Healthcare provider profile · identity verified

Mark C Chandler, MD

Allopathic & Osteopathic Physicians|Psychiatry & Neurology|Psychiatry · DURHAM, NC · NPI 1265452270

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 Mark C Chandler, MD received $2,651.21 in general payments during 2025 across 158 reported records.

Alkermes, Inc. accounted for 19.3% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 22 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Aristada, Caplyta, Fanapt, Ingrezza, Invega Sustenna, Lybalvi, Qelbree, Rexulti, 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 82 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 14 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 201 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 35 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 35 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 33 claims for Invega Sustenna 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.

Neurocrine BioSciences, 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 INGREZZA as an associated drug or biological on 126456 records involving 27390 distinct recipient NPIs. Public Medicare Part D data also shows 14 claims for Ingrezza 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 20 claims for Nuedexta 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.

Supernus 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 Qelbree as an associated drug or biological on 61278 records involving 18421 distinct recipient NPIs. Public Medicare Part D data also shows 39 claims for Qelbree 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 33 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

$2,651.21

158 reported records · 16 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
Alkermes, Inc. Unresolved — no canonical attribution shown $511.3819.3%362025
Vanda Pharmaceuticals Inc. Unresolved — no canonical attribution shown $419.0415.8%242025
Otsuka America Pharmaceutical, Inc. Unresolved — no canonical attribution shown $384.1114.5%172025
ABBVIE INC. Unresolved — no canonical attribution shown $329.1912.4%212025
Teva Pharmaceuticals USA, Inc. Unresolved — no canonical attribution shown $175.716.6%102025
Janssen Pharmaceuticals, Inc Unresolved — no canonical attribution shown $165.976.3%102025
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) Unresolved — no canonical attribution shown $154.045.8%132025
E.R. Squibb & Sons, L.L.C. Unresolved — no canonical attribution shown $134.775.1%82025
Lundbeck LLC Unresolved — no canonical attribution shown $118.094.5%52025
Neurocrine BioSciences, Inc. Unresolved — no canonical attribution shown $87.433.3%52025
Neos Therapeutics, LP Unresolved — no canonical attribution shown $41.891.6%22025
Collegium Pharmaceutical, Inc. Unresolved — no canonical attribution shown $41.711.6%22025
Bausch Health US, LLC Unresolved — no canonical attribution shown $33.431.3%22025
ACADIA Pharmaceuticals Inc Unresolved — no canonical attribution shown $22.330.8%12025
TMS NeuroHealth Centers Inc. Unresolved — no canonical attribution shown $18.460.7%12025
Supernus Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $13.660.5%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$2,651.21158

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
ARISTADA
Normalized: aristada
Drug Alkermes, Inc. $511.38 36 2025
Source payment records
LYBALVI
Normalized: lybalvi
Drug Alkermes, Inc. $511.38 36 2025
Source payment records
FANAPT
Normalized: fanapt
Drug Vanda Pharmaceuticals Inc. $419.04 24 2025
Source payment records
HETLIOZ
Normalized: hetlioz
Drug Vanda Pharmaceuticals Inc. $388.86 22 2025
Source payment records
REXULTI
Normalized: rexulti
Drug Lundbeck LLC, Otsuka America Pharmaceutical, Inc. $369.65 17 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $329.19 21 2025
Source payment records
CAPLYTA
Normalized: caplyta
Drug ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) $154.04 13 2025
Source payment records
AUSTEDO XR
Normalized: austedo xr
Drug Teva Pharmaceuticals USA, Inc. $153.10 9 2025
Source payment records
COBENFY
Normalized: cobenfy
Drug E.R. Squibb & Sons, L.L.C. $134.77 8 2025
Source payment records
ABILIFY ASIMTUFII
Normalized: abilify asimtufii
Drug Otsuka America Pharmaceutical, Inc. $109.44 4 2025
Source payment records
SPRAVATO
Normalized: spravato
Drug Janssen Pharmaceuticals, Inc $91.64 6 2025
Source payment records
INGREZZA
Normalized: ingrezza
Drug Neurocrine BioSciences, Inc. $87.43 5 2025
Source payment records
INVEGA SUSTENNA
Normalized: invega sustenna
Drug Janssen Pharmaceuticals, Inc $74.33 4 2025
Source payment records
Adzenys XR-ODT
Normalized: adzenys xr odt
Drug Neos Therapeutics, LP $41.89 2 2025
Source payment records
Jornay PM
Normalized: jornay pm
Drug Collegium Pharmaceutical, Inc. $41.71 2 2025
Source payment records
WELLBUTRIN
Normalized: wellbutrin
Drug Bausch Health US, LLC $33.43 2 2025
Source payment records
ABILIFY MAINTENA
Normalized: abilify maintena
Drug Otsuka America Pharmaceutical, Inc. $23.11 1 2025
Source payment records
UZEDY
Normalized: uzedy
Drug Teva Pharmaceuticals USA, Inc. $22.61 1 2025
Source payment records
DAYBUE
Normalized: daybue
Drug ACADIA Pharmaceuticals Inc $22.33 1 2025
Source payment records
TMS NeuroHealth Centers Inc.
Normalized: tms neurohealth centers inc
Device TMS NeuroHealth Centers Inc. $18.46 1 2025
Source payment records
APLENZIN
Normalized: aplenzin
Drug Bausch Health US, LLC $14.55 1 2025
Source payment records
Qelbree
Normalized: qelbree
Drug Supernus Pharmaceuticals, Inc. $13.66 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
ARISTADA
aristada
2025 Aristada 2024 14
Beneficiary count suppressed
exact normalized Medicare Part D
CAPLYTA
caplyta
2025 Caplyta 2024 35
Beneficiary count suppressed
exact normalized Medicare Part D
FANAPT
fanapt
2025 Fanapt 2024 33
Beneficiary count suppressed
exact normalized Medicare Part D
INGREZZA
ingrezza
2025 Ingrezza 2024 14
Beneficiary count suppressed
exact normalized Medicare Part D
INVEGA SUSTENNA
invega sustenna
2025 Invega Sustenna 2024 33
Beneficiary count suppressed
exact normalized Medicare Part D
LYBALVI
lybalvi
2025 Lybalvi 2024 201 exact normalized Medicare Part D
Qelbree
qelbree
2025 Qelbree 2024 39
Beneficiary count suppressed
exact normalized Medicare Part D
REXULTI
rexulti
2025 Rexulti 2024 89 exact normalized Medicare Part D
VRAYLAR
vraylar
2025 Vraylar 2024 82
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
82 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
14 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
201 17
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
35 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
35 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
33 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 17
Neurocrine BioSciences, Inc.
Exact reporting entity; no affiliate inference
2025 INGREZZA
open payments reported associated product
CMS Open Payments — General Payments
126456 supporting records · 27390 recipient NPIs · example record 1242766729
Ingrezza · 2024
Exact normalized brand match · 1 Part D row
14 suppressed by CMS
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
20 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 17
Supernus Pharmaceuticals, Inc.
Exact reporting entity; no affiliate inference
2025 Qelbree
open payments reported associated product
CMS Open Payments — General Payments
61278 supporting records · 18421 recipient NPIs · example record 1244861775
Qelbree · 2024
Exact normalized brand match · 1 Part D row
39 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
33 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
RisperidoneRisperidone76762
ClonazepamClonazepam63366
LorazepamLorazepam61270
AripiprazoleAripiprazole56755
OlanzapineOlanzapine49748
Duloxetine HclDuloxetine Hcl47553
Quetiapine FumarateQuetiapine Fumarate35028
Benztropine MesylateBenztropine Mesylate34933
LamotrigineLamotrigine34436
Clonidine HclClonidine Hcl30030
Trazodone HclTrazodone Hcl30037
GabapentinGabapentin29635
Fluvoxamine MaleateFluvoxamine Maleate28624
Escitalopram OxalateEscitalopram Oxalate26932
Hydroxyzine HclHydroxyzine Hcl26739
Fluoxetine HclFluoxetine Hcl25027
Divalproex Sodium ErDivalproex Sodium24825
Paroxetine HclParoxetine Hcl21024
MirtazapineMirtazapine20523
LybalviOlanzapine/Samidorphan Malate20117
Sertraline HclSertraline Hcl17822
ClozapineClozapine16411
Divalproex SodiumDivalproex Sodium16418
Lurasidone HclLurasidone Hcl15513
Quetiapine Fumarate ErQuetiapine Fumarate14911
Memantine Hcl ErMemantine Hcl14517
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine14012
Naltrexone HclNaltrexone Hcl12413
AmantadineAmantadine Hcl12217
Buspirone HclBuspirone Hcl12015
CarbamazepineCarbamazepine11515
HaloperidolHaloperidol111suppressed
Zolpidem TartrateZolpidem Tartrate11015
Memantine HclMemantine Hcl101suppressed
Ziprasidone HclZiprasidone Hcl101suppressed
AlprazolamAlprazolam9618
Paliperidone ErPaliperidone90suppressed
RexultiBrexpiprazole8917
Propranolol HclPropranolol Hcl8411
TopiramateTopiramate83suppressed
VraylarCariprazine Hcl82suppressed
DiazepamDiazepam8014
Citalopram HbrCitalopram Hydrobromide7411
Clorazepate DipotassiumClorazepate Dipotassium69suppressed
Clonidine Hcl ErClonidine Hcl60suppressed
Doxepin HclDoxepin Hcl55suppressed
TemazepamTemazepam54suppressed
Guanfacine Hcl ErGuanfacine Hcl52suppressed
Paroxetine CrParoxetine Hcl52suppressed
ZaleplonZaleplon50suppressed
Methylphenidate ErMethylphenidate Hcl49suppressed
DayvigoLemborexant46suppressed
Venlafaxine Hcl ErVenlafaxine Hcl46suppressed
Amitriptyline HclAmitriptyline Hcl44suppressed
TrintellixVortioxetine Hydrobromide44suppressed
Paroxetine ErParoxetine Hcl43suppressed
Chlorpromazine HclChlorpromazine Hcl42suppressed
EszopicloneEszopiclone42suppressed
Asenapine MaleateAsenapine Maleate41suppressed
Bupropion XlBupropion Hcl41suppressed
QelbreeViloxazine Hcl39suppressed
RivastigmineRivastigmine39suppressed
BelsomraSuvorexant36suppressed
CaplytaLumateperone Tosylate35suppressed
Carbamazepine ErCarbamazepine34suppressed
Olanzapine OdtOlanzapine3412
FanaptIloperidone33suppressed
Invega SustennaPaliperidone Palmitate33suppressed
OxcarbazepineOxcarbazepine32suppressed
Dextroamphetamine-Amphet ErDextroamphetamine/Amphetamine31suppressed
ConcertaMethylphenidate Hcl29suppressed
Lithium CarbonateLithium Carbonate29suppressed
Clozapine OdtClozapine25suppressed
Prazosin HclPrazosin Hcl25suppressed
Donepezil HclDonepezil Hcl24suppressed
Hydroxyzine PamoateHydroxyzine Pamoate23suppressed
RamelteonRamelteon22suppressed
EquetroCarbamazepine20suppressed
NuedextaDextromethorphan Hbr/Quinidine20suppressed
Bupropion Hcl SrBupropion Hcl19suppressed
VyvanseLisdexamfetamine Dimesylate19suppressed
CymbaltaDuloxetine Hcl16suppressed
LoxapineLoxapine Succinate16suppressed
Atomoxetine HclAtomoxetine Hcl15suppressed
RivastigmineRivastigmine Tartrate15suppressed
Alprazolam ErAlprazolam14suppressed
AristadaAripiprazole Lauroxil14suppressed
Galantamine HbrGalantamine Hbr14suppressed
IngrezzaValbenazine Tosylate14suppressed
MeloxicamMeloxicam14suppressed
Metoprolol SuccinateMetoprolol Succinate14suppressed
Desvenlafaxine Succinate ErDesvenlafaxine Succinate13suppressed
Fluvoxamine Maleate ErFluvoxamine Maleate13suppressed
Oxybutynin ChlorideOxybutynin Chloride13suppressed
PimozidePimozide13suppressed
Rosuvastatin CalciumRosuvastatin Calcium13suppressed
Lisdexamfetamine DimesylateLisdexamfetamine Dimesylate12suppressed
LovastatinLovastatin12suppressed
Vitamin D2Ergocalciferol (Vitamin D2)12suppressed
Clomipramine HclClomipramine Hcl11suppressed
Desipramine HclDesipramine Hcl11suppressed
Ritalin LaMethylphenidate 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 $2,651.21 · 158 records Alkermes, Inc. ABILIFY ASIMTUFII, ABILIFY MAINTENA, APLENZIN, ARISTADA, AUSTEDO XR, Adzenys XR-ODT, CAPLYTA, COBENFY, DAYBUE, FANAPT, HETLIOZ, INGREZZA, INVEGA SUSTENNA, Jornay PM, LYBALVI, Qelbree, REXULTI, SPRAVATO, TMS NeuroHealth Centers Inc., UZEDY, VRAYLAR, WELLBUTRIN 12
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