Healthcare provider profile · identity verified

William John Pierce, MD

Allopathic & Osteopathic Physicians|Family Medicine · MERRILLVILLE, IN · NPI 1497838593

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 John Pierce, MD received $77.61 in general payments during 2025 across 4 reported records.

Exact Sciences Corporation accounted for 51.8% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 5 associated products.

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

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 23 claims for Eliquis by this doctor in 2024.

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

Payment overview · 2025

General Payments

$77.61

4 reported records · 3 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
Exact Sciences Corporation Unresolved — no canonical attribution shown $40.2051.8%22025
PFIZER INC. Unresolved — no canonical attribution shown $19.9025.6%12025
Aimmune Therapeutics, Inc. Unresolved — no canonical attribution shown $17.5122.6%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$77.614

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
Cologuard Collection Kit
Normalized: cologuard collection kit
Device Exact Sciences Corporation $21.10 1 2025
Source payment records
ELIQUIS
Normalized: eliquis
Drug PFIZER INC. $19.90 1 2025
Source payment records
NURTEC ODT
Normalized: nurtec odt
Drug PFIZER INC. $19.90 1 2025
Source payment records
The Cologuard Plus Collection Kit
Normalized: the cologuard plus collection kit
Device Exact Sciences Corporation $19.10 1 2025
Source payment records
ZENPEP
Normalized: zenpep
Drug Aimmune Therapeutics, Inc. $17.51 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 23
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
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
23 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/Acetaminophen31151
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen24937
AlprazolamAlprazolam21634
Levothyroxine SodiumLevothyroxine Sodium18550
GabapentinGabapentin11627
Metoprolol SuccinateMetoprolol Succinate10133
Amlodipine BesylateAmlodipine Besylate9428
FurosemideFurosemide8927
Atorvastatin CalciumAtorvastatin Calcium8226
DiazepamDiazepam8213
Tramadol HclTramadol Hcl8115
Potassium ChloridePotassium Chloride7425
Pantoprazole SodiumPantoprazole Sodium7122
Tamsulosin HclTamsulosin Hcl6819
Rosuvastatin CalciumRosuvastatin Calcium6522
LisinoprilLisinopril6221
Tizanidine HclTizanidine Hcl6117
Sertraline HclSertraline Hcl5916
LorazepamLorazepam5816
Oxycodone HclOxycodone Hcl58suppressed
OmeprazoleOmeprazole5214
ClopidogrelClopidogrel Bisulfate5015
Trazodone HclTrazodone Hcl4714
Albuterol Sulfate HfaAlbuterol Sulfate4618
Clonidine HclClonidine Hcl4513
Metformin HclMetformin Hcl4511
ValsartanValsartan4520
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid4114
Zolpidem TartrateZolpidem Tartrate41suppressed
Meclizine HclMeclizine Hcl4017
Memantine HclMemantine Hcl39suppressed
PregabalinPregabalin3811
Duloxetine HclDuloxetine Hcl37suppressed
Metoprolol TartrateMetoprolol Tartrate3716
CarvedilolCarvedilol3513
TemazepamTemazepam35suppressed
AllopurinolAllopurinol33suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine32suppressed
FamotidineFamotidine3212
AtenololAtenolol31suppressed
AzithromycinAzithromycin3129
Fluoxetine HclFluoxetine Hcl31suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate31suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog31suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide30suppressed
Zolpidem Tartrate ErZolpidem Tartrate30suppressed
Acetaminophen-CodeineAcetaminophen With Codeine29suppressed
Morphine Sulfate ErMorphine Sulfate29suppressed
SimvastatinSimvastatin28suppressed
Diclofenac SodiumDiclofenac Sodium2712
MeloxicamMeloxicam27suppressed
Donepezil HclDonepezil Hcl26suppressed
Cyclobenzaprine HclCyclobenzaprine Hcl25suppressed
Doxycycline MonohydrateDoxycycline Monohydrate2412
OxycontinOxycodone Hcl24suppressed
Prochlorperazine MaleateProchlorperazine Maleate24suppressed
EliquisApixaban23suppressed
Enalapril MaleateEnalapril Maleate23suppressed
Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip2211
Ropinirole HclRopinirole Hcl22suppressed
CelecoxibCelecoxib21suppressed
HydrochlorothiazideHydrochlorothiazide21suppressed
Ciprofloxacin HclCiprofloxacin Hcl2017
IbuprofenIbuprofen20suppressed
OzempicSemaglutide20suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim2013
Butalbital-Acetaminophen-CaffeButalb/Acetaminophen/Caffeine19suppressed
ClonazepamClonazepam19suppressed
Dicyclomine HclDicyclomine Hcl19suppressed
Paroxetine HclParoxetine Hcl19suppressed
XareltoRivaroxaban19suppressed
AmoxicillinAmoxicillin1813
Ondansetron OdtOndansetron18suppressed
SynthroidLevothyroxine Sodium18suppressed
Bupropion XlBupropion Hcl17suppressed
Buspirone HclBuspirone Hcl17suppressed
Terazosin HclTerazosin Hcl17suppressed
Losartan PotassiumLosartan Potassium16suppressed
Montelukast SodiumMontelukast Sodium16suppressed
Fluticasone PropionateFluticasone Propionate15suppressed
Folic AcidFolic Acid15suppressed
MethylprednisoloneMethylprednisolone1513
Morphine SulfateMorphine Sulfate15suppressed
NaproxenNaproxen15suppressed
NitroglycerinNitroglycerin15suppressed
CarisoprodolCarisoprodol14suppressed
Escitalopram OxalateEscitalopram Oxalate14suppressed
GlimepirideGlimepiride14suppressed
Ondansetron HclOndansetron Hcl14suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine13suppressed
Klor-Con M20Potassium Chloride13suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl13suppressed
Venlafaxine Hcl ErVenlafaxine Hcl13suppressed
Klor-Con M10Potassium Chloride12suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter12suppressed
Calcitonin-SalmonCalcitonin,salmon,synthetic11suppressed
DigoxinDigoxin11suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol11suppressed
GlipizideGlipizide11suppressed
Pioglitazone HclPioglitazone Hcl11suppressed
Sumatriptan SuccinateSumatriptan Succinate11suppressed
TrulicityDulaglutide11suppressed
Ventolin HfaAlbuterol Sulfate11suppressed
Warfarin SodiumWarfarin Sodium11suppressed

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 $77.61 · 4 records Exact Sciences Corporation Cologuard Collection Kit, ELIQUIS, NURTEC ODT, The Cologuard Plus Collection Kit, ZENPEP 1
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