Healthcare provider profile · identity verified

Brian R Irwin, D.O.

Allopathic & Osteopathic Physicians|Family Medicine · TAMWORTH, NH · NPI 1427070630

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 Brian R Irwin, D.O. received $40.12 in general payments during 2025 across 2 reported records.

ABBVIE INC. accounted for 52.2% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 2 associated products.

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

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 LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Linzess by this doctor in 2024.

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 28 claims for Synthroid 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 30 claims for Ozempic by this doctor in 2024.

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

Payment overview · 2025

General Payments

$40.12

2 reported records · 2 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
ABBVIE INC. Unresolved — no canonical attribution shown $20.9352.2%12025
Novo Nordisk Inc Unresolved — no canonical attribution shown $19.1947.8%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$40.122

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
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $20.93 1 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $19.19 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
Ozempic
ozempic
2025 Ozempic 2024 30 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 LINZESS
open payments reported associated product
CMS Open Payments — General Payments
87954 supporting records · 21815 recipient NPIs · example record 1201352608
Linzess · 2024
Exact normalized brand match · 1 Part D row
12 suppressed by CMS
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
28 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
30 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
LisinoprilLisinopril589154
Atorvastatin CalciumAtorvastatin Calcium450126
Rosuvastatin CalciumRosuvastatin Calcium417111
Amlodipine BesylateAmlodipine Besylate30485
Levothyroxine SodiumLevothyroxine Sodium28964
Pantoprazole SodiumPantoprazole Sodium26471
Losartan PotassiumLosartan Potassium23158
Metoprolol SuccinateMetoprolol Succinate22164
GabapentinGabapentin20045
Albuterol Sulfate HfaAlbuterol Sulfate19649
EliquisApixaban19140
Tamsulosin HclTamsulosin Hcl18645
HydrochlorothiazideHydrochlorothiazide18148
OmeprazoleOmeprazole17746
Metformin HclMetformin Hcl17139
Trazodone HclTrazodone Hcl16736
SimvastatinSimvastatin14836
Metoprolol TartrateMetoprolol Tartrate14539
Potassium ChloridePotassium Chloride13939
MeloxicamMeloxicam12730
Escitalopram OxalateEscitalopram Oxalate12126
Tramadol HclTramadol Hcl12123
ChlorthalidoneChlorthalidone11829
Duloxetine HclDuloxetine Hcl11025
AtenololAtenolol10824
JanuviaSitagliptin Phosphate10722
Quetiapine FumarateQuetiapine Fumarate9921
MethylprednisoloneMethylprednisolone9790
LorazepamLorazepam9431
Oxycodone HclOxycodone Hcl8716
AlprazolamAlprazolam8614
FurosemideFurosemide8429
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen8312
PregabalinPregabalin81suppressed
CelecoxibCelecoxib8018
Citalopram HbrCitalopram Hydrobromide7418
Cyclobenzaprine HclCyclobenzaprine Hcl7427
ClonazepamClonazepam7214
SpironolactoneSpironolactone6718
Sertraline HclSertraline Hcl6112
Fluticasone PropionateFluticasone Propionate5923
CarvedilolCarvedilol5613
Esomeprazole MagnesiumEsomeprazole Magnesium5611
Montelukast SodiumMontelukast Sodium5414
AllopurinolAllopurinol5217
EzetimibeEzetimibe5214
AripiprazoleAripiprazole5114
FamotidineFamotidine5013
Amitriptyline HclAmitriptyline Hcl4912
Bupropion XlBupropion Hcl4913
SymbicortBudesonide/Formoterol Fumarate4813
Buspirone HclBuspirone Hcl46suppressed
Doxepin HclDoxepin Hcl46suppressed
Pravastatin SodiumPravastatin Sodium4611
Bupropion Hcl SrBupropion Hcl40suppressed
Zolpidem TartrateZolpidem Tartrate37suppressed
DiazepamDiazepam3611
AzithromycinAzithromycin3535
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine35suppressed
Ondansetron HclOndansetron Hcl35suppressed
Tizanidine HclTizanidine Hcl35suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl34suppressed
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate33suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide33suppressed
ClopidogrelClopidogrel Bisulfate3213
Morphine Sulfate ErMorphine Sulfate32suppressed
BaclofenBaclofen31suppressed
EstradiolEstradiol31suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol31suppressed
Sumatriptan SuccinateSumatriptan Succinate3113
Tresiba Flextouch U-100Insulin Degludec31suppressed
Hydralazine HclHydralazine Hcl30suppressed
OzempicSemaglutide3011
ValacyclovirValacyclovir Hcl3012
Alendronate SodiumAlendronate Sodium2911
Memantine HclMemantine Hcl28suppressed
MirtazapineMirtazapine28suppressed
Propranolol HclPropranolol Hcl28suppressed
SynthroidLevothyroxine Sodium28suppressed
Ventolin HfaAlbuterol Sulfate28suppressed
Warfarin SodiumWarfarin Sodium28suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine27suppressed
GlyburideGlyburide27suppressed
TrulicityDulaglutide27suppressed
JardianceEmpagliflozin26suppressed
Advair HfaFluticasone Propion/Salmeterol25suppressed
Fluoxetine HclFluoxetine Hcl25suppressed
KetoconazoleKetoconazole25suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic25suppressed
Oxybutynin Chloride ErOxybutynin Chloride25suppressed
Venlafaxine Hcl ErVenlafaxine Hcl25suppressed
XareltoRivaroxaban25suppressed
Doxycycline HyclateDoxycycline Hyclate2319
Diclofenac SodiumDiclofenac Sodium22suppressed
Spiriva HandihalerTiotropium Bromide22suppressed
AcyclovirAcyclovir21suppressed
Ciprofloxacin HclCiprofloxacin Hcl2118
FinasterideFinasteride20suppressed
Methylphenidate HclMethylphenidate Hcl20suppressed
PrimidonePrimidone20suppressed
RisperidoneRisperidone20suppressed
Donepezil HclDonepezil Hcl19suppressed
GlipizideGlipizide19suppressed
Paroxetine HclParoxetine Hcl19suppressed
Atovaquone-Proguanil HclAtovaquone/Proguanil Hcl1816
Clonidine HclClonidine Hcl18suppressed
Fludrocortisone AcetateFludrocortisone Acetate18suppressed
IbuprofenIbuprofen18suppressed
Combivent RespimatIpratropium/Albuterol Sulfate17suppressed
Fluocinolone AcetonideFluocinolone Acetonide17suppressed
LamotrigineLamotrigine17suppressed
Levemir FlexpenInsulin Detemir17suppressed
PrednisonePrednisone17suppressed
SucralfateSucralfate17suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid17suppressed
AmoxicillinAmoxicillin1614
Divalproex Sodium ErDivalproex Sodium16suppressed
Ropinirole HclRopinirole Hcl16suppressed
TopiramateTopiramate16suppressed
Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip1511
LidocaineLidocaine15suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide15suppressed
RizatriptanRizatriptan Benzoate15suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog15suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter15suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1414
Breo ElliptaFluticasone/Vilanterol14suppressed
Glipizide ErGlipizide14suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog14suppressed
Butalbital-Acetaminophen-CaffeButalb/Acetaminophen/Caffeine13suppressed
Prazosin HclPrazosin Hcl13suppressed
ValsartanValsartan13suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog12suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate12suppressed
EntrestoSacubitril/Valsartan12suppressed
EszopicloneEszopiclone12suppressed
FenofibrateFenofibrate Nanocrystallized12suppressed
Hydroxyzine HclHydroxyzine Hcl12suppressed
LinzessLinaclotide12suppressed
Novolog Mix 70-30 FlexpenInsulin Aspart Prot/Insuln Asp12suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen12suppressed
PremarinEstrogens, Conjugated12suppressed
Sildenafil CitrateSildenafil Citrate12suppressed
Terazosin HclTerazosin Hcl12suppressed
Triamcinolone AcetonideTriamcinolone Acetonide12suppressed
Verapamil ErVerapamil Hcl12suppressed
Verapamil HclVerapamil Hcl12suppressed

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 $40.12 · 2 records ABBVIE INC. Ozempic, VRAYLAR 3
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

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