Healthcare provider profile · identity verified

William Nassour, MD

Allopathic & Osteopathic Physicians|Internal Medicine · GOODYEAR, AZ · NPI 1104131820

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 William Nassour, MD received $517.60 in general payments during 2025 across 24 reported records.

Otsuka America Pharmaceutical, Inc. accounted for 16.4% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 12 associated products.

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

Aimmune Therapeutics, 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 ZENPEP as an associated drug or biological on 32144 records involving 12432 distinct recipient NPIs. Public Medicare Part D data also shows 22 claims for Zenpep by this doctor in 2024.

E.R. Squibb & Sons, L.L.C. 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 27956 records involving 14870 distinct recipient NPIs. Public Medicare Part D data also shows 973 claims for Eliquis by this doctor in 2024.

Lundbeck 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 ABILIFY MAINTENA as an associated drug or biological on 2902 records involving 986 distinct recipient NPIs. Public Medicare Part D data also shows 17 claims for Abilify Maintena by this doctor in 2024.

Otsuka America Pharmaceutical, 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 ABILIFY MAINTENA as an associated drug or biological on 27924 records involving 10497 distinct recipient NPIs. Public Medicare Part D data also shows 17 claims for Abilify Maintena by this doctor in 2024.

UCB, 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 Briviact as an associated drug or biological on 13595 records involving 4444 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Briviact by this doctor in 2024.

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

Payment overview · 2025

General Payments

$517.60

24 reported records · 13 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
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $84.9616.4%42025
Teva Pharmaceuticals USA, Inc. Unresolved — no canonical attribution shown $81.7915.8%42025
Lundbeck LLC Unresolved — no canonical attribution shown $62.4412.1%32025
Ardelyx, Inc. Unresolved — no canonical attribution shown $56.4210.9%22025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $42.888.3%22025
UCB, Inc. Unresolved — no canonical attribution shown $41.298.0%22025
Aimmune Therapeutics, Inc. Unresolved — no canonical attribution shown $28.575.5%12025
PROTEGA PHARMACEUTIALS INC Unresolved — no canonical attribution shown $27.925.4%12025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $20.604.0%12025
Abbott Laboratories Unresolved — no canonical attribution shown $20.263.9%12025
Medtronic, Inc. Medtronic, Inc.
exact · evidence 2025-07-22
$19.333.7%12025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $18.143.5%12025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $13.002.5%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$517.6024

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
REXULTI
Normalized: rexulti
Drug Lundbeck LLC, Otsuka America Pharmaceutical, Inc. $147.40 7 2025
Source payment records
AUSTEDO XR
Normalized: austedo xr
Drug Teva Pharmaceuticals USA, Inc. $81.79 4 2025
Source payment records
IBSRELA
Normalized: ibsrela
Drug Ardelyx, Inc. $56.42 2 2025
Source payment records
Kerendia
Normalized: kerendia
Drug Bayer Healthcare Pharmaceuticals Inc. $42.88 2 2025
Source payment records
Briviact
Normalized: briviact
Drug UCB, Inc. $41.29 2 2025
Source payment records
ZENPEP
Normalized: zenpep
Drug Aimmune Therapeutics, Inc. $28.57 1 2025
Source payment records
ROXYBOND
Normalized: roxybond
Drug PROTEGA PHARMACEUTIALS INC $27.92 1 2025
Source payment records
COBENFY
Normalized: cobenfy
Drug E.R. Squibb & Sons, L.L.C. $20.60 1 2025
Source payment records
OCTRODE
Normalized: octrode
Device Abbott Laboratories $20.26 1 2025
Source payment records
INTELLIS ADAPTIVESTIM
Normalized: intellis adaptivestim
Device Medtronic, Inc. $19.33 1 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $18.14 1 2025
Source payment records
Auvelity
Normalized: auvelity
Drug Axsome Therapeutics, Inc. $13.00 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
Briviact
briviact
2025 Briviact 2024 16
Beneficiary count suppressed
exact normalized Medicare Part D
ZENPEP
zenpep
2025 Zenpep 2024 22
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
Aimmune Therapeutics, Inc.
Exact reporting entity; no affiliate inference
2025 ZENPEP
open payments reported associated product
CMS Open Payments — General Payments
32144 supporting records · 12432 recipient NPIs · example record 1249641927
Zenpep · 2024
Exact normalized brand match · 1 Part D row
22 suppressed by CMS
E.R. Squibb & Sons, L.L.C.
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
27956 supporting records · 14870 recipient NPIs · example record 1184377713
Eliquis · 2024
Exact normalized brand match · 1 Part D row
973 134
Lundbeck LLC
Exact reporting entity; no affiliate inference
2025 ABILIFY MAINTENA
open payments reported associated product
CMS Open Payments — General Payments
2902 supporting records · 986 recipient NPIs · example record 1251759994
Abilify Maintena · 2024
Exact normalized brand match · 1 Part D row
17 suppressed by CMS
Otsuka America Pharmaceutical, Inc.
Exact reporting entity; no affiliate inference
2025 ABILIFY MAINTENA
open payments reported associated product
CMS Open Payments — General Payments
27924 supporting records · 10497 recipient NPIs · example record 1227267721
Abilify Maintena · 2024
Exact normalized brand match · 1 Part D row
17 suppressed by CMS
UCB, Inc.
Exact reporting entity; no affiliate inference
2025 Briviact
open payments reported associated product
CMS Open Payments — General Payments
13595 supporting records · 4444 recipient NPIs · example record 1224348489
Briviact · 2024
Exact normalized brand match · 1 Part D row
16 suppressed by CMS

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 Calcium1234291
EliquisApixaban973134
GabapentinGabapentin973234
Levothyroxine SodiumLevothyroxine Sodium714155
Amlodipine BesylateAmlodipine Besylate695171
Tamsulosin HclTamsulosin Hcl505117
Trazodone HclTrazodone Hcl503152
LisinoprilLisinopril476113
Metoprolol TartrateMetoprolol Tartrate465110
FurosemideFurosemide451145
Metformin HclMetformin Hcl412114
Potassium ChloridePotassium Chloride39495
Sertraline HclSertraline Hcl37696
Pantoprazole SodiumPantoprazole Sodium37493
CarvedilolCarvedilol32183
LevetiracetamLevetiracetam30967
BaclofenBaclofen28062
Divalproex SodiumDivalproex Sodium27773
Losartan PotassiumLosartan Potassium27776
Hydralazine HclHydralazine Hcl26581
MirtazapineMirtazapine26364
Hydroxyzine HclHydroxyzine Hcl25488
ClopidogrelClopidogrel Bisulfate23465
Donepezil HclDonepezil Hcl23148
Metoprolol SuccinateMetoprolol Succinate19272
Ondansetron HclOndansetron Hcl18368
Memantine HclMemantine Hcl18040
Midodrine HclMidodrine Hcl17766
Benztropine MesylateBenztropine Mesylate17527
Lantus SolostarInsulin Glargine,hum.Rec.Anlog17457
RisperidoneRisperidone16835
Duloxetine HclDuloxetine Hcl16542
Buspirone HclBuspirone Hcl16345
Enoxaparin SodiumEnoxaparin Sodium16337
Ipratropium-AlbuterolIpratropium/Albuterol Sulfate16162
MethocarbamolMethocarbamol16137
SimvastatinSimvastatin15634
Insulin Lispro Kwikpen U-100Insulin Lispro15379
BumetanideBumetanide15035
Montelukast SodiumMontelukast Sodium14631
LactuloseLactulose13849
Oxybutynin Chloride ErOxybutynin Chloride13725
Escitalopram OxalateEscitalopram Oxalate13143
Insulin Glargine-YfgnInsulin Glargine-Yfgn12872
Sodium Chloride0.9 % Sodium Chloride12162
Albuterol Sulfate HfaAlbuterol Sulfate11959
Amiodarone HclAmiodarone Hcl11930
Rosuvastatin CalciumRosuvastatin Calcium11839
Insulin LisproInsulin Lispro11750
Bupropion XlBupropion Hcl11521
Valproic AcidValproic Acid (As Sodium Salt)11122
Pravastatin SodiumPravastatin Sodium10923
PrednisonePrednisone10950
SpironolactoneSpironolactone10730
FamotidineFamotidine10432
Citalopram HbrCitalopram Hydrobromide10329
Quetiapine FumarateQuetiapine Fumarate10346
FinasterideFinasteride9924
Tizanidine HclTizanidine Hcl9730
HydrochlorothiazideHydrochlorothiazide9527
AllopurinolAllopurinol9225
Divalproex Sodium ErDivalproex Sodium9215
Fluticasone PropionateFluticasone Propionate8835
LantusInsulin Glargine,hum.Rec.Anlog8629
Carbidopa-LevodopaCarbidopa/Levodopa8219
Nifedipine ErNifedipine8229
Clonidine HclClonidine Hcl7827
OlanzapineOlanzapine7725
Cyclobenzaprine HclCyclobenzaprine Hcl7629
Esomeprazole MagnesiumEsomeprazole Magnesium7415
Fluoxetine HclFluoxetine Hcl7324
Albuterol SulfateAlbuterol Sulfate7237
Ropinirole HclRopinirole Hcl7118
Propranolol HclPropranolol Hcl6923
AmantadineAmantadine Hcl6811
AripiprazoleAripiprazole6821
GlipizideGlipizide6822
OxcarbazepineOxcarbazepine6711
AtenololAtenolol6613
Sevelamer CarbonateSevelamer Carbonate6623
Venlafaxine Hcl ErVenlafaxine Hcl6611
Alendronate SodiumAlendronate Sodium6519
Isosorbide Mononitrate ErIsosorbide Mononitrate6516
Oxybutynin ChlorideOxybutynin Chloride6418
Doxycycline HyclateDoxycycline Hyclate6144
JardianceEmpagliflozin6017
LamotrigineLamotrigine6012
Methenamine HippurateMethenamine Hippurate6012
BudesonideBudesonide5521
Vancomycin HclVancomycin Hcl5425
FarxigaDapagliflozin Propanediol5212
OmeprazoleOmeprazole5120
Ciprofloxacin HclCiprofloxacin Hcl5043
Heparin SodiumHeparin Sodium,porcine5015
Diltiazem 24hr ErDiltiazem Hcl49suppressed
LevofloxacinLevofloxacin4933
Terazosin HclTerazosin Hcl48suppressed
XareltoRivaroxaban4817
GemtesaVibegron45suppressed
LatanoprostLatanoprost4519
TopiramateTopiramate44suppressed
Hydroxyzine PamoateHydroxyzine Pamoate4315
Incruse ElliptaUmeclidinium Bromide43suppressed
Invega SustennaPaliperidone Palmitate43suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol4215
DigoxinDigoxin40suppressed
Paroxetine HclParoxetine Hcl40suppressed
Bupropion Hcl SrBupropion Hcl39suppressed
FluconazoleFluconazole3917
MovantikNaloxegol Oxalate39suppressed
CarbamazepineCarbamazepine38suppressed
LinzessLinaclotide38suppressed
Chlorhexidine GluconateChlorhexidine Gluconate3720
ClozapineClozapine37suppressed
Pioglitazone HclPioglitazone Hcl3613
TorsemideTorsemide36suppressed
LovastatinLovastatin35suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim3519
EzetimibeEzetimibe34suppressed
Fludrocortisone AcetateFludrocortisone Acetate34suppressed
KetoconazoleKetoconazole3417
Ondansetron OdtOndansetron3413
CephalexinCephalexin3331
Dalfampridine ErDalfampridine33suppressed
NystatinNystatin3326
OzempicSemaglutide33suppressed
Warfarin SodiumWarfarin Sodium33suppressed
Admelog SolostarInsulin Lispro3213
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav3227
FenofibrateFenofibrate32suppressed
HumalogInsulin Lispro32suppressed
LubiprostoneLubiprostone32suppressed
PrimidonePrimidone32suppressed
XifaxanRifaximin32suppressed
CefdinirCefdinir3126
CeftriaxoneCeftriaxone Sodium3120
HaloperidolHaloperidol31suppressed
Humalog Kwikpen U-100Insulin Lispro3118
HydrocortisoneHydrocortisone31suppressed
EntrestoSacubitril/Valsartan30suppressed
Cefepime HclCefepime Hcl2916
Glipizide ErGlipizide29suppressed
LansoprazoleLansoprazole29suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl29suppressed
Diltiazem 24hr Er (La)Diltiazem Hcl28suppressed
IbuprofenIbuprofen28suppressed
Isosorbide DinitrateIsosorbide Dinitrate28suppressed
Brimonidine TartrateBrimonidine Tartrate26suppressed
Metoclopramide HclMetoclopramide Hcl2612
SucralfateSucralfate26suppressed
Dicyclomine HclDicyclomine Hcl25suppressed
GlimepirideGlimepiride25suppressed
LokelmaSodium Zirconium Cyclosilicate2511
Novolog FlexpenInsulin Aspart2511
TivicayDolutegravir Sodium25suppressed
Diltiazem HclDiltiazem Hcl24suppressed
MyrbetriqMirabegron24suppressed
TeriflunomideTeriflunomide24suppressed
TrulicityDulaglutide24suppressed
AzithromycinAzithromycin2318
Fluvoxamine MaleateFluvoxamine Maleate23suppressed
Tolterodine TartrateTolterodine Tartrate23suppressed
Calcium AcetateCalcium Acetate22suppressed
Hydroxychloroquine SulfateHydroxychloroquine Sulfate22suppressed
ZenpepLipase/Protease/Amylase22suppressed
Cinacalcet HclCinacalcet Hcl21suppressed
DaptomycinDaptomycin21suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl21suppressed
Doxazosin MesylateDoxazosin Mesylate21suppressed
NyamycNystatin2118
Amiloride HclAmiloride Hcl20suppressed
Flecainide AcetateFlecainide Acetate20suppressed
LorazepamLorazepam2011
MeropenemMeropenem2012
PermethrinPermethrin2019
CilostazolCilostazol19suppressed
ColchicineColchicine19suppressed
IngrezzaValbenazine Tosylate19suppressed
NuplazidPimavanserin Tartrate19suppressed
ErythromycinErythromycin Base18suppressed
Labetalol HclLabetalol Hcl18suppressed
MethimazoleMethimazole18suppressed
SantylCollagenase Clostridium Hist.1814
Silver SulfadiazineSilver Sulfadiazine1815
Abilify MaintenaAripiprazole17suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog17suppressed
Chlorpromazine HclChlorpromazine Hcl17suppressed
FetrojaCefiderocol Sulfate Tosylate17suppressed
SpsSodium Polystyrene Sulfon/Sorb1711
Tramadol HclTramadol Hcl17suppressed
AcetylcysteineAcetylcysteine16suppressed
Arformoterol TartrateArformoterol Tartrate16suppressed
BriviactBrivaracetam16suppressed
CorlanorIvabradine Hcl16suppressed
EntacaponeEntacapone16suppressed
ErtapenemErtapenem Sodium16suppressed
JanuviaSitagliptin Phosphate16suppressed
Metformin Hcl ErMetformin Hcl16suppressed
NaproxenNaproxen16suppressed
Novolin RInsulin Regular, Human16suppressed
Timolol MaleateTimolol Maleate16suppressed
Bethanechol ChlorideBethanechol Chloride15suppressed
Carbamazepine ErCarbamazepine15suppressed
Clindamycin HclClindamycin Hcl15suppressed
GemfibrozilGemfibrozil15suppressed
LidocaineLidocaine15suppressed
MetronidazoleMetronidazole15suppressed
MounjaroTirzepatide15suppressed
ClonidineClonidine14suppressed
EpogenEpoetin Alfa14suppressed
Insulin Aspart FlexpenInsulin Aspart14suppressed
Lithium Carbonate ErLithium Carbonate14suppressed
Meclizine HclMeclizine Hcl14suppressed
ScopolamineScopolamine14suppressed
Selegiline HclSelegiline Hcl14suppressed
TradjentaLinagliptin14suppressed
ValsartanValsartan14suppressed
ZonisamideZonisamide14suppressed
Cefazolin SodiumCefazolin Sodium13suppressed
ChlorthalidoneChlorthalidone13suppressed
DapagliflozinDapagliflozin Propanediol13suppressed
Doxepin HclDoxepin Hcl13suppressed
Doxycycline MonohydrateDoxycycline Monohydrate1311
Glucagon Emergency KitGlucagon13suppressed
Prednisolone AcetatePrednisolone Acetate13suppressed
ProbenecidProbenecid13suppressed
Sumatriptan SuccinateSumatriptan Succinate13suppressed
SynthroidLevothyroxine Sodium13suppressed
AdmelogInsulin Lispro12suppressed
BicalutamideBicalutamide12suppressed
Clobetasol PropionateClobetasol Propionate12suppressed
CreonLipase/Protease/Amylase12suppressed
DeferasiroxDeferasirox12suppressed
FenofibrateFenofibrate Nanocrystallized12suppressed
Lidocaine HclLidocaine Hcl/Pf1212
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide12suppressed
LoxapineLoxapine Succinate12suppressed
Novolin R FlexpenInsulin Regular, Human12suppressed
PregabalinPregabalin12suppressed
Promethazine HclPromethazine Hcl12suppressed
RetacritEpoetin Alfa-Epbx12suppressed
Triamcinolone AcetonideTriamcinolone Acetonide12suppressed
Vancomycin HclVancomycin/Water For Inj (Peg)12suppressed
Venlafaxine HclVenlafaxine Hcl12suppressed
XiidraLifitegrast12suppressed
Ampicillin-SulbactamAmpicillin Sod/Sulbactam Sod11suppressed
AnastrozoleAnastrozole11suppressed
CholestyramineCholestyramine (With Sugar)11suppressed
Humulin 70-30Insulin Nph Hum/Reg Insulin Hm11suppressed
HydroxyureaHydroxyurea11suppressed
LevemirInsulin Detemir11suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide11suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst11suppressed
Olanzapine OdtOlanzapine11suppressed
Piperacillin-TazobactamPiperacillin Sodium/Tazobactam11suppressed

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 $517.60 · 24 records Otsuka America Pharmaceutical, Inc. AUSTEDO XR, Auvelity, Briviact, CAPLYTA, COBENFY, IBSRELA, INTELLIS ADAPTIVESTIM, Kerendia, OCTRODE, REXULTI, ROXYBOND, ZENPEP 5
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