Healthcare provider profile · identity verified

Gregory Edward Buck, M.D.

Allopathic & Osteopathic Physicians|Family Medicine · BREMEN, IN · NPI 1144269861

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 Edward Buck, M.D. received $1,056.17 in general payments during 2025 across 57 reported records.

AstraZeneca Pharmaceuticals LP accounted for 29.1% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 30 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Farxiga, Jardiance, Mounjaro, Ozempic, Rybelsus, Trelegy Ellipta.

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 39 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 FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 43 claims for Farxiga by this doctor in 2024.

Boehringer Ingelheim Pharmaceuticals, 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 JARDIANCE as an associated drug or biological on 123636 records involving 49438 distinct recipient NPIs. Public Medicare Part D data also shows 53 claims for Jardiance 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 24 claims for Trelegy Ellipta by this doctor in 2024.

Lilly USA, 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 JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 53 claims for Jardiance by this doctor in 2024.

Lilly USA, 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 MOUNJARO as an associated drug or biological on 186719 records involving 66436 distinct recipient NPIs. Public Medicare Part D data also shows 31 claims for Mounjaro by this doctor in 2024.

Lilly USA, 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 TRULICITY as an associated drug or biological on 71 records involving 57 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Trulicity 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 31 claims for Ozempic 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 Rybelsus as an associated drug or biological on 161257 records involving 55409 distinct recipient NPIs. Public Medicare Part D data also shows 34 claims for Rybelsus 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 111 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 11 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

$1,056.17

57 reported records · 19 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
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $307.0629.1%152025
Novo Nordisk Inc Unresolved — no canonical attribution shown $134.5512.7%82025
PFIZER INC. Unresolved — no canonical attribution shown $78.437.4%52025
ABBVIE INC. Unresolved — no canonical attribution shown $73.437.0%42025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $54.075.1%32025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $53.715.1%32025
Abbott Laboratories Unresolved — no canonical attribution shown $51.844.9%32025
Exact Sciences Corporation Unresolved — no canonical attribution shown $51.024.8%32025
Lilly USA, LLC Unresolved — no canonical attribution shown $49.794.7%32025
Medtronic, Inc. Medtronic, Inc.
exact · evidence 2025-07-22
$28.862.7%12025
Cumberland Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $27.552.6%12025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $25.142.4%12025
Radius Health, Inc. Unresolved — no canonical attribution shown $23.732.2%12025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $18.871.8%12025
Dexcom, Inc. Unresolved — no canonical attribution shown $17.921.7%12025
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $16.601.6%12025
Seqirus USA Inc Unresolved — no canonical attribution shown $15.381.5%12025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $14.301.4%12025
Amgen Inc. Unresolved — no canonical attribution shown $13.921.3%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$1,056.1757

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
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $146.34 6 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $120.26 7 2025
Source payment records
FARXIGA
Normalized: farxiga
Drug AstraZeneca Pharmaceuticals LP $97.36 4 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $91.70 5 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $91.09 5 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $78.43 5 2025
Source payment records
ZAVZPRET
Normalized: zavzpret
Drug PFIZER INC. $78.43 5 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Boehringer Ingelheim Pharmaceuticals, Inc., Lilly USA, LLC $70.53 4 2025
Source payment records
Kerendia
Normalized: kerendia
Drug Bayer Healthcare Pharmaceuticals Inc. $53.71 3 2025
Source payment records
FREESTYLE LIBRE 3
Normalized: freestyle libre 3
Device Abbott Laboratories $51.84 3 2025
Source payment records
QULIPTA
Normalized: qulipta
Drug ABBVIE INC. $43.70 2 2025
Source payment records
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $43.70 2 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $33.33 2 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $33.33 2 2025
Source payment records
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $31.10 2 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $29.73 2 2025
Source payment records
CONCERTOTM
Normalized: concertotm
Device Medtronic, Inc. $28.86 1 2025
Source payment records
VIBATIV
Normalized: vibativ
Drug Cumberland Pharmaceuticals, Inc. $27.55 1 2025
Source payment records
Auvelity
Normalized: auvelity
Drug Axsome Therapeutics, Inc. $25.14 1 2025
Source payment records
The Cologuard Plus Collection Kit
Normalized: the cologuard plus collection kit
Device Exact Sciences Corporation $19.92 1 2025
Source payment records
TRELEGY ELLIPTA
Normalized: trelegy ellipta
Drug GlaxoSmithKline, LLC. $18.87 1 2025
Source payment records
Dexcom G6 Transmitter
Normalized: dexcom g6 transmitter
Medical Supply Dexcom, Inc. $17.92 1 2025
Source payment records
CAPVAXIVE
Normalized: capvaxive
Biological Merck Sharp & Dohme LLC $16.60 1 2025
Source payment records
GARDASIL 9
Normalized: gardasil 9
Biological Merck Sharp & Dohme LLC $16.60 1 2025
Source payment records
ROTATEQ
Normalized: rotateq
Biological Merck Sharp & Dohme LLC $16.60 1 2025
Source payment records
VAXELIS
Normalized: vaxelis
Biological Merck Sharp & Dohme LLC $16.60 1 2025
Source payment records
Fluad
Normalized: fluad
Biological Seqirus USA Inc $15.38 1 2025
Source payment records
Flucelvax
Normalized: flucelvax
Biological Seqirus USA Inc $15.38 1 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $14.30 1 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $13.92 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
FARXIGA
farxiga
2025 Farxiga 2024 43 exact normalized Medicare Part D
JARDIANCE
jardiance
2025 Jardiance 2024 53 exact normalized Medicare Part D
MOUNJARO
mounjaro
2025 Mounjaro 2024 31
Beneficiary count suppressed
exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 31
Beneficiary count suppressed
exact normalized Medicare Part D
Rybelsus
rybelsus
2025 Rybelsus 2024 34
Beneficiary count suppressed
exact normalized Medicare Part D
TRELEGY ELLIPTA
trelegy ellipta
2025 Trelegy Ellipta 2024 24
Beneficiary count suppressed
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
39 12
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
43 12
Boehringer Ingelheim Pharmaceuticals, Inc.
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
123636 supporting records · 49438 recipient NPIs · example record 1221811583
Jardiance · 2024
Exact normalized brand match · 1 Part D row
53 16
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
24 suppressed by CMS
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
47708 supporting records · 23833 recipient NPIs · example record 1186464557
Jardiance · 2024
Exact normalized brand match · 1 Part D row
53 16
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 MOUNJARO
open payments reported associated product
CMS Open Payments — General Payments
186719 supporting records · 66436 recipient NPIs · example record 1186464455
Mounjaro · 2024
Exact normalized brand match · 1 Part D row
31 suppressed by CMS
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 TRULICITY
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 57 recipient NPIs · example record 1186464601
Trulicity · 2024
Exact normalized brand match · 1 Part D row
14 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
31 suppressed by CMS
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Rybelsus
open payments reported associated product
CMS Open Payments — General Payments
161257 supporting records · 55409 recipient NPIs · example record 1188130076
Rybelsus · 2024
Exact normalized brand match · 1 Part D row
34 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
111 24
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
11 11

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 Calcium520155
LisinoprilLisinopril373109
Amlodipine BesylateAmlodipine Besylate31792
Levothyroxine SodiumLevothyroxine Sodium30180
FurosemideFurosemide25671
Rosuvastatin CalciumRosuvastatin Calcium23274
Potassium ChloridePotassium Chloride22673
HydrochlorothiazideHydrochlorothiazide17761
GabapentinGabapentin14251
Metformin Hcl ErMetformin Hcl14146
Pantoprazole SodiumPantoprazole Sodium13738
Metoprolol SuccinateMetoprolol Succinate13343
Olmesartan MedoxomilOlmesartan Medoxomil12841
FamotidineFamotidine12746
EliquisApixaban11124
OmeprazoleOmeprazole11041
CarvedilolCarvedilol10832
AllopurinolAllopurinol10429
Losartan PotassiumLosartan Potassium10332
Tamsulosin HclTamsulosin Hcl10331
Zolpidem TartrateZolpidem Tartrate10316
Glipizide ErGlipizide9930
Metoprolol TartrateMetoprolol Tartrate9224
EzetimibeEzetimibe8833
Alendronate SodiumAlendronate Sodium8629
ValsartanValsartan8421
MeloxicamMeloxicam7526
Metformin HclMetformin Hcl7323
Pravastatin SodiumPravastatin Sodium6921
CephalexinCephalexin6248
ClopidogrelClopidogrel Bisulfate6119
Sertraline HclSertraline Hcl6121
GlipizideGlipizide5918
Donepezil HclDonepezil Hcl5818
Duloxetine HclDuloxetine Hcl5614
Montelukast SodiumMontelukast Sodium5616
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide5422
SimvastatinSimvastatin5418
Albuterol Sulfate HfaAlbuterol Sulfate5319
JardianceEmpagliflozin5316
PrednisonePrednisone5246
JanuviaSitagliptin Phosphate4912
IndapamideIndapamide4712
Lantus SolostarInsulin Glargine,hum.Rec.Anlog4616
Tramadol HclTramadol Hcl4415
FarxigaDapagliflozin Propanediol4312
Venlafaxine Hcl ErVenlafaxine Hcl4315
Janumet XrSitagliptin Phos/Metformin Hcl42suppressed
Meclizine HclMeclizine Hcl4215
Citalopram HbrCitalopram Hydrobromide3912
Hydroxyzine HclHydroxyzine Hcl3916
SynthroidLevothyroxine Sodium3912
Esomeprazole MagnesiumEsomeprazole Magnesium3811
FinasterideFinasteride3811
Bisoprolol FumarateBisoprolol Fumarate35suppressed
NystatinNystatin3417
Oxybutynin Chloride ErOxybutynin Chloride34suppressed
RybelsusSemaglutide34suppressed
Doxycycline HyclateDoxycycline Hyclate3327
Warfarin SodiumWarfarin Sodium33suppressed
Amitriptyline HclAmitriptyline Hcl32suppressed
AtenololAtenolol3111
MounjaroTirzepatide31suppressed
OzempicSemaglutide31suppressed
Hydralazine HclHydralazine Hcl3011
Bupropion XlBupropion Hcl2911
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen29suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide29suppressed
MyrbetriqMirabegron28suppressed
Oxybutynin ChlorideOxybutynin Chloride27suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril26suppressed
CefdinirCefdinir2625
Doxazosin MesylateDoxazosin Mesylate26suppressed
Humalog Kwikpen U-100Insulin Lispro25suppressed
Fluoxetine HclFluoxetine Hcl24suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter24suppressed
AzithromycinAzithromycin2323
Insulin Lispro Kwikpen U-100Insulin Lispro23suppressed
LorazepamLorazepam23suppressed
MirtazapineMirtazapine2312
AlprazolamAlprazolam22suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide22suppressed
SpironolactoneSpironolactone21suppressed
Novolog FlexpenInsulin Aspart19suppressed
BaclofenBaclofen1811
IrbesartanIrbesartan18suppressed
Memantine HclMemantine Hcl18suppressed
PregabalinPregabalin18suppressed
Propranolol HclPropranolol Hcl18suppressed
SulindacSulindac1812
TorsemideTorsemide18suppressed
Fluticasone PropionateFluticasone Propionate17suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol17suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1613
Escitalopram OxalateEscitalopram Oxalate16suppressed
Benazepril HclBenazepril Hcl15suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate15suppressed
Tizanidine HclTizanidine Hcl15suppressed
Nebivolol HclNebivolol Hcl14suppressed
Terbinafine HclTerbinafine Hcl14suppressed
TrulicityDulaglutide14suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic14suppressed
Levocetirizine DihydrochlorideLevocetirizine Dihydrochloride13suppressed
LovastatinLovastatin13suppressed
Nifedipine ErNifedipine13suppressed
Acetaminophen-CodeineAcetaminophen With Codeine12suppressed
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr12suppressed
MetronidazoleMetronidazole12suppressed
Trazodone HclTrazodone Hcl12suppressed
Bisoprolol-HydrochlorothiazideBisoprolol/Hydrochlorothiazide11suppressed
EszopicloneEszopiclone11suppressed
Ipratropium BromideIpratropium Bromide11suppressed
Midodrine HclMidodrine Hcl11suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic11suppressed
PaxlovidNirmatrelvir/Ritonavir1111
Sumatriptan SuccinateSumatriptan Succinate11suppressed
TradjentaLinagliptin11suppressed

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 $1,056.17 · 57 records AstraZeneca Pharmaceuticals LP AIRSUPRA, Auvelity, BREZTRI, CAPLYTA, CAPVAXIVE, CONCERTOTM, Cologuard Collection Kit, Dexcom G6 Transmitter, FARXIGA, FREESTYLE LIBRE 3, Fluad, Flucelvax, GARDASIL 9, JARDIANCE, Kerendia, MOUNJARO, NURTEC ODT, Ozempic, QULIPTA, REPATHA, ROTATEQ, Rybelsus, TRELEGY ELLIPTA, The Cologuard Plus Collection Kit, UBRELVY, VAXELIS, VIBATIV, VRAYLAR, ZAVZPRET, ZEPBOUND 11
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