Healthcare provider profile · identity verified

Michael C Marshall, MD

Allopathic & Osteopathic Physicians|Internal Medicine|Pulmonary Disease · WEST COLUMBIA, SC · NPI 1326026287

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 C Marshall, MD received $1,344.83 in general payments during 2025 across 65 reported records.

AstraZeneca Pharmaceuticals LP accounted for 26.5% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 25 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Nucala, Trelegy Ellipta.

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 BEVESPI AEROSPHERE as an associated drug or biological on 763 records involving 473 distinct recipient NPIs. Public Medicare Part D data also shows 50 claims for Bevespi Aerosphere 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 244 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 NUCALA as an associated drug or biological on 100127 records involving 16970 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Nucala 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 815 claims for Trelegy Ellipta by this doctor in 2024.

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

Payment overview · 2025

General Payments

$1,344.83

65 reported records · 19 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
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $356.0726.5%172025
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $264.5819.7%162025
GENZYME CORPORATION Unresolved — no canonical attribution shown $175.7713.1%62025
Regeneron Healthcare Solutions, Inc. Unresolved — no canonical attribution shown $99.077.4%32025
Verona Pharma, Inc. Unresolved — no canonical attribution shown $75.435.6%42025
Amgen Inc. Unresolved — no canonical attribution shown $50.803.8%22025
ANI Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $42.043.1%22025
United Therapeutics Corporation Unresolved — no canonical attribution shown $39.813.0%22025
Viatris Specialty LLC Unresolved — no canonical attribution shown $35.992.7%22025
JAZZ PHARMACEUTICALS INC. Unresolved — no canonical attribution shown $29.402.2%12025
PFIZER INC. Unresolved — no canonical attribution shown $29.312.2%22025
Takeda Pharmaceuticals U.S.A., Inc. Unresolved — no canonical attribution shown $22.791.7%12025
Avadel CNS Pharmaceuticals, LLC Unresolved — no canonical attribution shown $19.781.5%12025
Novo Nordisk Inc Unresolved — no canonical attribution shown $19.531.4%12025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $19.251.4%12025
Axsome Therapeutics, Inc. Unresolved — no canonical attribution shown $17.571.3%12025
Azurity Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $16.521.2%12025
Liquidia Technologies, Inc. Unresolved — no canonical attribution shown $16.451.2%12025
Insmed, Inc. Unresolved — no canonical attribution shown $14.671.1%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$1,310.8364
Education$34.001

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
DUPIXENT
Normalized: dupixent
Biological GENZYME CORPORATION, Regeneron Healthcare Solutions, Inc. $274.84 9 2025
Source payment records
FASENRA
Normalized: fasenra
Biological AstraZeneca Pharmaceuticals LP $212.03 9 2025
Source payment records
NUCALA
Normalized: nucala
Biological GlaxoSmithKline, LLC. $143.81 8 2025
Source payment records
TRELEGY ELLIPTA
Normalized: trelegy ellipta
Drug GlaxoSmithKline, LLC. $120.77 8 2025
Source payment records
Ohtuvayre
Normalized: ohtuvayre
Drug Verona Pharma, Inc. $75.43 4 2025
Source payment records
TEZSPIRE
Normalized: tezspire
Biological Amgen Inc., AstraZeneca Pharmaceuticals LP $71.33 4 2025
Source payment records
AIRSUPRA
Normalized: airsupra
Drug AstraZeneca Pharmaceuticals LP $71.13 4 2025
Source payment records
PURIFIED CORTROPHIN GEL
Normalized: purified cortrophin gel
Drug ANI Pharmaceuticals, Inc. $42.04 2 2025
Source payment records
Tyvaso
Normalized: tyvaso
Drug United Therapeutics Corporation $39.81 2 2025
Source payment records
YUPELRI
Normalized: yupelri
Drug Viatris Specialty LLC $35.99 2 2025
Source payment records
XYWAV
Normalized: xywav
Drug JAZZ PHARMACEUTICALS INC. $29.40 1 2025
Source payment records
ABRYSVO
Normalized: abrysvo
Biological PFIZER INC. $29.31 2 2025
Source payment records
COMIRNATY
Normalized: comirnaty
Biological PFIZER INC. $29.31 2 2025
Source payment records
PREVNAR 20
Normalized: prevnar 20
Biological PFIZER INC. $29.31 2 2025
Source payment records
AREXVY
Normalized: arexvy
Biological GlaxoSmithKline, LLC. $25.29 2 2025
Source payment records
HYQVIA
Normalized: hyqvia
Biological Takeda Pharmaceuticals U.S.A., Inc. $22.79 1 2025
Source payment records
LUMRYZ
Normalized: lumryz
Drug Avadel CNS Pharmaceuticals, LLC $19.78 1 2025
Source payment records
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $19.53 1 2025
Source payment records
Rybelsus
Normalized: rybelsus
Drug Novo Nordisk Inc $19.53 1 2025
Source payment records
Adempas
Normalized: adempas
Drug Bayer Healthcare Pharmaceuticals Inc. $19.25 1 2025
Source payment records
BREZTRI
Normalized: breztri
Drug AstraZeneca Pharmaceuticals LP $18.38 1 2025
Source payment records
Sunosi
Normalized: sunosi
Drug Axsome Therapeutics, Inc. $17.57 1 2025
Source payment records
ALVESCO
Normalized: alvesco
Drug Azurity Pharmaceuticals, Inc. $16.52 1 2025
Source payment records
YUTREPIA
Normalized: yutrepia
Drug Liquidia Technologies, Inc. $16.45 1 2025
Source payment records
Arikayce
Normalized: arikayce
Drug Insmed, Inc. $14.67 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
NUCALA
nucala
2025 Nucala 2024 24
Beneficiary count suppressed
exact normalized Medicare Part D
TRELEGY ELLIPTA
trelegy ellipta
2025 Trelegy Ellipta 2024 815 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
AstraZeneca Pharmaceuticals LP
Exact reporting entity; no affiliate inference
2025 BEVESPI AEROSPHERE
open payments reported associated product
CMS Open Payments — General Payments
763 supporting records · 473 recipient NPIs · example record 1206131384
Bevespi Aerosphere · 2024
Exact normalized brand match · 1 Part D row
50 13
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
244 71
GlaxoSmithKline, LLC.
Exact reporting entity; no affiliate inference
2025 NUCALA
open payments reported associated product
CMS Open Payments — General Payments
100127 supporting records · 16970 recipient NPIs · example record 1190332378
Nucala · 2024
Exact normalized brand match · 1 Part D row
24 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
815 191

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
Albuterol Sulfate HfaAlbuterol Sulfate1208475
Trelegy ElliptaFluticasone/Umeclidin/Vilanter815191
PrednisonePrednisone502338
Montelukast SodiumMontelukast Sodium501162
Breztri AerosphereBudesonide/Glycopyr/Formoterol436110
Breo ElliptaFluticasone/Vilanterol39396
Spiriva RespimatTiotropium Bromide34668
SymbicortBudesonide/Formoterol Fumarate24471
Fluticasone-SalmeterolFluticasone Propion/Salmeterol20454
Fluticasone PropionateFluticasone Propionate18685
Arnuity ElliptaFluticasone Furoate16236
Wixela InhubFluticasone Propion/Salmeterol14342
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate13548
Advair HfaFluticasone Propion/Salmeterol12133
Qvar RedihalerBeclomethasone Dipropionate11835
Stiolto RespimatTiotropium Br/Olodaterol Hcl11227
Ventolin HfaAlbuterol Sulfate10133
MethylprednisoloneMethylprednisolone9893
DuleraMometasone/Formoterol9529
Azelastine HclAzelastine Hcl9038
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr8519
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav7760
AzithromycinAzithromycin6226
BreynaBudesonide/Formoterol Fumarate6119
Doxycycline HyclateDoxycycline Hyclate5840
Incruse ElliptaUmeclidinium Bromide5115
Bevespi AerosphereGlycopyrrolate/Formoterol Fum5013
Esomeprazole MagnesiumEsomeprazole Magnesium44suppressed
FamotidineFamotidine44suppressed
GabapentinGabapentin42suppressed
LevofloxacinLevofloxacin4231
AcetazolamideAcetazolamide39suppressed
NystatinNystatin3830
Ipratropium BromideIpratropium Bromide3513
OmeprazoleOmeprazole34suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine32suppressed
NucalaMepolizumab24suppressed
OfevNintedanib Esylate24suppressed
ClonazepamClonazepam23suppressed
Asmanex HfaMometasone Furoate22suppressed
Pantoprazole SodiumPantoprazole Sodium20suppressed
Spiriva HandihalerTiotropium Bromide20suppressed
OpsumitMacitentan19suppressed
Pramipexole DihydrochloridePramipexole Di-Hcl19suppressed
RoflumilastRoflumilast18suppressed
Pulmicort FlexhalerBudesonide16suppressed
Tiotropium BromideTiotropium Bromide15suppressed
Combivent RespimatIpratropium/Albuterol Sulfate13suppressed
Fasenra PenBenralizumab13suppressed
FurosemideFurosemide13suppressed
Levocetirizine DihydrochlorideLevocetirizine Dihydrochloride13suppressed
Trazodone HclTrazodone Hcl13suppressed
Azelastine-FluticasoneAzelastine/Fluticasone12suppressed
FluconazoleFluconazole12suppressed
MupirocinMupirocin12suppressed
Zileuton ErZileuton12suppressed
Mometasone FuroateMometasone Furoate11suppressed
Sildenafil CitrateSildenafil Citrate11suppressed

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 $1,344.83 · 65 records AstraZeneca Pharmaceuticals LP ABRYSVO, AIRSUPRA, ALVESCO, AREXVY, Adempas, Arikayce, BREZTRI, COMIRNATY, DUPIXENT, FASENRA, HYQVIA, LUMRYZ, NUCALA, Ohtuvayre, Ozempic, PREVNAR 20, PURIFIED CORTROPHIN GEL, Rybelsus, Sunosi, TEZSPIRE, TRELEGY ELLIPTA, Tyvaso, XYWAV, YUPELRI, YUTREPIA 4
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