Healthcare provider profile · identity verified

Marc O. Merbaum, M.D.

Allopathic & Osteopathic Physicians|Internal Medicine · SAINT LOUIS, MO · NPI 1245204338

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 Marc O. Merbaum, M.D. received $18.81 in general payments during 2025 across 1 reported records.

ABBVIE INC. accounted for 100.0% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 1 associated product.

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 SYNTHROID as an associated drug or biological on 10655 records involving 4881 distinct recipient NPIs. Public Medicare Part D data also shows 27 claims for Synthroid by this doctor in 2024.

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

Payment overview · 2025

General Payments

$18.81

1 reported records · 1 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
ABBVIE INC. Unresolved — no canonical attribution shown $18.81100.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$18.811

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
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $18.81 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
ABBVIE INC.
Exact reporting entity; no affiliate inference
2025 SYNTHROID
open payments reported associated product
CMS Open Payments — General Payments
10655 supporting records · 4881 recipient NPIs · example record 1201352636
Synthroid · 2024
Exact normalized brand match · 1 Part D row
27 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
Amlodipine BesylateAmlodipine Besylate787210
LisinoprilLisinopril718192
Atorvastatin CalciumAtorvastatin Calcium552148
Levothyroxine SodiumLevothyroxine Sodium518126
Metoprolol SuccinateMetoprolol Succinate506141
Rosuvastatin CalciumRosuvastatin Calcium380113
SimvastatinSimvastatin32179
Losartan PotassiumLosartan Potassium31488
Metformin HclMetformin Hcl30989
HydrochlorothiazideHydrochlorothiazide27077
Pantoprazole SodiumPantoprazole Sodium24876
EliquisApixaban21840
OmeprazoleOmeprazole20858
AllopurinolAllopurinol20158
Sertraline HclSertraline Hcl20051
GabapentinGabapentin18554
Tamsulosin HclTamsulosin Hcl17955
Tramadol HclTramadol Hcl17447
Albuterol Sulfate HfaAlbuterol Sulfate16451
Metoprolol TartrateMetoprolol Tartrate16446
Pravastatin SodiumPravastatin Sodium15140
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid14937
FurosemideFurosemide14239
PrednisonePrednisone13476
TelmisartanTelmisartan13440
MeloxicamMeloxicam13239
LovastatinLovastatin12935
Citalopram HbrCitalopram Hydrobromide12430
AlprazolamAlprazolam11843
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen11828
ClonazepamClonazepam11426
Potassium ChloridePotassium Chloride10527
Memantine HclMemantine Hcl10123
Hydralazine HclHydralazine Hcl9630
BaclofenBaclofen8632
CephalexinCephalexin8655
Donepezil HclDonepezil Hcl8521
Escitalopram OxalateEscitalopram Oxalate8526
Doxazosin MesylateDoxazosin Mesylate8424
TorsemideTorsemide8326
AtenololAtenolol8123
ClopidogrelClopidogrel Bisulfate8024
EzetimibeEzetimibe7920
Trazodone HclTrazodone Hcl7619
JanuviaSitagliptin Phosphate7217
Fluticasone PropionateFluticasone Propionate6823
FenofibrateFenofibrate6719
Duloxetine HclDuloxetine Hcl6620
TradjentaLinagliptin6614
OzempicSemaglutide6313
AzithromycinAzithromycin6255
Warfarin SodiumWarfarin Sodium6221
FinasterideFinasteride5918
Metformin Hcl ErMetformin Hcl5916
Felodipine ErFelodipine5616
Folic AcidFolic Acid5511
GlipizideGlipizide5416
Fluoxetine HclFluoxetine Hcl5315
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide5315
Trelegy ElliptaFluticasone/Umeclidin/Vilanter53suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog5012
Nifedipine ErNifedipine4914
Glipizide ErGlipizide4813
Semglee (Yfgn) PenInsulin Glargine-Yfgn47suppressed
Montelukast SodiumMontelukast Sodium4611
XareltoRivaroxaban45suppressed
Bupropion Hcl SrBupropion Hcl4411
ChlorthalidoneChlorthalidone4412
ArexvyRsvpref3 Antigen/As01e/Pf4141
CarvedilolCarvedilol4113
Zolpidem TartrateZolpidem Tartrate4113
Breo ElliptaFluticasone/Vilanterol40suppressed
IrbesartanIrbesartan4012
CefdinirCefdinir3936
FamotidineFamotidine3814
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide3811
MounjaroTirzepatide37suppressed
Sumatriptan SuccinateSumatriptan Succinate37suppressed
NaproxenNaproxen3516
Bupropion XlBupropion Hcl34suppressed
Triamcinolone AcetonideTriamcinolone Acetonide3418
Cyclobenzaprine HclCyclobenzaprine Hcl33suppressed
Venlafaxine Hcl ErVenlafaxine Hcl33suppressed
Enalapril MaleateEnalapril Maleate32suppressed
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst3224
SpironolactoneSpironolactone3211
DigoxinDigoxin31suppressed
Diltiazem 24hr Er (Cd)Diltiazem Hcl31suppressed
Ipratropium BromideIpratropium Bromide3114
PaxlovidNirmatrelvir/Ritonavir3131
Ibandronate SodiumIbandronate Sodium3011
ValacyclovirValacyclovir Hcl3014
Carbidopa-LevodopaCarbidopa/Levodopa29suppressed
JardianceEmpagliflozin29suppressed
Paroxetine HclParoxetine Hcl29suppressed
Alendronate SodiumAlendronate Sodium28suppressed
MirtazapineMirtazapine27suppressed
SynthroidLevothyroxine Sodium27suppressed
GlimepirideGlimepiride26suppressed
Sildenafil CitrateSildenafil Citrate26suppressed
Wixela InhubFluticasone Propion/Salmeterol26suppressed
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr25suppressed
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic2511
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate24suppressed
Nano 2nd Gen Pen NeedlePen Needle, Diabetic2311
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen22suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic22suppressed
Diclofenac SodiumDiclofenac Sodium21suppressed
Meclizine HclMeclizine Hcl21suppressed
Oxybutynin Chloride ErOxybutynin Chloride21suppressed
FenofibrateFenofibrate Nanocrystallized20suppressed
Risedronate SodiumRisedronate Sodium20suppressed
Tiadylt ErDiltiazem Hcl20suppressed
Irbesartan-HydrochlorothiazideIrbesartan/Hydrochlorothiazide19suppressed
MyrbetriqMirabegron19suppressed
Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog19suppressed
Buspirone HclBuspirone Hcl18suppressed
Ciprofloxacin HclCiprofloxacin Hcl1816
Clonidine HclClonidine Hcl18suppressed
Doxycycline HyclateDoxycycline Hyclate1814
TrulicityDulaglutide18suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine16suppressed
LansoprazoleLansoprazole16suppressed
Diltiazem 24hr ErDiltiazem Hcl15suppressed
Insulin Aspart FlexpenInsulin Aspart15suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate15suppressed
Klor-Con M20Potassium Chloride15suppressed
LorazepamLorazepam15suppressed
SymbicortBudesonide/Formoterol Fumarate15suppressed
Amitriptyline HclAmitriptyline Hcl14suppressed
Labetalol HclLabetalol Hcl14suppressed
Telmisartan-HydrochlorothiazidTelmisartan/Hydrochlorothiazid14suppressed
AcyclovirAcyclovir13suppressed
Azelastine HclAzelastine Hcl13suppressed
DiazepamDiazepam13suppressed
Methylphenidate HclMethylphenidate Hcl13suppressed
TemazepamTemazepam13suppressed
Carbidopa-Levodopa ErCarbidopa/Levodopa12suppressed
Clotrimazole-BetamethasoneClotrimazole/Betamethasone Dip12suppressed
Humalog Kwikpen U-100Insulin Lispro12suppressed
Quetiapine FumarateQuetiapine Fumarate12suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide12suppressed
AcarboseAcarbose11suppressed
CelecoxibCelecoxib11suppressed
Dabigatran EtexilateDabigatran Etexilate Mesylate11suppressed
FarxigaDapagliflozin Propanediol11suppressed
Hydroxyzine HclHydroxyzine Hcl11suppressed
Midodrine HclMidodrine Hcl11suppressed
Tolterodine Tartrate ErTolterodine Tartrate11suppressed

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 $18.81 · 1 records ABBVIE INC. UBRELVY 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