Healthcare provider profile · identity verified

Mark C Johnson, MD

Allopathic & Osteopathic Physicians|Internal Medicine · MASON CITY, IA · NPI 1013923127

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 Johnson, MD received $28,198.93 in general payments during 2025 across 35 reported records.

Novo Nordisk Inc accounted for 86.1% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 8 associated products.

A separate comparison found the same explicitly named product in public Medicare Part D data: Jardiance, Mounjaro, Ozempic.

Boehringer Ingelheim 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 JARDIANCE as an associated drug or biological on 123636 records involving 49438 distinct recipient NPIs. Public Medicare Part D data also shows 749 claims for Jardiance by this doctor in 2024.

Boehringer Ingelheim 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 SYNJARDY as an associated drug or biological on 33 records involving 33 distinct recipient NPIs. Public Medicare Part D data also shows 30 claims for Synjardy 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 749 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 240 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 381 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 Fiasp as an associated drug or biological on 15 records involving 15 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Fiasp 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 1205 claims for Ozempic 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 Rybelsus as an associated drug or biological on 161257 records involving 55409 distinct recipient NPIs. Public Medicare Part D data also shows 39 claims for Rybelsus by this doctor in 2024.

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

Payment overview · 2025

General Payments

$28,198.93

35 reported records · 7 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
Novo Nordisk Inc Unresolved — no canonical attribution shown $24,286.5286.1%232025
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $2,775.009.8%32025
Lilly USA, LLC Unresolved — no canonical attribution shown $984.113.5%22025
Abbott Laboratories Unresolved — no canonical attribution shown $99.150.3%42025
Dexcom, Inc. Unresolved — no canonical attribution shown $19.680.1%12025
Medtronic, Inc. Medtronic, Inc.
exact · evidence 2025-07-22
$19.040.1%12025
Sequel Med Tech, LLC Unresolved — no canonical attribution shown $15.430.1%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$25,343.4411
Travel and Lodging$1,893.359
Food and Beverage$962.1415

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
Ozempic
Normalized: ozempic
Drug Novo Nordisk Inc $24,251.06 22 2025
Source payment records
JARDIANCE
Normalized: jardiance
Drug Boehringer Ingelheim Pharmaceuticals, Inc., Lilly USA, LLC $3,750.00 4 2025
Source payment records
FREESTYLE LIBRE 3
Normalized: freestyle libre 3
Device Abbott Laboratories $99.15 4 2025
Source payment records
Dexcom G6 Transmitter
Normalized: dexcom g6 transmitter
Medical Supply Dexcom, Inc. $19.68 1 2025
Source payment records
MINIMED 780G
Normalized: minimed 780g
Device Medtronic, Inc. $19.04 1 2025
Source payment records
TWIIST
Normalized: twiist
Device Sequel Med Tech, LLC $15.43 1 2025
Source payment records
MOUNJARO
Normalized: mounjaro
Drug Lilly USA, LLC $9.11 1 2025
Source payment records
ZEPBOUND
Normalized: zepbound
Drug Lilly USA, LLC $9.11 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
JARDIANCE
jardiance
2025 Jardiance 2024 749 exact normalized Medicare Part D
MOUNJARO
mounjaro
2025 Mounjaro 2024 240 exact normalized Medicare Part D
Ozempic
ozempic
2025 Ozempic 2024 1205 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
Boehringer Ingelheim Pharmaceuticals, Inc.
Exact reporting entity; no affiliate inference
2025 JARDIANCE
open payments reported associated product
CMS Open Payments — General Payments
123636 supporting records · 49438 recipient NPIs · example record 1221811583
Jardiance · 2024
Exact normalized brand match · 1 Part D row
749 125
Boehringer Ingelheim Pharmaceuticals, Inc.
Exact reporting entity; no affiliate inference
2025 SYNJARDY
open payments reported associated product
CMS Open Payments — General Payments
33 supporting records · 33 recipient NPIs · example record 1222725005
Synjardy · 2024
Exact normalized brand match · 1 Part D row
30 suppressed by CMS
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
749 125
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
240 51
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
381 54
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Fiasp
open payments reported associated product
CMS Open Payments — General Payments
15 supporting records · 15 recipient NPIs · example record 1188262936
Fiasp · 2024
Exact normalized brand match · 1 Part D row
24 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
1205 170
Novo Nordisk Inc
Exact reporting entity; no affiliate inference
2025 Rybelsus
open payments reported associated product
CMS Open Payments — General Payments
161257 supporting records · 55409 recipient NPIs · example record 1188130076
Rybelsus · 2024
Exact normalized brand match · 1 Part D row
39 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
OzempicSemaglutide1205170
JardianceEmpagliflozin749125
Novolog FlexpenInsulin Aspart492130
Soliqua 100-33Insulin Glargine/Lixisenatide47568
TrulicityDulaglutide38154
Synjardy XrEmpagliflozin/Metformin Hcl34457
Nano 2nd Gen Pen NeedlePen Needle, Diabetic321100
Atorvastatin CalciumAtorvastatin Calcium319100
FarxigaDapagliflozin Propanediol31959
Lantus SolostarInsulin Glargine,hum.Rec.Anlog31180
Humalog Kwikpen U-100Insulin Lispro26968
Metformin Hcl ErMetformin Hcl24769
MounjaroTirzepatide24051
Metformin HclMetformin Hcl23069
Losartan PotassiumLosartan Potassium19760
Basaglar Kwikpen U-100Insulin Glargine,hum.Rec.Anlog18338
Fiasp FlextouchInsulin Aspart (Niacinamide)18343
Tresiba Flextouch U-100Insulin Degludec17246
Xigduo XrDapaglifloz Propaned/Metformin13621
CarvedilolCarvedilol11226
Levothyroxine SodiumLevothyroxine Sodium11032
LisinoprilLisinopril11038
Insulin Lispro Kwikpen U-100Insulin Lispro10927
Novolog Mix 70-30 FlexpenInsulin Aspart Prot/Insuln Asp10824
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog9922
TorsemideTorsemide9431
SpironolactoneSpironolactone8727
Tresiba Flextouch U-200Insulin Degludec7616
Humalog Kwikpen U-200Insulin Lispro7113
HumalogInsulin Lispro6115
Ultra-Fine Mini Pen NeedlePen Needle, Diabetic6123
TopiramateTopiramate6018
Rosuvastatin CalciumRosuvastatin Calcium5818
Ultra-Fine Nano Pen NeedlePen Needle, Diabetic5720
LamotrigineLamotrigine55suppressed
Sumatriptan SuccinateSumatriptan Succinate55suppressed
FluconazoleFluconazole5221
NovologInsulin Aspart5117
Humalog Mix 75-25 KwikpenInsulin Lispro Protamin/Lispro4912
Bydureon BciseExenatide Microspheres48suppressed
Toujeo Max SolostarInsulin Glargine,hum.Rec.Anlog4613
GlimepirideGlimepiride42suppressed
Trazodone HclTrazodone Hcl4011
Ultra-Fine Short Pen NeedlePen Needle, Diabetic4014
RybelsusSemaglutide39suppressed
Duloxetine HclDuloxetine Hcl3814
Fluoxetine HclFluoxetine Hcl3711
Levemir FlexpenInsulin Detemir3520
Insulin Aspart FlexpenInsulin Aspart3317
Hydralazine HclHydralazine Hcl32suppressed
SimvastatinSimvastatin3211
InvokanaCanagliflozin31suppressed
SynjardyEmpagliflozin/Metformin Hcl30suppressed
Unifine Safecontrol Pen NeedlePen Needle,dual Safety,diabetc30suppressed
LantusInsulin Glargine,hum.Rec.Anlog2811
Venlafaxine Hcl ErVenlafaxine Hcl28suppressed
Insulin LisproInsulin Lispro2711
Admelog SolostarInsulin Lispro2611
Novolin 70-30Insulin Nph Hum/Reg Insulin Hm26suppressed
Victoza 2-PakLiraglutide26suppressed
FiaspInsulin Aspart (Niacinamide)24suppressed
GabapentinGabapentin24suppressed
Humulin N KwikpenInsulin Nph Human Isophane24suppressed
Ulticare Pen NeedlePen Needle, Diabetic2313
Victoza 3-PakLiraglutide23suppressed
Nurtec OdtRimegepant Sulfate22suppressed
Omnipod 5 Dexg7g6 Pods (Gen 5)Insulin Pump Cart,auto,bt,g6/722suppressed
Quetiapine FumarateQuetiapine Fumarate21suppressed
Humalog Mix 50-50 KwikpenInsulin Lispro Protamin/Lispro19suppressed
MethimazoleMethimazole19suppressed
Metoprolol SuccinateMetoprolol Succinate19suppressed
Droplet Pen NeedlePen Needle, Diabetic18suppressed
HydrochlorothiazideHydrochlorothiazide18suppressed
Novolin RInsulin Regular, Human18suppressed
Novolin 70-30 FlexpenInsulin Nph Hum/Reg Insulin Hm17suppressed
Novolog Mix 70-30Insulin Aspart Prot/Insuln Asp17suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide16suppressed
Lyumjev Kwikpen U-100Insulin Lispro-Aabc16suppressed
Techlite Pen NeedlePen Needle, Diabetic16suppressed
Metoprolol TartrateMetoprolol Tartrate15suppressed
Pravastatin SodiumPravastatin Sodium15suppressed
Divalproex Sodium ErDivalproex Sodium14suppressed
Triamcinolone AcetonideTriamcinolone Acetonide14suppressed
Methadone HclMethadone Hcl13suppressed
Sertraline HclSertraline Hcl13suppressed
KerendiaFinerenone12suppressed
OmeprazoleOmeprazole12suppressed
Buspirone HclBuspirone Hcl11suppressed
Eletriptan HbrEletriptan Hydrobromide11suppressed
LorazepamLorazepam11suppressed
Novofine 32Pen Needle, Diabetic11suppressed
OxycontinOxycodone Hcl11suppressed
Pen NeedlePen Needle, Diabetic11suppressed

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 $28,198.93 · 35 records Novo Nordisk Inc Dexcom G6 Transmitter, FREESTYLE LIBRE 3, JARDIANCE, MINIMED 780G, MOUNJARO, Ozempic, TWIIST, ZEPBOUND 8
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