Healthcare provider profile · identity verified

David C Walker, DO

Allopathic & Osteopathic Physicians|Internal Medicine · SHERIDAN, WY · NPI 1639142508

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 David C Walker, DO received $664.82 in general payments during 2025 across 34 reported records.

AstraZeneca Pharmaceuticals LP accounted for 29.7% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 16 associated products.

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

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 24 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 FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 60 claims for Farxiga 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 25 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 61 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 33 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 62 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 21 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 100 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 15 claims for Rybelsus by this doctor in 2024.

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

Payment overview · 2025

General Payments

$664.82

34 reported records · 9 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 $197.4529.7%102025
Lilly USA, LLC Unresolved — no canonical attribution shown $144.9721.8%102025
Insmed, Inc. Unresolved — no canonical attribution shown $83.0512.5%32025
Novo Nordisk Inc Unresolved — no canonical attribution shown $77.7611.7%42025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $67.8210.2%32025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $26.624.0%12025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $25.153.8%12025
IBSA Pharma Inc. Unresolved — no canonical attribution shown $23.703.6%12025
Amgen Inc. Unresolved — no canonical attribution shown $18.302.8%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$664.8234

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
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $144.97 10 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $144.97 10 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $120.14 6 2025
Source payment records
Arikayce
Normalized: arikayce
Drug Insmed, Inc. $83.05 3 2025
Source payment records
TRELEGY ELLIPTA
Normalized: trelegy ellipta
Drug GlaxoSmithKline, LLC. $67.82 3 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $64.57 2 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $39.99 2 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $26.62 1 2025
Source payment records
Brinsupri
Normalized: brinsupri
Drug Insmed, Inc. $25.57 1 2025
Source payment records
Veozah
Normalized: veozah
Drug Astellas Pharma US Inc $25.15 1 2025
Source payment records
Flector
Normalized: flector
Drug IBSA Pharma Inc. $23.70 1 2025
Source payment records
Licart
Normalized: licart
Drug IBSA Pharma Inc. $23.70 1 2025
Source payment records
Tirosint
Normalized: tirosint
Drug IBSA Pharma Inc. $23.70 1 2025
Source payment records
EVENITY
Normalized: evenity
Biological Amgen Inc. $18.30 1 2025
Source payment records
PROLIA
Normalized: prolia
Biological Amgen Inc. $18.30 1 2025
Source payment records
FARXIGA
Normalized: farxiga
Drug AstraZeneca Pharmaceuticals LP $15.64 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 60 exact normalized Medicare Part D
MOUNJARO
mounjaro
2025 Mounjaro 2024 62
Beneficiary count suppressed
exact normalized Medicare Part D
TRELEGY ELLIPTA
trelegy ellipta
2025 Trelegy Ellipta 2024 61 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
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
24 suppressed by CMS
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
60 14
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
25 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
61 17
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
33 suppressed by CMS
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
62 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
21 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
100 15
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
15 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
Levothyroxine SodiumLevothyroxine Sodium701166
Pantoprazole SodiumPantoprazole Sodium427126
Amlodipine BesylateAmlodipine Besylate358106
Rosuvastatin CalciumRosuvastatin Calcium344103
Losartan PotassiumLosartan Potassium32195
FurosemideFurosemide31358
Atorvastatin CalciumAtorvastatin Calcium30883
EliquisApixaban28859
Potassium ChloridePotassium Chloride25667
OmeprazoleOmeprazole25360
Metoprolol SuccinateMetoprolol Succinate23270
Quetiapine FumarateQuetiapine Fumarate20823
GabapentinGabapentin20752
Escitalopram OxalateEscitalopram Oxalate20652
Metformin HclMetformin Hcl20159
LisinoprilLisinopril18951
Tamsulosin HclTamsulosin Hcl17949
Trazodone HclTrazodone Hcl17250
Sertraline HclSertraline Hcl16138
Montelukast SodiumMontelukast Sodium15143
SpironolactoneSpironolactone12932
AllopurinolAllopurinol12735
Fluticasone PropionateFluticasone Propionate12648
SimvastatinSimvastatin12638
PregabalinPregabalin12231
FinasterideFinasteride12138
OzempicSemaglutide10015
CelecoxibCelecoxib9834
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide9630
Donepezil HclDonepezil Hcl9520
HydrochlorothiazideHydrochlorothiazide9533
Buspirone HclBuspirone Hcl9120
Zolpidem TartrateZolpidem Tartrate8623
ClopidogrelClopidogrel Bisulfate8226
Albuterol Sulfate HfaAlbuterol Sulfate8133
Citalopram HbrCitalopram Hydrobromide7818
FamotidineFamotidine7519
CarvedilolCarvedilol7420
Duloxetine HclDuloxetine Hcl7319
AtenololAtenolol7016
Metoprolol TartrateMetoprolol Tartrate7019
Tramadol HclTramadol Hcl6919
LorazepamLorazepam6825
Ropinirole HclRopinirole Hcl6817
Bupropion XlBupropion Hcl6318
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen6218
MounjaroTirzepatide62suppressed
SynthroidLevothyroxine Sodium6219
Trelegy ElliptaFluticasone/Umeclidin/Vilanter6117
FarxigaDapagliflozin Propanediol6014
AzithromycinAzithromycin5845
Metformin Hcl ErMetformin Hcl5216
AripiprazoleAripiprazole49suppressed
Pravastatin SodiumPravastatin Sodium4717
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide4613
CephalexinCephalexin4323
XareltoRivaroxaban43suppressed
Oxycodone HclOxycodone Hcl42suppressed
EstradiolEstradiol4115
MethylprednisoloneMethylprednisolone4135
PrednisonePrednisone4112
JanuviaSitagliptin Phosphate40suppressed
Memantine HclMemantine Hcl38suppressed
Diclofenac SodiumDiclofenac Sodium3717
DutasterideDutasteride37suppressed
Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl3636
Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl3636
Pioglitazone HclPioglitazone Hcl3514
ValsartanValsartan35suppressed
ClonazepamClonazepam3411
EzetimibeEzetimibe34suppressed
Propranolol HclPropranolol Hcl34suppressed
SucralfateSucralfate3413
Fluticasone-SalmeterolFluticasone Propion/Salmeterol33suppressed
JardianceEmpagliflozin33suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog33suppressed
MeloxicamMeloxicam32suppressed
MirtazapineMirtazapine32suppressed
Tresiba Flextouch U-200Insulin Degludec32suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl31suppressed
ValacyclovirValacyclovir Hcl3014
GlimepirideGlimepiride29suppressed
LevetiracetamLevetiracetam29suppressed
Morphine SulfateMorphine Sulfate29suppressed
Warfarin SodiumWarfarin Sodium29suppressed
Ciprofloxacin HclCiprofloxacin Hcl2814
Cyclobenzaprine HclCyclobenzaprine Hcl2812
Hydroxyzine HclHydroxyzine Hcl28suppressed
LacosamideLacosamide28suppressed
Paroxetine HclParoxetine Hcl28suppressed
RisperidoneRisperidone28suppressed
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen27suppressed
Memantine Hcl ErMemantine Hcl26suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog25suppressed
Carbidopa-LevodopaCarbidopa/Levodopa25suppressed
Olmesartan-HydrochlorothiazideOlmesartan/Hydrochlorothiazide25suppressed
Oxybutynin Chloride ErOxybutynin Chloride25suppressed
SymbicortBudesonide/Formoterol Fumarate25suppressed
MyrbetriqMirabegron24suppressed
Breo ElliptaFluticasone/Vilanterol23suppressed
Xigduo XrDapaglifloz Propaned/Metformin23suppressed
Doxepin HclDoxepin Hcl22suppressed
Fluoxetine HclFluoxetine Hcl22suppressed
IbuprofenIbuprofen22suppressed
Alendronate SodiumAlendronate Sodium21suppressed
LamotrigineLamotrigine21suppressed
OlanzapineOlanzapine21suppressed
Olmesartan MedoxomilOlmesartan Medoxomil21suppressed
TrulicityDulaglutide21suppressed
Tolterodine TartrateTolterodine Tartrate20suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide20suppressed
Soliqua 100-33Insulin Glargine/Lixisenatide19suppressed
Ultra-Fine Nano Pen NeedlePen Needle, Diabetic19suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1815
ClotrimazoleClotrimazole18suppressed
OxycontinOxycodone Hcl18suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim18suppressed
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid18suppressed
Ipratropium-AlbuterolIpratropium/Albuterol Sulfate17suppressed
NitrofurantoinNitrofurantoin Macrocrystal17suppressed
Spiriva HandihalerTiotropium Bromide17suppressed
Amitriptyline HclAmitriptyline Hcl16suppressed
Breztri AerosphereBudesonide/Glycopyr/Formoterol16suppressed
EszopicloneEszopiclone16suppressed
Ondansetron OdtOndansetron16suppressed
LatanoprostLatanoprost15suppressed
Midodrine HclMidodrine Hcl15suppressed
RybelsusSemaglutide15suppressed
TorsemideTorsemide15suppressed
DexamethasoneDexamethasone14suppressed
Doxazosin MesylateDoxazosin Mesylate14suppressed
Enalapril MaleateEnalapril Maleate14suppressed
FenofibrateFenofibrate Nanocrystallized14suppressed
Ipratropium BromideIpratropium Bromide14suppressed
Tresiba Flextouch U-100Insulin Degludec14suppressed
Desipramine HclDesipramine Hcl13suppressed
Dexlansoprazole DrDexlansoprazole13suppressed
HaloperidolHaloperidol13suppressed
LevofloxacinLevofloxacin1311
Prazosin HclPrazosin Hcl13suppressed
PrimidonePrimidone13suppressed
Triamcinolone AcetonideTriamcinolone Acetonide13suppressed
Armour ThyroidThyroid,pork12suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate12suppressed
Fenofibric AcidFenofibric Acid (Choline)12suppressed
LansoprazoleLansoprazole12suppressed
Valproic AcidValproic Acid (As Sodium Salt)12suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine11suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium11suppressed
LoperamideLoperamide Hcl11suppressed
Terazosin HclTerazosin Hcl11suppressed
Venlafaxine Hcl ErVenlafaxine Hcl11suppressed

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 $664.82 · 34 records AstraZeneca Pharmaceuticals LP AIRSUPRA, Arikayce, BREZTRI, Brinsupri, CAPLYTA, EVENITY, FARXIGA, Flector, Licart, MOUNJARO, PROLIA, TRELEGY ELLIPTA, Tirosint, Veozah, Wegovy, ZEPBOUND 9
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