Healthcare provider profile · identity verified

William Mason Hamilton, ADVANCED PRACTICE NP

Physician Assistants & Advanced Practice Nursing Providers|Nurse Practitioner|Psychiatric/Mental Health · ROME, GA · NPI 1447014675

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 Mason Hamilton, ADVANCED PRACTICE NP received $739.72 in general payments during 2025 across 47 reported records.

Teva Pharmaceuticals USA, Inc. accounted for 44.1% of that reported general-payment amount.

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

A separate comparison found the same explicitly named product in public Medicare Part D data: Austedo Xr, Invega Sustenna, Vraylar.

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 VRAYLAR as an associated drug or biological on 377741 records involving 62704 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Vraylar by this doctor in 2024.

Janssen Pharmaceuticals, 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 INVEGA SUSTENNA as an associated drug or biological on 39068 records involving 11966 distinct recipient NPIs. Public Medicare Part D data also shows 25 claims for Invega Sustenna by this doctor in 2024.

Teva Pharmaceuticals USA, 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 AUSTEDO XR as an associated drug or biological on 86263 records involving 23643 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Austedo Xr by this doctor in 2024.

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

Payment overview · 2025

General Payments

$739.72

47 reported records · 5 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
Teva Pharmaceuticals USA, Inc. Unresolved — no canonical attribution shown $326.4944.1%212025
ABBVIE INC. Unresolved — no canonical attribution shown $255.0934.5%202025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $56.517.6%22025
Janssen Pharmaceuticals, Inc Unresolved — no canonical attribution shown $53.987.3%22025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $47.656.4%22025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$739.7247

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
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $255.09 20 2025
Source payment records
UZEDY
Normalized: uzedy
Drug Teva Pharmaceuticals USA, Inc. $237.84 18 2025
Source payment records
AUSTEDO XR
Normalized: austedo xr
Drug Teva Pharmaceuticals USA, Inc. $88.65 3 2025
Source payment records
COBENFY
Normalized: cobenfy
Drug E.R. Squibb & Sons, L.L.C. $56.51 2 2025
Source payment records
INVEGA SUSTENNA
Normalized: invega sustenna
Drug Janssen Pharmaceuticals, Inc $53.98 2 2025
Source payment records
INVEGA TRINZA
Normalized: invega trinza
Drug Janssen Pharmaceuticals, Inc $53.98 2 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $47.65 2 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
AUSTEDO XR
austedo xr
2025 Austedo Xr 2024 12
Beneficiary count suppressed
exact normalized Medicare Part D
INVEGA SUSTENNA
invega sustenna
2025 Invega Sustenna 2024 25 exact normalized Medicare Part D
VRAYLAR
vraylar
2025 Vraylar 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 VRAYLAR
open payments reported associated product
CMS Open Payments — General Payments
377741 supporting records · 62704 recipient NPIs · example record 1201352550
Vraylar · 2024
Exact normalized brand match · 1 Part D row
15 suppressed by CMS
Janssen Pharmaceuticals, Inc
Exact reporting entity; no affiliate inference
2025 INVEGA SUSTENNA
open payments reported associated product
CMS Open Payments — General Payments
39068 supporting records · 11966 recipient NPIs · example record 1174223262
Invega Sustenna · 2024
Exact normalized brand match · 1 Part D row
25 11
Teva Pharmaceuticals USA, Inc.
Exact reporting entity; no affiliate inference
2025 AUSTEDO XR
open payments reported associated product
CMS Open Payments — General Payments
86263 supporting records · 23643 recipient NPIs · example record 1247244228
Austedo Xr · 2024
Exact normalized brand match · 1 Part D row
12 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
Benztropine MesylateBenztropine Mesylate8229
LamotrigineLamotrigine7224
Trazodone HclTrazodone Hcl6322
Quetiapine FumarateQuetiapine Fumarate5818
RisperidoneRisperidone5815
Buspirone HclBuspirone Hcl5221
AripiprazoleAripiprazole4815
OlanzapineOlanzapine3716
Fluoxetine HclFluoxetine Hcl3512
Divalproex SodiumDivalproex Sodium3313
Bupropion XlBupropion Hcl3013
Clonidine HclClonidine Hcl26suppressed
Invega SustennaPaliperidone Palmitate2511
Sertraline HclSertraline Hcl2511
Venlafaxine Hcl ErVenlafaxine Hcl24suppressed
Duloxetine HclDuloxetine Hcl21suppressed
Prazosin HclPrazosin Hcl21suppressed
Hydroxyzine PamoateHydroxyzine Pamoate1811
GabapentinGabapentin17suppressed
Bupropion Hcl SrBupropion Hcl15suppressed
Divalproex Sodium ErDivalproex Sodium15suppressed
OxcarbazepineOxcarbazepine15suppressed
VraylarCariprazine Hcl15suppressed
Austedo XrDeutetrabenazine12suppressed
Citalopram HbrCitalopram Hydrobromide12suppressed
CarbamazepineCarbamazepine11suppressed

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 $739.72 · 47 records Teva Pharmaceuticals USA, Inc. AUSTEDO XR, CAPLYTA, COBENFY, INVEGA SUSTENNA, INVEGA TRINZA, UZEDY, VRAYLAR 3
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