Healthcare provider profile · identity verified

William Brad Castle, MD

Allopathic & Osteopathic Physicians|Family Medicine · JACKSON, MS · NPI 1538138391

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 Brad Castle, MD received $1,378.59 in general payments during 2025 across 72 reported records.

AstraZeneca Pharmaceuticals LP accounted for 16.1% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 29 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Eliquis, Ozempic, 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 74 claims for Synthroid by this doctor in 2024.

Astellas Pharma US 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 Myrbetriq as an associated drug or biological on 16 records involving 16 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Myrbetriq 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 SYMBICORT as an associated drug or biological on 71 records involving 51 distinct recipient NPIs. Public Medicare Part D data also shows 11 claims for Symbicort 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.

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 13 claims for Jardiance 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 67 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 95 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

$1,378.59

72 reported records · 16 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 $221.2016.1%112025
Novo Nordisk Inc Unresolved — no canonical attribution shown $220.2916.0%142025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $177.5512.9%42025
Lilly USA, LLC Unresolved — no canonical attribution shown $162.1611.8%102025
PFIZER INC. Unresolved — no canonical attribution shown $86.566.3%52025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $84.026.1%52025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $72.885.3%42025
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $52.693.8%22025
Exact Sciences Corporation Unresolved — no canonical attribution shown $52.503.8%32025
Sumitomo Pharma America, Inc. Unresolved — no canonical attribution shown $51.603.7%32025
Amgen Inc. Unresolved — no canonical attribution shown $48.513.5%32025
ABBVIE INC. Unresolved — no canonical attribution shown $47.943.5%32025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $46.333.4%22025
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $20.001.4%12025
VERTEX PHARMACEUTICALS INCORPORATED Unresolved — no canonical attribution shown $18.081.3%12025
Abbott Laboratories Unresolved — no canonical attribution shown $16.281.2%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$1,378.5972

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
Veozah
Normalized: veozah
Drug Astellas Pharma US Inc $177.55 4 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $163.73 11 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $162.16 10 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $161.50 8 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $147.70 9 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $129.00 9 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $86.56 5 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $85.03 4 2025
Source payment records
Auvelity
Normalized: auvelity
Drug Axsome Therapeutics, Inc. $72.88 4 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $56.56 3 2025
Source payment records
GEMTESA
Normalized: gemtesa
Drug Sumitomo Pharma America, Inc. $51.60 3 2025
Source payment records
ELIQUIS
Normalized: eliquis
Drug PFIZER INC. $49.56 3 2025
Source payment records
OTEZLA
Normalized: otezla
Drug Amgen Inc. $48.51 3 2025
Source payment records
REPATHA
Normalized: repatha
Biological Amgen Inc. $48.51 3 2025
Source payment records
AREXVY
Normalized: arexvy
Biological GlaxoSmithKline, LLC. $47.21 3 2025
Source payment records
BOOSTRIX
Normalized: boostrix
Biological GlaxoSmithKline, LLC. $47.21 3 2025
Source payment records
SHINGRIX
Normalized: shingrix
Biological GlaxoSmithKline, LLC. $47.21 3 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $46.33 2 2025
Source payment records
The Cologuard Plus Collection Kit
Normalized: the cologuard plus collection kit
Device Exact Sciences Corporation $37.14 2 2025
Source payment records
ZAVZPRET
Normalized: zavzpret
Drug PFIZER INC. $37.00 2 2025
Source payment records
TRELEGY ELLIPTA
Normalized: trelegy ellipta
Drug GlaxoSmithKline, LLC. $36.81 2 2025
Source payment records
CAPVAXIVE
Normalized: capvaxive
Biological Merck Sharp & Dohme LLC $20.00 1 2025
Source payment records
GARDASIL 9
Normalized: gardasil 9
Biological Merck Sharp & Dohme LLC $20.00 1 2025
Source payment records
JOURNAVX
Normalized: journavx
Drug VERTEX PHARMACEUTICALS INCORPORATED $18.08 1 2025
Source payment records
LINZESS
Normalized: linzess
Drug ABBVIE INC. $16.71 1 2025
Source payment records
FREESTYLE LIBRE 3
Normalized: freestyle libre 3
Device Abbott Laboratories $16.28 1 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $15.96 1 2025
Source payment records
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $15.36 1 2025
Source payment records
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $15.27 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 95 exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 67
Beneficiary count suppressed
exact normalized Medicare Part D
TRELEGY ELLIPTA
trelegy ellipta
2025 Trelegy Ellipta 2024 15
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
74 15
Astellas Pharma US Inc
Exact reporting entity; no affiliate inference
2025 Myrbetriq
open payments reported associated product
CMS Open Payments — General Payments
16 supporting records · 16 recipient NPIs · example record 1238599014
Myrbetriq · 2024
Exact normalized brand match · 1 Part D row
21 suppressed by CMS
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 SYMBICORT
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 51 recipient NPIs · example record 1206132610
Symbicort · 2024
Exact normalized brand match · 1 Part D row
11 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
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
13 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
67 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
95 17
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
Amlodipine BesylateAmlodipine Besylate581153
Atorvastatin CalciumAtorvastatin Calcium443131
Levothyroxine SodiumLevothyroxine Sodium33681
OmeprazoleOmeprazole31289
AlprazolamAlprazolam28343
Losartan PotassiumLosartan Potassium27579
GabapentinGabapentin27482
LisinoprilLisinopril27174
Rosuvastatin CalciumRosuvastatin Calcium25975
Pravastatin SodiumPravastatin Sodium24163
Pantoprazole SodiumPantoprazole Sodium23867
Trazodone HclTrazodone Hcl21357
HydrochlorothiazideHydrochlorothiazide20160
FurosemideFurosemide19251
Metformin HclMetformin Hcl19060
Zolpidem TartrateZolpidem Tartrate17623
Cyclobenzaprine HclCyclobenzaprine Hcl17444
Potassium ChloridePotassium Chloride17249
ClonazepamClonazepam16822
MeloxicamMeloxicam15346
AllopurinolAllopurinol14732
Montelukast SodiumMontelukast Sodium14535
Tramadol HclTramadol Hcl13333
SimvastatinSimvastatin12832
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen12734
Sertraline HclSertraline Hcl12733
Fluticasone PropionateFluticasone Propionate11435
Doxycycline HyclateDoxycycline Hyclate10885
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav10778
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide10729
Tamsulosin HclTamsulosin Hcl10727
Metoprolol SuccinateMetoprolol Succinate10634
CarvedilolCarvedilol9832
GlimepirideGlimepiride9728
EliquisApixaban9517
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide9529
Metoprolol TartrateMetoprolol Tartrate9522
Escitalopram OxalateEscitalopram Oxalate9330
FamotidineFamotidine9026
ClopidogrelClopidogrel Bisulfate8726
Albuterol Sulfate HfaAlbuterol Sulfate8423
Alendronate SodiumAlendronate Sodium8416
SynthroidLevothyroxine Sodium7415
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid7324
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst7234
Olmesartan MedoxomilOlmesartan Medoxomil6918
OzempicSemaglutide67suppressed
CelecoxibCelecoxib6216
Metformin Hcl ErMetformin Hcl6218
Donepezil HclDonepezil Hcl5922
Triamcinolone AcetonideTriamcinolone Acetonide5922
AtenololAtenolol5613
PregabalinPregabalin5416
Meclizine HclMeclizine Hcl5223
Ciprofloxacin HclCiprofloxacin Hcl4941
Hydralazine HclHydralazine Hcl4711
Bupropion XlBupropion Hcl4614
XareltoRivaroxaban45suppressed
Duloxetine HclDuloxetine Hcl4313
Pioglitazone HclPioglitazone Hcl4312
Clonidine HclClonidine Hcl42suppressed
EzetimibeEzetimibe4213
Ondansetron OdtOndansetron4215
Fluoxetine HclFluoxetine Hcl41suppressed
GlipizideGlipizide41suppressed
MethylprednisoloneMethylprednisolone4132
Olmesartan-HydrochlorothiazideOlmesartan/Hydrochlorothiazide41suppressed
AzithromycinAzithromycin3934
Citalopram HbrCitalopram Hydrobromide3914
Diclofenac SodiumDiclofenac Sodium3912
EszopicloneEszopiclone38suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol38suppressed
ValacyclovirValacyclovir Hcl3816
FinasterideFinasteride37suppressed
JanuviaSitagliptin Phosphate37suppressed
SpironolactoneSpironolactone37suppressed
Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip3514
Venlafaxine Hcl ErVenlafaxine Hcl35suppressed
Benazepril HclBenazepril Hcl34suppressed
LorazepamLorazepam34suppressed
LevofloxacinLevofloxacin3324
Tizanidine HclTizanidine Hcl33suppressed
Memantine HclMemantine Hcl32suppressed
Paroxetine HclParoxetine Hcl31suppressed
Nifedipine ErNifedipine30suppressed
FluconazoleFluconazole2816
MupirocinMupirocin2818
Amitriptyline HclAmitriptyline Hcl27suppressed
MethocarbamolMethocarbamol26suppressed
Warfarin SodiumWarfarin Sodium26suppressed
Azelastine HclAzelastine Hcl25suppressed
DiazepamDiazepam25suppressed
Telmisartan-HydrochlorothiazidTelmisartan/Hydrochlorothiazid25suppressed
Glipizide ErGlipizide24suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen24suppressed
Vitamin D2Ergocalciferol (Vitamin D2)24suppressed
Buspirone HclBuspirone Hcl23suppressed
CefdinirCefdinir2319
Klor-Con M20Potassium Chloride23suppressed
Promethazine HclPromethazine Hcl23suppressed
Propranolol Hcl ErPropranolol Hcl23suppressed
NaproxenNaproxen22suppressed
Ondansetron HclOndansetron Hcl2213
SucralfateSucralfate22suppressed
MyrbetriqMirabegron21suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium20suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl20suppressed
Propranolol HclPropranolol Hcl20suppressed
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr19suppressed
Bupropion Hcl SrBupropion Hcl19suppressed
MetronidazoleMetronidazole1919
TelmisartanTelmisartan19suppressed
ValsartanValsartan19suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine17suppressed
Oxybutynin Chloride ErOxybutynin Chloride17suppressed
Dropsafe Prep PadsAlcohol Antiseptic Pads16suppressed
EstradiolEstradiol16suppressed
FenofibrateFenofibrate Nanocrystallized16suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog16suppressed
AmoxicillinAmoxicillin15suppressed
AripiprazoleAripiprazole15suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl15suppressed
RamiprilRamipril15suppressed
Ropinirole HclRopinirole Hcl15suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter15suppressed
Enalapril MaleateEnalapril Maleate14suppressed
Terbinafine HclTerbinafine Hcl14suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide14suppressed
Dicyclomine HclDicyclomine Hcl13suppressed
FenofibrateFenofibrate13suppressed
JardianceEmpagliflozin13suppressed
LatanoprostLatanoprost13suppressed
Sildenafil CitrateSildenafil Citrate13suppressed
Tramadol Hcl-AcetaminophenTramadol Hcl/Acetaminophen13suppressed
BaclofenBaclofen12suppressed
ColchicineColchicine12suppressed
Enalapril-HydrochlorothiazideEnalapril/Hydrochlorothiazide12suppressed
Glyburide-Metformin HclGlyburide/Metformin Hcl12suppressed
Oxybutynin ChlorideOxybutynin Chloride12suppressed
Verapamil ErVerapamil Hcl12suppressed
Doxazosin MesylateDoxazosin Mesylate11suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate11suppressed
LansoprazoleLansoprazole11suppressed
Levocetirizine DihydrochlorideLevocetirizine Dihydrochloride11suppressed
LovastatinLovastatin11suppressed
PaxlovidNirmatrelvir/Ritonavir1111
Ranolazine ErRanolazine11suppressed
SymbicortBudesonide/Formoterol Fumarate11suppressed

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 $1,378.59 · 72 records AstraZeneca Pharmaceuticals LP AIRSUPRA, AREXVY, Auvelity, BOOSTRIX, BREZTRI, CAPLYTA, CAPVAXIVE, Cologuard Collection Kit, ELIQUIS, FREESTYLE LIBRE 3, GARDASIL 9, GEMTESA, JOURNAVX, LINZESS, MOUNJARO, NURTEC ODT, OTEZLA, Ozempic, REPATHA, Rybelsus, SHINGRIX, TRELEGY ELLIPTA, The Cologuard Plus Collection Kit, UBRELVY, VRAYLAR, Veozah, Wegovy, ZAVZPRET, ZEPBOUND 8
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