normalized: paxlovid
Drug PFIZER INC. $29.89 2 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $28.28 1 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Lilly USA, LLC $27.99 1 2025
Source payment records
Symbravo
Normalized: symbravo
Drug Axsome Therapeutics, Inc. $27.23 1 2025
Source payment records
HA MINUTEMAN G3-R
Normalized: ha minuteman g3 r
Device Spinal Simplicity, LLC $21.80 1 2025
Source payment records
Flucelvax
Normalized: flucelvax
Biological Seqirus USA Inc $21.28 1 2025
Source payment records
AREXVY
Normalized: arexvy
Biological GlaxoSmithKline, LLC. $20.91 1 2025
Source payment records
SHINGRIX
Normalized: shingrix
Biological GlaxoSmithKline, LLC. $20.91 1 2025
Source payment records
NEXLETOL
Normalized: nexletol
Drug Esperion Therapeutics, Inc. $19.96 1 2025
Source payment records
FLUBLOK QUADRIVALENT NORTHERN HEMISPHERE
Normalized: flublok quadrivalent northern hemisphere
Biological SANOFI PASTEUR INC. $19.90 1 2025
Source payment records

* Product-associated amounts are non-additive because one payment record may name more than one product.

These products were named on specific Open Payments records. A named product does not show that the payment influenced treatment or prescribing.

Public prescribing for products named in payments

Open Payments productPayment yearPart D brandPart D yearClaimsMatch methodSource
ELIQUIS
eliquis
2025 Eliquis 2024 98
Beneficiary count suppressed
exact normalized Medicare Part D
FARXIGA
farxiga
2025 Farxiga 2024 50
Beneficiary count suppressed
exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 43
Beneficiary count suppressed
exact normalized Medicare Part D
PAXLOVID
paxlovid
2025 Paxlovid 2024 31 exact normalized Medicare Part D

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.

Paying companyPayment yearDrug reported by same entityOpen Payments evidencePart DClaimsBeneficiaries
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 SYNTHROID
open payments reported associated product
CMS Open Payments — General Payments
10655 supporting records · 4881 recipient NPIs · example record 1201352636
Synthroid · 2024
Exact normalized brand match · 1 Part D row
59 14
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 BRILINTA
open payments reported associated product
CMS Open Payments — General Payments
993 supporting records · 512 recipient NPIs · example record 1206131430
Brilinta · 2024
Exact normalized brand match · 1 Part D row
11 suppressed by CMS
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 FARXIGA
open payments reported associated product
CMS Open Payments — General Payments
106133 supporting records · 42906 recipient NPIs · example record 1206131362
Farxiga · 2024
Exact normalized brand match · 1 Part D row
50 suppressed by CMS
GlaxoSmithKline, LLC.
Exact reporting entity; no affiliate inference
2025 TRELEGY ELLIPTA
open payments reported associated product
CMS Open Payments — General Payments
131532 supporting records · 37148 recipient NPIs · example record 1190332369
Trelegy Ellipta · 2024
Exact normalized brand match · 1 Part D row
15 suppressed by CMS
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Ozempic
open payments reported associated product
CMS Open Payments — General Payments
261625 supporting records · 77793 recipient NPIs · example record 1188130076
Ozempic · 2024
Exact normalized brand match · 1 Part D row
43 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
87112 supporting records · 36032 recipient NPIs · example record 1228794063
Eliquis · 2024
Exact normalized brand match · 1 Part D row
98 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 PAXLOVID
open payments reported associated product
CMS Open Payments — General Payments
24465 supporting records · 15715 recipient NPIs · example record 1228794432
Paxlovid · 2024
Exact normalized brand match · 1 Part D row
31 31

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 Calcium33196
Amlodipine BesylateAmlodipine Besylate19842
GabapentinGabapentin16532
Levothyroxine SodiumLevothyroxine Sodium15842
Rosuvastatin CalciumRosuvastatin Calcium15248
Montelukast SodiumMontelukast Sodium12735
Metoprolol SuccinateMetoprolol Succinate12325
Tamsulosin HclTamsulosin Hcl11631
Escitalopram OxalateEscitalopram Oxalate11427
LisinoprilLisinopril11030
LorazepamLorazepam10418
PrednisonePrednisone10371
Duloxetine HclDuloxetine Hcl10127
AzithromycinAzithromycin9971
EliquisApixaban98suppressed
SimvastatinSimvastatin9427
Pravastatin SodiumPravastatin Sodium8322
AlprazolamAlprazolam8020
Zolpidem TartrateZolpidem Tartrate7823
Metformin HclMetformin Hcl7722
IrbesartanIrbesartan7117
Losartan PotassiumLosartan Potassium6517
OmeprazoleOmeprazole6323
Amitriptyline HclAmitriptyline Hcl59suppressed
SynthroidLevothyroxine Sodium5914
Venlafaxine Hcl ErVenlafaxine Hcl58suppressed
Doxycycline HyclateDoxycycline Hyclate5744
Pantoprazole SodiumPantoprazole Sodium5316
AllopurinolAllopurinol5115
Methenamine HippurateMethenamine Hippurate51suppressed
FarxigaDapagliflozin Propanediol50suppressed
HydrochlorothiazideHydrochlorothiazide5017
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen50suppressed
MeloxicamMeloxicam4918
FurosemideFurosemide4812
Metoprolol TartrateMetoprolol Tartrate48suppressed
RizatriptanRizatriptan Benzoate48suppressed
DiazepamDiazepam44suppressed
OzempicSemaglutide43suppressed
Sertraline HclSertraline Hcl4111
CefuroximeCefuroxime Axetil4019
Albuterol Sulfate HfaAlbuterol Sulfate3817
Trazodone HclTrazodone Hcl38suppressed
CarvedilolCarvedilol3511
Metformin Hcl ErMetformin Hcl34suppressed
FamotidineFamotidine33suppressed
Quetiapine FumarateQuetiapine Fumarate33suppressed
RamiprilRamipril32suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst3119
PaxlovidNirmatrelvir/Ritonavir3131
AmoxicillinAmoxicillin3021
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav3025
Tramadol HclTramadol Hcl30suppressed
Ciprofloxacin HclCiprofloxacin Hcl2821
MethimazoleMethimazole28suppressed
Donepezil HclDonepezil Hcl27suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide27suppressed
Bupropion XlBupropion Hcl26suppressed
Fluoxetine HclFluoxetine Hcl25suppressed
AtenololAtenolol24suppressed
CelecoxibCelecoxib24suppressed
EzetimibeEzetimibe24suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl21suppressed
Zolpidem Tartrate ErZolpidem Tartrate21suppressed
CefadroxilCefadroxil2015
Warfarin SodiumWarfarin Sodium20suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril19suppressed
ClonazepamClonazepam19suppressed
Potassium ChloridePotassium Chloride19suppressed
SpironolactoneSpironolactone18suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium16suppressed
Fluticasone PropionateFluticasone Propionate16suppressed
MyrbetriqMirabegron16suppressed
Candesartan CilexetilCandesartan Cilexetil15suppressed
LansoprazoleLansoprazole15suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter15suppressed
BumetanideBumetanide14suppressed
Citalopram HbrCitalopram Hydrobromide14suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl14suppressed
Ibandronate SodiumIbandronate Sodium14suppressed
PregabalinPregabalin14suppressed
Sumatriptan SuccinateSumatriptan Succinate14suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid14suppressed
EszopicloneEszopiclone13suppressed
FenofibrateFenofibrate Nanocrystallized13suppressed
FinasterideFinasteride13suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim13suppressed
Amlodipine-OlmesartanAmlodipine Bes/Olmesartan Med12suppressed
Bisoprolol-HydrochlorothiazideBisoprolol/Hydrochlorothiazide12suppressed
Breo ElliptaFluticasone/Vilanterol12suppressed
Hydralazine HclHydralazine Hcl12suppressed
MethylprednisoloneMethylprednisolone1211
NitrofurantoinNitrofurantoin Macrocrystal12suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide12suppressed
BrilintaTicagrelor11suppressed
Cartia XtDiltiazem Hcl11suppressed
LevofloxacinLevofloxacin11suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide11suppressed
ValacyclovirValacyclovir Hcl11suppressed
Verapamil ErVerapamil Hcl11suppressed

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 $2,540.87 · 127 records PFIZER INC. ABRYSVO, AIRSUPRA, AREXVY, Auvelity, BREZTRI, CAPVAXIVE, COMIRNATY, Cologuard Collection Kit, ELIQUIS, FARXIGA, FLUBLOK QUADRIVALENT NORTHERN HEMISPHERE, Fluad, Flucelvax, GARDASIL 9, GEMTESA, HA MINUTEMAN G3-R, INSPIRE, JARDIANCE, Korlym, MOUNJARO, NEXLETOL, NURTEC ODT, OTEZLA, Ozempic, PAXLOVID, PREVNAR 20, QULIPTA, REPATHA, Rybelsus, SHINGRIX, SPRAVATO, Symbravo, UBRELVY, VRAYLAR, Wegovy, XIFAXAN, ZAVZPRET, ZEPBOUND 7
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