Healthcare provider profile · identity verified

Michael Darrell Stewart, PA-C

Physician Assistants & Advanced Practice Nursing Providers|Physician Assistant · DETROIT, MI · NPI 1154604205

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 Michael Darrell Stewart, PA-C received $3,428.83 in general payments during 2025 across 105 reported records.

Otsuka America Pharmaceutical, Inc. accounted for 20.6% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 18 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Abilify Asimtufii, Abilify Maintena, Aristada, Caplyta, Fanapt, Invega Sustenna, Lybalvi, Rexulti, Uzedy, 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 81 claims for Vraylar by this doctor in 2024.

Alkermes, 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 ARISTADA as an associated drug or biological on 76041 records involving 17486 distinct recipient NPIs. Public Medicare Part D data also shows 28 claims for Aristada by this doctor in 2024.

Alkermes, 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 LYBALVI as an associated drug or biological on 93784 records involving 20135 distinct recipient NPIs. Public Medicare Part D data also shows 26 claims for Lybalvi by this doctor in 2024.

ITI, Inc. (d/b/a Intra-Cellular Therapies, 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 CAPLYTA as an associated drug or biological on 211855 records involving 46143 distinct recipient NPIs. Public Medicare Part D data also shows 54 claims for Caplyta 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 Caplyta as an associated drug or biological on 11 records involving 9 distinct recipient NPIs. Public Medicare Part D data also shows 54 claims for Caplyta 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 145 claims for Invega Sustenna 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 TRINZA as an associated drug or biological on 8191 records involving 2146 distinct recipient NPIs. Public Medicare Part D data also shows 29 claims for Invega Trinza by this doctor in 2024.

Lundbeck 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 ABILIFY ASIMTUFII as an associated drug or biological on 4974 records involving 1745 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Abilify Asimtufii by this doctor in 2024.

Lundbeck 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 ABILIFY MAINTENA as an associated drug or biological on 2902 records involving 986 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Abilify Maintena by this doctor in 2024.

Lundbeck 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 REXULTI as an associated drug or biological on 71829 records involving 25812 distinct recipient NPIs. Public Medicare Part D data also shows 89 claims for Rexulti 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 ABILIFY ASIMTUFII as an associated drug or biological on 37017 records involving 12446 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Abilify Asimtufii 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 ABILIFY MAINTENA as an associated drug or biological on 27924 records involving 10497 distinct recipient NPIs. Public Medicare Part D data also shows 21 claims for Abilify Maintena 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 REXULTI as an associated drug or biological on 160756 records involving 46288 distinct recipient NPIs. Public Medicare Part D data also shows 89 claims for Rexulti 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 UZEDY as an associated drug or biological on 46702 records involving 13355 distinct recipient NPIs. Public Medicare Part D data also shows 15 claims for Uzedy by this doctor in 2024.

Vanda 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 FANAPT as an associated drug or biological on 95605 records involving 21383 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Fanapt by this doctor in 2024.

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

Payment overview · 2025

General Payments

$3,428.83

105 reported records · 14 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
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $706.6520.6%162025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $539.2615.7%182025
Alkermes, Inc. Unresolved — no canonical attribution shown $407.6211.9%132025
Indivior Inc. Unresolved — no canonical attribution shown $330.069.6%122025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $281.318.2%112025
Janssen Pharmaceuticals, Inc Unresolved — no canonical attribution shown $264.317.7%82025
Neurocrine BioSciences, Inc. Unresolved — no canonical attribution shown $261.437.6%92025
Lundbeck LLC Unresolved — no canonical attribution shown $190.425.5%52025
Teva Pharmaceuticals USA, Inc. Unresolved — no canonical attribution shown $158.644.6%42025
Braeburn Inc. Unresolved — no canonical attribution shown $125.003.6%12025
ABBVIE INC. Unresolved — no canonical attribution shown $71.122.1%32025
Luye Pharma (USA) Ltd. Unresolved — no canonical attribution shown $48.131.4%32025
Aimmune Therapeutics, Inc. Unresolved — no canonical attribution shown $23.860.7%12025
Vanda Pharmaceuticals Inc. Unresolved — no canonical attribution shown $21.020.6%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$3,428.83105

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
REXULTI
Normalized: rexulti
Drug Lundbeck LLC, Otsuka America Pharmaceutical, Inc. $605.31 13 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $539.26 18 2025
Source payment records
LYBALVI
Normalized: lybalvi
Drug Alkermes, Inc. $371.69 11 2025
Source payment records
SUBLOCADE
Normalized: sublocade
Drug Indivior Inc. $330.06 12 2025
Source payment records
ABILIFY ASIMTUFII
Normalized: abilify asimtufii
Drug Otsuka America Pharmaceutical, Inc. $291.76 8 2025
Source payment records
ABILIFY MAINTENA
Normalized: abilify maintena
Drug Otsuka America Pharmaceutical, Inc. $291.76 8 2025
Source payment records
COBENFY
Normalized: cobenfy
Drug E.R. Squibb & Sons, L.L.C. $281.31 11 2025
Source payment records
ARISTADA
Normalized: aristada
Drug Alkermes, Inc. $276.12 11 2025
Source payment records
INVEGA SUSTENNA
Normalized: invega sustenna
Drug Janssen Pharmaceuticals, Inc $264.31 8 2025
Source payment records
INGREZZA
Normalized: ingrezza
Drug Neurocrine BioSciences, Inc. $261.43 9 2025
Source payment records
UZEDY
Normalized: uzedy
Drug Teva Pharmaceuticals USA, Inc. $140.40 3 2025
Source payment records
BRIXADI
Normalized: brixadi
Drug Braeburn Inc. $125.00 1 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $71.12 3 2025
Source payment records
ERZOFRI EXTENDED-RELEASE
Normalized: erzofri extended release
Drug Luye Pharma (USA) Ltd. $48.13 3 2025
Source payment records
ARISTADA INITIO
Normalized: aristada initio
Drug Alkermes, Inc. $27.78 1 2025
Source payment records
VOWST
Normalized: vowst
Biological Aimmune Therapeutics, Inc. $23.86 1 2025
Source payment records
FANAPT
Normalized: fanapt
Drug Vanda Pharmaceuticals Inc. $21.02 1 2025
Source payment records
AUSTEDO XR
Normalized: austedo xr
Drug Teva Pharmaceuticals USA, Inc. $18.24 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
ABILIFY ASIMTUFII
abilify asimtufii
2025 Abilify Asimtufii 2024 15
Beneficiary count suppressed
exact normalized Medicare Part D
ABILIFY MAINTENA
abilify maintena
2025 Abilify Maintena 2024 21
Beneficiary count suppressed
exact normalized Medicare Part D
ARISTADA
aristada
2025 Aristada 2024 28
Beneficiary count suppressed
exact normalized Medicare Part D
CAPLYTA
caplyta
2025 Caplyta 2024 54
Beneficiary count suppressed
exact normalized Medicare Part D
FANAPT
fanapt
2025 Fanapt 2024 13
Beneficiary count suppressed
exact normalized Medicare Part D
INVEGA SUSTENNA
invega sustenna
2025 Invega Sustenna 2024 145 exact normalized Medicare Part D
LYBALVI
lybalvi
2025 Lybalvi 2024 26
Beneficiary count suppressed
exact normalized Medicare Part D
REXULTI
rexulti
2025 Rexulti 2024 89
Beneficiary count suppressed
exact normalized Medicare Part D
UZEDY
uzedy
2025 Uzedy 2024 15
Beneficiary count suppressed
exact normalized Medicare Part D
VRAYLAR
vraylar
2025 Vraylar 2024 81
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
81 suppressed by CMS
Alkermes, Inc.
Exact reporting entity; no affiliate inference
2025 ARISTADA
open payments reported associated product
CMS Open Payments — General Payments
76041 supporting records · 17486 recipient NPIs · example record 1222428566
Aristada · 2024
Exact normalized brand match · 1 Part D row
28 suppressed by CMS
Alkermes, Inc.
Exact reporting entity; no affiliate inference
2025 LYBALVI
open payments reported associated product
CMS Open Payments — General Payments
93784 supporting records · 20135 recipient NPIs · example record 1222428566
Lybalvi · 2024
Exact normalized brand match · 1 Part D row
26 suppressed by CMS
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
Exact reporting entity; no affiliate inference
2025 CAPLYTA
open payments reported associated product
CMS Open Payments — General Payments
211855 supporting records · 46143 recipient NPIs · example record 1241243071
Caplyta · 2024
Exact normalized brand match · 1 Part D row
54 suppressed by CMS
Janssen Pharmaceuticals, Inc
Exact reporting entity; no affiliate inference
2025 Caplyta
open payments reported associated product
CMS Open Payments — General Payments
11 supporting records · 9 recipient NPIs · example record 1174547314
Caplyta · 2024
Exact normalized brand match · 1 Part D row
54 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
145 19
Janssen Pharmaceuticals, Inc
Exact reporting entity; no affiliate inference
2025 INVEGA TRINZA
open payments reported associated product
CMS Open Payments — General Payments
8191 supporting records · 2146 recipient NPIs · example record 1174223262
Invega Trinza · 2024
Exact normalized brand match · 1 Part D row
29 suppressed by CMS
Lundbeck LLC
Exact reporting entity; no affiliate inference
2025 ABILIFY ASIMTUFII
open payments reported associated product
CMS Open Payments — General Payments
4974 supporting records · 1745 recipient NPIs · example record 1251759998
Abilify Asimtufii · 2024
Exact normalized brand match · 1 Part D row
15 suppressed by CMS
Lundbeck LLC
Exact reporting entity; no affiliate inference
2025 ABILIFY MAINTENA
open payments reported associated product
CMS Open Payments — General Payments
2902 supporting records · 986 recipient NPIs · example record 1251759994
Abilify Maintena · 2024
Exact normalized brand match · 1 Part D row
21 suppressed by CMS
Lundbeck LLC
Exact reporting entity; no affiliate inference
2025 REXULTI
open payments reported associated product
CMS Open Payments — General Payments
71829 supporting records · 25812 recipient NPIs · example record 1251759986
Rexulti · 2024
Exact normalized brand match · 1 Part D row
89 suppressed by CMS
Otsuka America Pharmaceutical, Inc.
Exact reporting entity; no affiliate inference
2025 ABILIFY ASIMTUFII
open payments reported associated product
CMS Open Payments — General Payments
37017 supporting records · 12446 recipient NPIs · example record 1227267748
Abilify Asimtufii · 2024
Exact normalized brand match · 1 Part D row
15 suppressed by CMS
Otsuka America Pharmaceutical, Inc.
Exact reporting entity; no affiliate inference
2025 ABILIFY MAINTENA
open payments reported associated product
CMS Open Payments — General Payments
27924 supporting records · 10497 recipient NPIs · example record 1227267721
Abilify Maintena · 2024
Exact normalized brand match · 1 Part D row
21 suppressed by CMS
Otsuka America Pharmaceutical, Inc.
Exact reporting entity; no affiliate inference
2025 REXULTI
open payments reported associated product
CMS Open Payments — General Payments
160756 supporting records · 46288 recipient NPIs · example record 1227267708
Rexulti · 2024
Exact normalized brand match · 1 Part D row
89 suppressed by CMS
Teva Pharmaceuticals USA, Inc.
Exact reporting entity; no affiliate inference
2025 UZEDY
open payments reported associated product
CMS Open Payments — General Payments
46702 supporting records · 13355 recipient NPIs · example record 1247244226
Uzedy · 2024
Exact normalized brand match · 1 Part D row
15 suppressed by CMS
Vanda Pharmaceuticals Inc.
Exact reporting entity; no affiliate inference
2025 FANAPT
open payments reported associated product
CMS Open Payments — General Payments
95605 supporting records · 21383 recipient NPIs · example record 1232940535
Fanapt · 2024
Exact normalized brand match · 1 Part D row
13 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
Quetiapine FumarateQuetiapine Fumarate33440
Trazodone HclTrazodone Hcl30051
OlanzapineOlanzapine22321
Haloperidol DecanoateHaloperidol Decanoate19023
AripiprazoleAripiprazole17632
Escitalopram OxalateEscitalopram Oxalate16926
Buspirone HclBuspirone Hcl16830
Invega SustennaPaliperidone Palmitate14519
Benztropine MesylateBenztropine Mesylate13520
RisperidoneRisperidone13016
Sertraline HclSertraline Hcl12419
MirtazapineMirtazapine11516
Hydroxyzine PamoateHydroxyzine Pamoate10221
RexultiBrexpiprazole89suppressed
OxcarbazepineOxcarbazepine86suppressed
Fluoxetine HclFluoxetine Hcl8514
Duloxetine HclDuloxetine Hcl8414
VraylarCariprazine Hcl81suppressed
HaloperidolHaloperidol7815
Divalproex SodiumDivalproex Sodium7617
Lurasidone HclLurasidone Hcl6911
Divalproex Sodium ErDivalproex Sodium58suppressed
Paliperidone ErPaliperidone5811
Fluphenazine DecanoateFluphenazine Decanoate5711
CaplytaLumateperone Tosylate54suppressed
Fluphenazine HclFluphenazine Hcl5411
Bupropion XlBupropion Hcl52suppressed
Citalopram HbrCitalopram Hydrobromide48suppressed
Venlafaxine Hcl ErVenlafaxine Hcl44suppressed
Ziprasidone HclZiprasidone Hcl43suppressed
Doxepin HclDoxepin Hcl41suppressed
Bupropion Hcl SrBupropion Hcl40suppressed
Buprenorphine-NaloxoneBuprenorphine Hcl/Naloxone Hcl35suppressed
Invega TrinzaPaliperidone Palmitate29suppressed
AristadaAripiprazole Lauroxil28suppressed
Naltrexone HclNaltrexone Hcl28suppressed
Hydroxyzine HclHydroxyzine Hcl27suppressed
Amitriptyline HclAmitriptyline Hcl26suppressed
LybalviOlanzapine/Samidorphan Malate26suppressed
ClozapineClozapine25suppressed
Quetiapine Fumarate ErQuetiapine Fumarate24suppressed
Bupropion HclBupropion Hcl22suppressed
Paroxetine HclParoxetine Hcl22suppressed
Abilify MaintenaAripiprazole21suppressed
AuvelityDextromethorphan Hbr/Bupropion21suppressed
TopiramateTopiramate21suppressed
Propranolol HclPropranolol Hcl19suppressed
TrintellixVortioxetine Hydrobromide19suppressed
LamotrigineLamotrigine18suppressed
ClonazepamClonazepam17suppressed
Vilazodone HclVilazodone Hcl16suppressed
Abilify AsimtufiiAripiprazole15suppressed
UzedyRisperidone15suppressed
Atomoxetine HclAtomoxetine Hcl13suppressed
FanaptIloperidone13suppressed
AmantadineAmantadine Hcl12suppressed
CarbamazepineCarbamazepine11suppressed
GabapentinGabapentin11suppressed

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 $3,428.83 · 105 records Otsuka America Pharmaceutical, Inc. ABILIFY ASIMTUFII, ABILIFY MAINTENA, ARISTADA, ARISTADA INITIO, AUSTEDO XR, BRIXADI, CAPLYTA, COBENFY, ERZOFRI EXTENDED-RELEASE, FANAPT, INGREZZA, INVEGA SUSTENNA, LYBALVI, REXULTI, SUBLOCADE, UZEDY, VOWST, VRAYLAR 15
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