Healthcare provider profile · identity verified

William Mark Haynes, M.D.

Allopathic & Osteopathic Physicians|Family Medicine · HOMER, LA · NPI 1184735151

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 Mark Haynes, M.D. received $385.86 in general payments during 2025 across 11 reported records.

Ardelyx, Inc. accounted for 32.4% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 7 associated products.

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 100 claims for Eliquis 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 NUEDEXTA as an associated drug or biological on 393 records involving 285 distinct recipient NPIs. Public Medicare Part D data also shows 18 claims for Nuedexta by this doctor in 2024.

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

Payment overview · 2025

General Payments

$385.86

11 reported records · 7 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
Ardelyx, Inc. Unresolved — no canonical attribution shown $125.0032.4%12025
Alpha Cognition USA, Inc. Unresolved — no canonical attribution shown $75.4819.6%12025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $59.7415.5%32025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $46.3112.0%22025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $35.359.2%22025
Neurocrine BioSciences, Inc. Unresolved — no canonical attribution shown $25.866.7%12025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $18.124.7%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$385.8611

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
IBSRELA
Normalized: ibsrela
Drug Ardelyx, Inc. $125.00 1 2025
Source payment records
Zunveyl
Normalized: zunveyl
Drug Alpha Cognition USA, Inc. $75.48 1 2025
Source payment records
Auvelity
Normalized: auvelity
Drug Axsome Therapeutics, Inc. $59.74 3 2025
Source payment records
REXULTI
Normalized: rexulti
Drug Otsuka America Pharmaceutical, Inc. $46.31 2 2025
Source payment records
Kerendia
Normalized: kerendia
Drug Bayer Healthcare Pharmaceuticals Inc. $35.35 2 2025
Source payment records
INGREZZA
Normalized: ingrezza
Drug Neurocrine BioSciences, Inc. $25.86 1 2025
Source payment records
COBENFY
Normalized: cobenfy
Drug E.R. Squibb & Sons, L.L.C. $18.12 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

No exact normalized or approved-alias overlap was found in the loaded Part D year. This does not mean the doctor never prescribed the product.

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
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
100 19
Otsuka America Pharmaceutical, Inc.
Exact reporting entity; no affiliate inference
2025 NUEDEXTA
open payments reported associated product
CMS Open Payments — General Payments
393 supporting records · 285 recipient NPIs · example record 1227268901
Nuedexta · 2024
Exact normalized brand match · 1 Part D row
18 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
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen1011129
Atorvastatin CalciumAtorvastatin Calcium565114
Losartan PotassiumLosartan Potassium34377
AlprazolamAlprazolam32044
GabapentinGabapentin31256
Amlodipine BesylateAmlodipine Besylate29770
Levothyroxine SodiumLevothyroxine Sodium24947
Pantoprazole SodiumPantoprazole Sodium23255
FurosemideFurosemide22045
OmeprazoleOmeprazole18738
HydrochlorothiazideHydrochlorothiazide17745
Potassium ChloridePotassium Chloride17539
Duloxetine HclDuloxetine Hcl15027
PregabalinPregabalin14828
LisinoprilLisinopril14130
MeloxicamMeloxicam13524
Metformin HclMetformin Hcl12531
Tamsulosin HclTamsulosin Hcl12433
Zolpidem TartrateZolpidem Tartrate12417
DiazepamDiazepam12018
Rosuvastatin CalciumRosuvastatin Calcium11934
AtenololAtenolol11327
Metoprolol SuccinateMetoprolol Succinate11024
CarvedilolCarvedilol10826
EliquisApixaban10019
ClonazepamClonazepam9814
SimvastatinSimvastatin9822
Albuterol Sulfate HfaAlbuterol Sulfate9525
Tizanidine HclTizanidine Hcl9215
Donepezil HclDonepezil Hcl9113
Metoprolol TartrateMetoprolol Tartrate9016
Hydralazine HclHydralazine Hcl8916
CelecoxibCelecoxib8216
Tramadol HclTramadol Hcl7514
ClopidogrelClopidogrel Bisulfate7317
Sertraline HclSertraline Hcl7013
Cyclobenzaprine HclCyclobenzaprine Hcl6914
Escitalopram OxalateEscitalopram Oxalate6712
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide67suppressed
AllopurinolAllopurinol6515
Montelukast SodiumMontelukast Sodium6316
Trazodone HclTrazodone Hcl6313
Cyproheptadine HclCyproheptadine Hcl5912
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen58suppressed
MethylprednisoloneMethylprednisolone5444
JanuviaSitagliptin Phosphate51suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide51suppressed
SpironolactoneSpironolactone49suppressed
Venlafaxine Hcl ErVenlafaxine Hcl4711
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav4537
OzempicSemaglutide45suppressed
FluconazoleFluconazole4322
Levocetirizine DihydrochlorideLevocetirizine Dihydrochloride4311
Oxybutynin Chloride ErOxybutynin Chloride43suppressed
MupirocinMupirocin4223
Quetiapine FumarateQuetiapine Fumarate41suppressed
BumetanideBumetanide40suppressed
LorazepamLorazepam40suppressed
EzetimibeEzetimibe39suppressed
Clonidine HclClonidine Hcl3811
FinasterideFinasteride38suppressed
Fluoxetine HclFluoxetine Hcl38suppressed
LevofloxacinLevofloxacin3831
LinzessLinaclotide38suppressed
Dexlansoprazole DrDexlansoprazole34suppressed
FamotidineFamotidine34suppressed
FentanylFentanyl34suppressed
Warfarin SodiumWarfarin Sodium34suppressed
Acetaminophen-CodeineAcetaminophen With Codeine33suppressed
Ondansetron HclOndansetron Hcl33suppressed
XareltoRivaroxaban33suppressed
Amitriptyline HclAmitriptyline Hcl32suppressed
AzithromycinAzithromycin3231
Memantine HclMemantine Hcl32suppressed
Metformin Hcl ErMetformin Hcl31suppressed
MyrbetriqMirabegron31suppressed
Paroxetine HclParoxetine Hcl31suppressed
Triamcinolone AcetonideTriamcinolone Acetonide3117
Terbinafine HclTerbinafine Hcl3012
Dicyclomine HclDicyclomine Hcl29suppressed
MethocarbamolMethocarbamol29suppressed
Ondansetron OdtOndansetron2918
Citalopram HbrCitalopram Hydrobromide28suppressed
Fluticasone PropionateFluticasone Propionate2816
Hydroxyzine HclHydroxyzine Hcl2811
Alendronate SodiumAlendronate Sodium27suppressed
EntrestoSacubitril/Valsartan27suppressed
Nebivolol HclNebivolol Hcl27suppressed
PrednisonePrednisone2719
Solifenacin SuccinateSolifenacin Succinate27suppressed
Bupropion XlBupropion Hcl26suppressed
ColchicineColchicine26suppressed
DigoxinDigoxin26suppressed
IrbesartanIrbesartan26suppressed
Methadone HclMethadone Hcl26suppressed
Amiodarone HclAmiodarone Hcl25suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine2514
FenofibrateFenofibrate25suppressed
JardianceEmpagliflozin24suppressed
Penicillin V PotassiumPenicillin V Potassium24suppressed
Doxycycline HyclateDoxycycline Hyclate2317
Isosorbide Mononitrate ErIsosorbide Mononitrate23suppressed
Minocycline HclMinocycline Hcl2311
Nifedipine ErNifedipine23suppressed
TemazepamTemazepam23suppressed
Betamethasone DipropionateBetamethasone Dipropionate22suppressed
Diclofenac SodiumDiclofenac Sodium22suppressed
LansoprazoleLansoprazole22suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog22suppressed
FenofibrateFenofibrate Nanocrystallized21suppressed
Morphine Sulfate ErMorphine Sulfate21suppressed
Buspirone HclBuspirone Hcl20suppressed
Divalproex Sodium ErDivalproex Sodium20suppressed
Olmesartan MedoxomilOlmesartan Medoxomil20suppressed
TelmisartanTelmisartan20suppressed
BaclofenBaclofen19suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate19suppressed
EstradiolEstradiol19suppressed
Propranolol HclPropranolol Hcl19suppressed
ValsartanValsartan19suppressed
NuedextaDextromethorphan Hbr/Quinidine18suppressed
Phenytoin Sodium ExtendedPhenytoin Sodium Extended18suppressed
TopiramateTopiramate18suppressed
SucralfateSucralfate1712
SulindacSulindac17suppressed
Verapamil ErVerapamil Hcl17suppressed
FenofibrateFenofibrate,micronized16suppressed
Midodrine HclMidodrine Hcl16suppressed
Nystatin-TriamcinoloneNystatin/Triamcinolone Acet16suppressed
Tresiba Flextouch U-100Insulin Degludec16suppressed
VascepaIcosapent Ethyl16suppressed
Ventolin HfaAlbuterol Sulfate16suppressed
GemfibrozilGemfibrozil15suppressed
GemtesaVibegron15suppressed
LatanoprostLatanoprost15suppressed
LevetiracetamLevetiracetam15suppressed
Mometasone FuroateMometasone Furoate15suppressed
Butalbital-Acetaminophen-CaffeButalb/Acetaminophen/Caffeine14suppressed
ChlorthalidoneChlorthalidone14suppressed
EtodolacEtodolac14suppressed
GlimepirideGlimepiride14suppressed
NystatinNystatin1411
FarxigaDapagliflozin Propanediol13suppressed
Ketorolac TromethamineKetorolac Tromethamine1311
LantusInsulin Glargine,hum.Rec.Anlog13suppressed
Meclizine HclMeclizine Hcl13suppressed
Morphine SulfateMorphine Sulfate13suppressed
NaproxenNaproxen13suppressed
Ropinirole HclRopinirole Hcl13suppressed
ValacyclovirValacyclovir Hcl13suppressed
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog12suppressed
Ciprofloxacin HclCiprofloxacin Hcl12suppressed
ClarithromycinClarithromycin1211
Divalproex SodiumDivalproex Sodium12suppressed
GlipizideGlipizide12suppressed
KetoconazoleKetoconazole12suppressed
Methylphenidate HclMethylphenidate Hcl12suppressed
Metoclopramide HclMetoclopramide Hcl12suppressed
MounjaroTirzepatide12suppressed
NitroglycerinNitroglycerin12suppressed
Pioglitazone HclPioglitazone Hcl12suppressed
Potassium Citrate ErPotassium Citrate12suppressed
AdmelogInsulin Lispro11suppressed
Azelastine HclAzelastine Hcl11suppressed
Breztri AerosphereBudesonide/Glycopyr/Formoterol11suppressed
ChlorzoxazoneChlorzoxazone11suppressed
IbuprofenIbuprofen11suppressed
Megestrol AcetateMegestrol Acetate11suppressed
MirtazapineMirtazapine11suppressed
NitrofurantoinNitrofurantoin Macrocrystal11suppressed
Repatha SyringeEvolocumab11suppressed

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 $385.86 · 11 records Ardelyx, Inc. Auvelity, COBENFY, IBSRELA, INGREZZA, Kerendia, REXULTI, Zunveyl 2
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