Healthcare provider profile · identity verified

Karol Dyan Merrifield, FNP-C

Physician Assistants & Advanced Practice Nursing Providers|Nurse Practitioner|Family · FITZGERALD, GA · NPI 1801554449

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 Karol Dyan Merrifield, FNP-C received $446.79 in general payments during 2025 across 22 reported records.

GlaxoSmithKline, LLC. accounted for 25.9% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 14 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Mounjaro, Ozempic, Trelegy Ellipta, 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 LINZESS as an associated drug or biological on 87954 records involving 21815 distinct recipient NPIs. Public Medicare Part D data also shows 80 claims for Linzess by this doctor in 2024.

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 21 claims for Synthroid by this doctor in 2024.

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 20 claims for Vraylar by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported FARXIGA as an associated drug or biological on 106133 records involving 42906 distinct recipient NPIs. Public Medicare Part D data also shows 88 claims for Farxiga by this doctor in 2024.

AstraZeneca Pharmaceuticals LP reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported SYMBICORT as an associated drug or biological on 71 records involving 51 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Symbicort by this doctor in 2024.

GlaxoSmithKline, 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 TRELEGY ELLIPTA as an associated drug or biological on 131532 records involving 37148 distinct recipient NPIs. Public Medicare Part D data also shows 53 claims for Trelegy Ellipta by this doctor in 2024.

Lilly USA, 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 JARDIANCE as an associated drug or biological on 47708 records involving 23833 distinct recipient NPIs. Public Medicare Part D data also shows 47 claims for Jardiance by this doctor in 2024.

Lilly USA, 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 MOUNJARO as an associated drug or biological on 186719 records involving 66436 distinct recipient NPIs. Public Medicare Part D data also shows 92 claims for Mounjaro by this doctor in 2024.

Lilly USA, 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 TRULICITY as an associated drug or biological on 71 records involving 57 distinct recipient NPIs. Public Medicare Part D data also shows 12 claims for Trulicity by this doctor in 2024.

Novo Nordisk 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 Ozempic as an associated drug or biological on 261625 records involving 77793 distinct recipient NPIs. Public Medicare Part D data also shows 109 claims for Ozempic by this doctor in 2024.

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

Payment overview · 2025

General Payments

$446.79

22 reported records · 9 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
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $115.7725.9%52025
Novo Nordisk Inc Unresolved — no canonical attribution shown $99.7622.3%42025
Ardelyx, Inc. Unresolved — no canonical attribution shown $57.1112.8%22025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $56.0712.6%32025
ABBVIE INC. Unresolved — no canonical attribution shown $33.407.5%22025
Phathom Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $30.776.9%32025
Lilly USA, LLC Unresolved — no canonical attribution shown $19.954.5%12025
Vanda Pharmaceuticals Inc. Unresolved — no canonical attribution shown $18.934.2%12025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $15.033.4%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$446.7922

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
TRELEGY ELLIPTA
Normalized: trelegy ellipta
Drug GlaxoSmithKline, LLC. $115.77 5 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $75.15 3 2025
Source payment records
AREXVY
Normalized: arexvy
Biological GlaxoSmithKline, LLC. $68.42 3 2025
Source payment records
IBSRELA
Normalized: ibsrela
Drug Ardelyx, Inc. $57.11 2 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $38.55 2 2025
Source payment records
VRAYLAR
Normalized: vraylar
Drug ABBVIE INC. $33.40 2 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $31.08 1 2025
Source payment records
VOQUEZNA
Normalized: voquezna
Drug Phathom Pharmaceuticals, Inc. $30.77 3 2025
Source payment records
Wegovy
Normalized: wegovy
Drug Novo Nordisk Inc $24.61 1 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $19.95 1 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $19.95 1 2025
Source payment records
FANAPT
Normalized: fanapt
Drug Vanda Pharmaceuticals Inc. $18.93 1 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $17.52 1 2025
Source payment records
Kerendia
Normalized: kerendia
Drug Bayer Healthcare Pharmaceuticals Inc. $15.03 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
MOUNJARO
mounjaro
2025 Mounjaro 2024 92 exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 109 exact normalized Medicare Part D
TRELEGY ELLIPTA
trelegy ellipta
2025 Trelegy Ellipta 2024 53 exact normalized Medicare Part D
VRAYLAR
vraylar
2025 Vraylar 2024 20
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 LINZESS
open payments reported associated product
CMS Open Payments — General Payments
87954 supporting records · 21815 recipient NPIs · example record 1201352608
Linzess · 2024
Exact normalized brand match · 1 Part D row
80 16
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
21 suppressed by CMS
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
20 suppressed by CMS
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 FARXIGA
open payments reported associated product
CMS Open Payments — General Payments
106133 supporting records · 42906 recipient NPIs · example record 1206131362
Farxiga · 2024
Exact normalized brand match · 1 Part D row
88 16
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 SYMBICORT
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 51 recipient NPIs · example record 1206132610
Symbicort · 2024
Exact normalized brand match · 1 Part D row
12 suppressed by CMS
GlaxoSmithKline, LLC.
Exact reporting entity; no affiliate inference
2025 TRELEGY ELLIPTA
open payments reported associated product
CMS Open Payments — General Payments
131532 supporting records · 37148 recipient NPIs · example record 1190332369
Trelegy Ellipta · 2024
Exact normalized brand match · 1 Part D row
53 13
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
47708 supporting records · 23833 recipient NPIs · example record 1186464557
Jardiance · 2024
Exact normalized brand match · 1 Part D row
47 12
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 MOUNJARO
open payments reported associated product
CMS Open Payments — General Payments
186719 supporting records · 66436 recipient NPIs · example record 1186464455
Mounjaro · 2024
Exact normalized brand match · 1 Part D row
92 23
Lilly USA, LLC
Exact reporting entity; no affiliate inference
2025 TRULICITY
open payments reported associated product
CMS Open Payments — General Payments
71 supporting records · 57 recipient NPIs · example record 1186464601
Trulicity · 2024
Exact normalized brand match · 1 Part D row
12 suppressed by CMS
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Ozempic
open payments reported associated product
CMS Open Payments — General Payments
261625 supporting records · 77793 recipient NPIs · example record 1188130076
Ozempic · 2024
Exact normalized brand match · 1 Part D row
109 26

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 Besylate33685
Atorvastatin CalciumAtorvastatin Calcium32183
Levothyroxine SodiumLevothyroxine Sodium31365
Potassium ChloridePotassium Chloride27170
Losartan PotassiumLosartan Potassium25971
Tramadol HclTramadol Hcl23757
GabapentinGabapentin23261
Metformin HclMetformin Hcl21857
Pantoprazole SodiumPantoprazole Sodium21153
Metoprolol SuccinateMetoprolol Succinate20455
OmeprazoleOmeprazole19258
Trazodone HclTrazodone Hcl17532
AlprazolamAlprazolam17140
GlimepirideGlimepiride17141
MeloxicamMeloxicam15745
HydrochlorothiazideHydrochlorothiazide15239
Montelukast SodiumMontelukast Sodium15039
Fluticasone PropionateFluticasone Propionate14450
LisinoprilLisinopril14344
EliquisApixaban13122
Cyclobenzaprine HclCyclobenzaprine Hcl12935
ClopidogrelClopidogrel Bisulfate12230
Hydralazine HclHydralazine Hcl11125
OzempicSemaglutide10926
FurosemideFurosemide10732
Ropinirole HclRopinirole Hcl10623
Zolpidem TartrateZolpidem Tartrate10518
Albuterol Sulfate HfaAlbuterol Sulfate10430
Rosuvastatin CalciumRosuvastatin Calcium10425
CarvedilolCarvedilol9224
MounjaroTirzepatide9223
Acetaminophen-CodeineAcetaminophen With Codeine9125
Duloxetine HclDuloxetine Hcl8922
FarxigaDapagliflozin Propanediol8816
Esomeprazole MagnesiumEsomeprazole Magnesium8219
LorazepamLorazepam8214
Tamsulosin HclTamsulosin Hcl8221
LinzessLinaclotide8016
AzithromycinAzithromycin7773
FamotidineFamotidine7724
AllopurinolAllopurinol7220
SpironolactoneSpironolactone7115
Paroxetine HclParoxetine Hcl6814
Escitalopram OxalateEscitalopram Oxalate6611
SimvastatinSimvastatin6617
ClonazepamClonazepam6414
CelecoxibCelecoxib6315
Fluoxetine HclFluoxetine Hcl6318
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav6157
Doxycycline MonohydrateDoxycycline Monohydrate6053
FluconazoleFluconazole5924
Tresiba Flextouch U-100Insulin Degludec5615
IbuprofenIbuprofen5314
Metformin Hcl ErMetformin Hcl5312
Trelegy ElliptaFluticasone/Umeclidin/Vilanter5313
Venlafaxine Hcl ErVenlafaxine Hcl5311
XareltoRivaroxaban52suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide5013
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide4815
JardianceEmpagliflozin4712
Citalopram HbrCitalopram Hydrobromide4513
Dicyclomine HclDicyclomine Hcl4512
Bupropion XlBupropion Hcl44suppressed
Nifedipine ErNifedipine4411
Sertraline HclSertraline Hcl4412
SucralfateSucralfate4415
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid44suppressed
Buspirone HclBuspirone Hcl4311
Clonidine HclClonidine Hcl43suppressed
Pravastatin SodiumPravastatin Sodium4311
PrednisonePrednisone4333
TelmisartanTelmisartan42suppressed
Tizanidine HclTizanidine Hcl4213
TorsemideTorsemide41suppressed
ValacyclovirValacyclovir Hcl4116
Alendronate SodiumAlendronate Sodium4011
PregabalinPregabalin4013
Metoprolol TartrateMetoprolol Tartrate3915
ColchicineColchicine3613
Isosorbide Mononitrate ErIsosorbide Mononitrate36suppressed
LevetiracetamLevetiracetam36suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog36suppressed
Warfarin SodiumWarfarin Sodium34suppressed
IrbesartanIrbesartan3311
Ondansetron HclOndansetron Hcl3117
Nitrofurantoin Mono-MacroNitrofurantoin Monohyd/M-Cryst3025
Quetiapine FumarateQuetiapine Fumarate30suppressed
Benazepril HclBenazepril Hcl28suppressed
EstradiolEstradiol28suppressed
EzetimibeEzetimibe28suppressed
Hydroxyzine PamoateHydroxyzine Pamoate28suppressed
Hydroxyzine HclHydroxyzine Hcl27suppressed
AtenololAtenolol26suppressed
ChlorthalidoneChlorthalidone26suppressed
NystatinNystatin2614
Oxybutynin Chloride ErOxybutynin Chloride26suppressed
Bisoprolol-HydrochlorothiazideBisoprolol/Hydrochlorothiazide25suppressed
Desipramine HclDesipramine Hcl25suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog25suppressed
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine2412
Diclofenac SodiumDiclofenac Sodium23suppressed
Meclizine HclMeclizine Hcl2312
TopiramateTopiramate23suppressed
EszopicloneEszopiclone22suppressed
Humalog Kwikpen U-100Insulin Lispro22suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim2221
DiazepamDiazepam21suppressed
Levocetirizine DihydrochlorideLevocetirizine Dihydrochloride21suppressed
SynthroidLevothyroxine Sodium21suppressed
Donepezil HclDonepezil Hcl20suppressed
Klor-Con M10Potassium Chloride20suppressed
MupirocinMupirocin20suppressed
VraylarCariprazine Hcl20suppressed
FenofibrateFenofibrate Nanocrystallized19suppressed
IndapamideIndapamide19suppressed
Ventolin HfaAlbuterol Sulfate19suppressed
BaclofenBaclofen17suppressed
Dexlansoprazole DrDexlansoprazole17suppressed
NitroglycerinNitroglycerin17suppressed
PaxlovidNirmatrelvir/Ritonavir1717
Clindamycin HclClindamycin Hcl1613
GlipizideGlipizide16suppressed
LevofloxacinLevofloxacin1614
Pioglitazone HclPioglitazone Hcl16suppressed
RivastigmineRivastigmine Tartrate16suppressed
Ciprofloxacin HclCiprofloxacin Hcl1515
Colesevelam HclColesevelam Hcl15suppressed
Tresiba Flextouch U-200Insulin Degludec15suppressed
Verapamil ErVerapamil Hcl15suppressed
Doxycycline HyclateDoxycycline Hyclate1413
Hydroxychloroquine SulfateHydroxychloroquine Sulfate14suppressed
KetoconazoleKetoconazole14suppressed
MyrbetriqMirabegron14suppressed
Novolog FlexpenInsulin Aspart14suppressed
OlanzapineOlanzapine14suppressed
RisperidoneRisperidone14suppressed
Triamcinolone AcetonideTriamcinolone Acetonide14suppressed
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr13suppressed
Bisoprolol FumarateBisoprolol Fumarate13suppressed
CarisoprodolCarisoprodol13suppressed
Pilocarpine HclPilocarpine Hcl13suppressed
PrimidonePrimidone13suppressed
Testosterone CypionateTestosterone Cypionate13suppressed
Ultra-Fine Nano Pen NeedlePen Needle, Diabetic13suppressed
Cyanocobalamin InjectionCyanocobalamin (Vitamin B-12)12suppressed
Diltiazem 24hr ErDiltiazem Hcl12suppressed
JanuviaSitagliptin Phosphate12suppressed
Labetalol HclLabetalol Hcl12suppressed
LantusInsulin Glargine,hum.Rec.Anlog12suppressed
LovastatinLovastatin12suppressed
MethotrexateMethotrexate Sodium12suppressed
MetronidazoleMetronidazole1212
Promethazine HclPromethazine Hcl12suppressed
Propranolol HclPropranolol Hcl12suppressed
RoflumilastRoflumilast12suppressed
Spiriva RespimatTiotropium Bromide12suppressed
SymbicortBudesonide/Formoterol Fumarate12suppressed
Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog12suppressed
TrulicityDulaglutide12suppressed
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic12suppressed
Azelastine HclAzelastine Hcl11suppressed
Betamethasone DipropionateBetamethasone Dipropionate11suppressed
CilostazolCilostazol11suppressed
Levemir FlexpenInsulin Detemir11suppressed
Memantine HclMemantine Hcl11suppressed
Nebivolol HclNebivolol Hcl11suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl11suppressed
Vitamin D2Ergocalciferol (Vitamin D2)11suppressed

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 $446.79 · 22 records GlaxoSmithKline, LLC. AIRSUPRA, AREXVY, BREZTRI, FANAPT, IBSRELA, Kerendia, MOUNJARO, Ozempic, Rybelsus, TRELEGY ELLIPTA, VOQUEZNA, VRAYLAR, Wegovy, ZEPBOUND 10
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