Healthcare provider profile · identity verified

William R Blair, D.O.

Family Practice · SWANSEA, MA · NPI 1629428644

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 Calcium470145
LisinoprilLisinopril385113
Amlodipine BesylateAmlodipine Besylate31491
Levothyroxine SodiumLevothyroxine Sodium27475
OmeprazoleOmeprazole27382
Losartan PotassiumLosartan Potassium23066
LorazepamLorazepam20752
GabapentinGabapentin19439
Metformin HclMetformin Hcl19453
SimvastatinSimvastatin17959
Pantoprazole SodiumPantoprazole Sodium16546
Trazodone HclTrazodone Hcl15848
Metoprolol SuccinateMetoprolol Succinate15543
Rosuvastatin CalciumRosuvastatin Calcium15052
HydrochlorothiazideHydrochlorothiazide13538
Tamsulosin HclTamsulosin Hcl13435
FurosemideFurosemide13236
Sertraline HclSertraline Hcl12036
Oxycodone HclOxycodone Hcl11324
AllopurinolAllopurinol10332
Tramadol HclTramadol Hcl10334
ClonazepamClonazepam10014
Pravastatin SodiumPravastatin Sodium9728
Metoprolol TartrateMetoprolol Tartrate9627
Zolpidem TartrateZolpidem Tartrate9524
PrednisonePrednisone9250
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen8718
FamotidineFamotidine8423
Albuterol Sulfate HfaAlbuterol Sulfate8132
Azelastine HclAzelastine Hcl7737
Citalopram HbrCitalopram Hydrobromide7423
AlprazolamAlprazolam7216
JardianceEmpagliflozin7217
DiazepamDiazepam6917
EzetimibeEzetimibe6720
IbuprofenIbuprofen6516
Metformin Hcl ErMetformin Hcl6523
AtenololAtenolol6419
Escitalopram OxalateEscitalopram Oxalate5817
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide5414
Montelukast SodiumMontelukast Sodium5419
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine51suppressed
Doxazosin MesylateDoxazosin Mesylate5113
MeloxicamMeloxicam5113
OzempicSemaglutide50suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl4915
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide4816
ClopidogrelClopidogrel Bisulfate46suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog4511
EliquisApixaban4414
Meclizine HclMeclizine Hcl43suppressed
FinasterideFinasteride4215
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen4211
LovastatinLovastatin4212
Triamcinolone AcetonideTriamcinolone Acetonide4219
Clonidine HclClonidine Hcl41suppressed
Fluoxetine HclFluoxetine Hcl4016
Potassium ChloridePotassium Chloride4014
CelecoxibCelecoxib3911
Quetiapine FumarateQuetiapine Fumarate37suppressed
TemazepamTemazepam37suppressed
Oxybutynin Chloride ErOxybutynin Chloride3614
Fluticasone PropionateFluticasone Propionate3517
Ondansetron OdtOndansetron3512
Glipizide ErGlipizide34suppressed
MirtazapineMirtazapine34suppressed
NaproxenNaproxen33suppressed
AzithromycinAzithromycin3230
CarvedilolCarvedilol3211
Donepezil HclDonepezil Hcl3211
Naltrexone HclNaltrexone Hcl32suppressed
Hydromorphone HclHydromorphone Hcl31suppressed
Venlafaxine Hcl ErVenlafaxine Hcl31suppressed
BaclofenBaclofen30suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium30suppressed
Amitriptyline HclAmitriptyline Hcl29suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst2926
Paroxetine HclParoxetine Hcl29suppressed
GlipizideGlipizide28suppressed
IrbesartanIrbesartan28suppressed
PregabalinPregabalin28suppressed
Alendronate SodiumAlendronate Sodium27suppressed
Buspirone HclBuspirone Hcl27suppressed
Doxycycline HyclateDoxycycline Hyclate2720
MounjaroTirzepatide27suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav2620
Bupropion XlBupropion Hcl26suppressed
JanuviaSitagliptin Phosphate26suppressed
Klor-Con M20Potassium Chloride26suppressed
NystatinNystatin26suppressed
AmoxicillinAmoxicillin24suppressed
SynthroidLevothyroxine Sodium24suppressed
TrulicityDulaglutide24suppressed
ValsartanValsartan24suppressed
KetoconazoleKetoconazole23suppressed
Ondansetron HclOndansetron Hcl2311
Bupropion HclBupropion Hcl22suppressed
Doxepin HclDoxepin Hcl22suppressed
LevetiracetamLevetiracetam22suppressed
Pioglitazone HclPioglitazone Hcl22suppressed
ValacyclovirValacyclovir Hcl22suppressed
Ventolin HfaAlbuterol Sulfate2211
Butalbital-Acetaminophen-CaffeButalb/Acetaminophen/Caffeine21suppressed
HydrocortisoneHydrocortisone21suppressed
Sildenafil CitrateSildenafil Citrate21suppressed
Acetaminophen-CodeineAcetaminophen With Codeine20suppressed
PaxlovidNirmatrelvir/Ritonavir1919
Terazosin HclTerazosin Hcl19suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid18suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl17suppressed
Duloxetine HclDuloxetine Hcl17suppressed
SpironolactoneSpironolactone17suppressed
TestosteroneTestosterone17suppressed
Warfarin SodiumWarfarin Sodium17suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril16suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog16suppressed
CephalexinCephalexin1613
Clobetasol PropionateClobetasol Propionate16suppressed
Repatha SyringeEvolocumab16suppressed
Buprenorphine-NaloxoneBuprenorphine Hcl/Naloxone Hcl15suppressed
Bupropion Hcl SrBupropion Hcl15suppressed
GlimepirideGlimepiride15suppressed
Hydroxyzine HclHydroxyzine Hcl15suppressed
LamotrigineLamotrigine15suppressed
Methadone HclMethadone Hcl15suppressed
OxycontinOxycodone Hcl15suppressed
Xtampza ErOxycodone Myristate15suppressed
Labetalol HclLabetalol Hcl14suppressed
SucralfateSucralfate14suppressed
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic14suppressed
Arnuity ElliptaFluticasone Furoate13suppressed
LoperamideLoperamide Hcl13suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic13suppressed
Sumatriptan SuccinateSumatriptan Succinate13suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic13suppressed
Varenicline TartrateVarenicline Tartrate13suppressed
Wixela InhubFluticasone Propion/Salmeterol13suppressed
Alprazolam ErAlprazolam12suppressed
CarisoprodolCarisoprodol12suppressed
LevofloxacinLevofloxacin12suppressed
MesalamineMesalamine12suppressed
NabumetoneNabumetone12suppressed
Propranolol HclPropranolol Hcl12suppressed
BudesonideBudesonide11suppressed
CalcitriolCalcitriol11suppressed
Fludrocortisone AcetateFludrocortisone Acetate11suppressed
LantusInsulin Glargine,hum.Rec.Anlog11suppressed
MyrbetriqMirabegron11suppressed
NitrofurantoinNitrofurantoin Macrocrystal11suppressed
PhenobarbitalPhenobarbital11suppressed
SymbicortBudesonide/Formoterol Fumarate11suppressed
SynjardyEmpagliflozin/Metformin Hcl11suppressed
Tolterodine Tartrate ErTolterodine Tartrate11suppressed
XifaxanRifaximin11suppressed

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