Healthcare provider profile · identity verified

Nathan B. Allen, D.O.

Allopathic & Osteopathic Physicians|Family Medicine · LEON, IA · NPI 1629398987

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 Nathan B. Allen, D.O. received $228.76 in general payments during 2025 across 13 reported records.

Boehringer Ingelheim Pharmaceuticals, Inc. accounted for 36.2% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 11 associated products.

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

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 LUMIGAN as an associated drug or biological on 25016 records involving 7645 distinct recipient NPIs. Public Medicare Part D data also shows 16 claims for Lumigan 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 22 claims for Synthroid 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 110 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 27 claims for Symbicort 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 JARDIANCE as an associated drug or biological on 123636 records involving 49438 distinct recipient NPIs. Public Medicare Part D data also shows 280 claims for Jardiance by this doctor in 2024.

PFIZER 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 ABRYSVO as an associated drug or biological on 55380 records involving 31565 distinct recipient NPIs. Public Medicare Part D data also shows 18 claims for Abrysvo by this doctor in 2024.

PFIZER 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 ELIQUIS as an associated drug or biological on 87112 records involving 36032 distinct recipient NPIs. Public Medicare Part D data also shows 203 claims for Eliquis by this doctor in 2024.

SANOFI-AVENTIS U.S. 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 LANTUS as an associated drug or biological on 12 records involving 11 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Lantus by this doctor in 2024.

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

Payment overview · 2025

General Payments

$228.76

13 reported records · 8 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
Boehringer Ingelheim Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $82.7136.2%52025
Bayer Healthcare Pharmaceuticals Inc. Unresolved — no canonical attribution shown $31.6713.8%22025
PFIZER INC. Unresolved — no canonical attribution shown $24.5510.7%12025
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $23.5510.3%12025
ABBVIE INC. Unresolved — no canonical attribution shown $17.837.8%12025
SANOFI-AVENTIS U.S. LLC Unresolved — no canonical attribution shown $16.797.3%12025
AstraZeneca Pharmaceuticals LP Unresolved — no canonical attribution shown $16.057.0%12025
Teva Pharmaceuticals USA, Inc. Unresolved — no canonical attribution shown $15.616.8%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$209.9112
Education$18.851

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
JARDIANCE
Normalized: jardiance
Drug Boehringer Ingelheim Pharmaceuticals, Inc. $82.71 5 2025
Source payment records
Kerendia
Normalized: kerendia
Drug Bayer Healthcare Pharmaceuticals Inc. $31.67 2 2025
Source payment records
ABRYSVO
Normalized: abrysvo
Biological PFIZER INC. $24.55 1 2025
Source payment records
COMIRNATY
Normalized: comirnaty
Biological PFIZER INC. $24.55 1 2025
Source payment records
PREVNAR 20
Normalized: prevnar 20
Biological PFIZER INC. $24.55 1 2025
Source payment records
CAPVAXIVE
Normalized: capvaxive
Biological Merck Sharp & Dohme LLC $23.55 1 2025
Source payment records
ENFLONSIA
Normalized: enflonsia
Drug Merck Sharp & Dohme LLC $23.55 1 2025
Source payment records
GARDASIL 9
Normalized: gardasil 9
Biological Merck Sharp & Dohme LLC $23.55 1 2025
Source payment records
UBRELVY
Normalized: ubrelvy
Drug ABBVIE INC. $17.83 1 2025
Source payment records
TZIELD
Normalized: tzield
Biological SANOFI-AVENTIS U.S. LLC $16.79 1 2025
Source payment records
AUSTEDO XR
Normalized: austedo xr
Drug Teva Pharmaceuticals USA, Inc. $15.61 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
ABRYSVO
abrysvo
2025 Abrysvo 2024 18 exact normalized Medicare Part D
JARDIANCE
jardiance
2025 Jardiance 2024 280 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 LUMIGAN
open payments reported associated product
CMS Open Payments — General Payments
25016 supporting records · 7645 recipient NPIs · example record 1201352548
Lumigan · 2024
Exact normalized brand match · 1 Part D row
16 suppressed by CMS
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
22 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
110 26
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
27 12
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
280 45
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 ABRYSVO
open payments reported associated product
CMS Open Payments — General Payments
55380 supporting records · 31565 recipient NPIs · example record 1228794147
Abrysvo · 2024
Exact normalized brand match · 1 Part D row
18 18
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 ELIQUIS
open payments reported associated product
CMS Open Payments — General Payments
87112 supporting records · 36032 recipient NPIs · example record 1228794063
Eliquis · 2024
Exact normalized brand match · 1 Part D row
203 32
SANOFI-AVENTIS U.S. LLC
Exact reporting entity; no affiliate inference
2025 LANTUS
open payments reported associated product
CMS Open Payments — General Payments
12 supporting records · 11 recipient NPIs · example record 1233196856
Lantus · 2024
Exact normalized brand match · 1 Part D row
13 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
LisinoprilLisinopril522129
Levothyroxine SodiumLevothyroxine Sodium46388
OmeprazoleOmeprazole33490
Atorvastatin CalciumAtorvastatin Calcium33286
Amlodipine BesylateAmlodipine Besylate32284
Metoprolol SuccinateMetoprolol Succinate29462
FurosemideFurosemide29056
GabapentinGabapentin28359
JardianceEmpagliflozin28045
Pantoprazole SodiumPantoprazole Sodium28062
Pravastatin SodiumPravastatin Sodium27073
Rosuvastatin CalciumRosuvastatin Calcium27088
Losartan PotassiumLosartan Potassium25968
HydrochlorothiazideHydrochlorothiazide24974
Metformin HclMetformin Hcl24054
EliquisApixaban20332
Potassium ChloridePotassium Chloride20241
SimvastatinSimvastatin19541
Tamsulosin HclTamsulosin Hcl16145
Warfarin SodiumWarfarin Sodium15021
OzempicSemaglutide14635
SpironolactoneSpironolactone13529
XareltoRivaroxaban13527
Trazodone HclTrazodone Hcl13231
AllopurinolAllopurinol13127
Metoprolol TartrateMetoprolol Tartrate13138
Tramadol HclTramadol Hcl13031
ClopidogrelClopidogrel Bisulfate11825
Escitalopram OxalateEscitalopram Oxalate11221
Montelukast SodiumMontelukast Sodium11224
Sertraline HclSertraline Hcl11224
FarxigaDapagliflozin Propanediol11026
Metformin Hcl ErMetformin Hcl10221
Albuterol Sulfate HfaAlbuterol Sulfate9828
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen8817
MirtazapineMirtazapine8813
Fluticasone PropionateFluticasone Propionate8721
AlprazolamAlprazolam8311
PrednisonePrednisone8333
Duloxetine HclDuloxetine Hcl7913
EzetimibeEzetimibe7626
LevetiracetamLevetiracetam75suppressed
LorazepamLorazepam75suppressed
CarvedilolCarvedilol7421
Donepezil HclDonepezil Hcl7215
Bisoprolol FumarateBisoprolol Fumarate6516
Citalopram HbrCitalopram Hydrobromide6516
Buspirone HclBuspirone Hcl62suppressed
ChlorthalidoneChlorthalidone5815
Tresiba Flextouch U-200Insulin Degludec56suppressed
Oxybutynin Chloride ErOxybutynin Chloride54suppressed
Diclofenac SodiumDiclofenac Sodium5324
AtenololAtenolol5016
Memantine HclMemantine Hcl4811
Pramipexole DihydrochloridePramipexole Di-Hcl47suppressed
LatanoprostLatanoprost46suppressed
Lisinopril-HydrochlorothiazideLisinopril/Hydrochlorothiazide4611
GlipizideGlipizide44suppressed
MeloxicamMeloxicam4316
Tresiba Flextouch U-100Insulin Degludec4212
Enalapril MaleateEnalapril Maleate41suppressed
Esomeprazole MagnesiumEsomeprazole Magnesium3911
Glipizide ErGlipizide39suppressed
MounjaroTirzepatide39suppressed
Amiodarone HclAmiodarone Hcl38suppressed
Benazepril HclBenazepril Hcl38suppressed
FinasterideFinasteride3814
Novolog FlexpenInsulin Aspart38suppressed
BaclofenBaclofen37suppressed
ClonazepamClonazepam36suppressed
Doxycycline MonohydrateDoxycycline Monohydrate3627
ShingrixVaricella-Zoster Ge/As01b/Pf3629
Timolol MaleateTimolol Maleate36suppressed
MyrbetriqMirabegron35suppressed
Ropinirole HclRopinirole Hcl35suppressed
Triamcinolone AcetonideTriamcinolone Acetonide3521
Ciprofloxacin HclCiprofloxacin Hcl3431
Quetiapine FumarateQuetiapine Fumarate34suppressed
TrulicityDulaglutide34suppressed
Ventolin HfaAlbuterol Sulfate3415
Alendronate SodiumAlendronate Sodium33suppressed
Losartan-HydrochlorothiazideLosartan/Hydrochlorothiazide33suppressed
Bupropion XlBupropion Hcl32suppressed
CephalexinCephalexin3222
Diltiazem 24hr Er (Cd)Diltiazem Hcl32suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog3211
Spiriva HandihalerTiotropium Bromide32suppressed
PregabalinPregabalin31suppressed
Dilt-XrDiltiazem Hcl30suppressed
Tizanidine HclTizanidine Hcl30suppressed
Colesevelam HclColesevelam Hcl29suppressed
CefdinirCefdinir2821
Hydroxyzine HclHydroxyzine Hcl28suppressed
Amitriptyline HclAmitriptyline Hcl27suppressed
FamotidineFamotidine27suppressed
Isosorbide Mononitrate ErIsosorbide Mononitrate27suppressed
SymbicortBudesonide/Formoterol Fumarate2712
Triamterene-HydrochlorothiazidTriamterene/Hydrochlorothiazid27suppressed
Victoza 3-PakLiraglutide2714
Cyclobenzaprine HclCyclobenzaprine Hcl2611
LovastatinLovastatin26suppressed
NaproxenNaproxen26suppressed
Toujeo SolostarInsulin Glargine,hum.Rec.Anlog26suppressed
Ultra-Fine Nano Pen NeedlePen Needle, Diabetic2612
Victoza 2-PakLiraglutide2614
Zolpidem TartrateZolpidem Tartrate26suppressed
Fluoxetine HclFluoxetine Hcl25suppressed
JanuviaSitagliptin Phosphate25suppressed
LidocaineLidocaine25suppressed
TravoprostTravoprost25suppressed
Azelastine HclAzelastine Hcl24suppressed
CelecoxibCelecoxib24suppressed
DigoxinDigoxin24suppressed
Pioglitazone HclPioglitazone Hcl24suppressed
Terazosin HclTerazosin Hcl24suppressed
CombiganBrimonidine Tartrate/Timolol23suppressed
Trelegy ElliptaFluticasone/Umeclidin/Vilanter23suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol22suppressed
IbuprofenIbuprofen22suppressed
NystatinNystatin22suppressed
Stiolto RespimatTiotropium Br/Olodaterol Hcl22suppressed
SynthroidLevothyroxine Sodium22suppressed
TopiramateTopiramate22suppressed
Carbamazepine ErCarbamazepine21suppressed
Anoro ElliptaUmeclidinium Brm/Vilanterol Tr20suppressed
Bupropion Hcl SrBupropion Hcl20suppressed
Chlorhexidine GluconateChlorhexidine Gluconate20suppressed
Advair HfaFluticasone Propion/Salmeterol19suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav1915
AzithromycinAzithromycin19suppressed
FenofibrateFenofibrate Nanocrystallized19suppressed
FluconazoleFluconazole19suppressed
Oxycodone HclOxycodone Hcl19suppressed
AbrysvoRsv Vacc, Pref A And Pref B/Pf1818
AmoxicillinAmoxicillin18suppressed
Olmesartan-HydrochlorothiazideOlmesartan/Hydrochlorothiazide18suppressed
Clonidine HclClonidine Hcl17suppressed
HydrocortisoneHydrocortisone17suppressed
Autoshield Duo Pen NeedlePen Needle,dual Safety,diabetc16suppressed
BumetanideBumetanide16suppressed
LumiganBimatoprost16suppressed
Olmesartan MedoxomilOlmesartan Medoxomil16suppressed
Amlodipine Besylate-BenazeprilAmlodipine Besylate/Benazepril15suppressed
DofetilideDofetilide15suppressed
Doxepin HclDoxepin Hcl15suppressed
EntrestoSacubitril/Valsartan15suppressed
Incruse ElliptaUmeclidinium Bromide15suppressed
LactuloseLactulose15suppressed
Novofine AutocoverPen Needle, Diabetic, Safety15suppressed
SucralfateSucralfate15suppressed
ValsartanValsartan15suppressed
Varenicline TartrateVarenicline Tartrate15suppressed
NitroglycerinNitroglycerin1413
Oxybutynin ChlorideOxybutynin Chloride14suppressed
Paroxetine HclParoxetine Hcl14suppressed
SotalolSotalol Hcl14suppressed
TradjentaLinagliptin14suppressed
BetaseronInterferon Beta-1b13suppressed
Bisoprolol-HydrochlorothiazideBisoprolol/Hydrochlorothiazide13suppressed
LantusInsulin Glargine,hum.Rec.Anlog13suppressed
Carbidopa-Levodopa-EntacaponeCarbidopa/Levodopa/Entacapone12suppressed
Insulin Aspart FlexpenInsulin Aspart12suppressed
IrbesartanIrbesartan12suppressed
LamotrigineLamotrigine12suppressed
Levemir FlexpenInsulin Detemir12suppressed
Metoclopramide HclMetoclopramide Hcl12suppressed
Ziprasidone HclZiprasidone Hcl12suppressed
Bethanechol ChlorideBethanechol Chloride11suppressed
CopaxoneGlatiramer Acetate11suppressed
Insulin Lispro Kwikpen U-100Insulin Lispro11suppressed
MupirocinMupirocin1111
Propranolol HclPropranolol Hcl11suppressed
Ultra-Fine Short Pen NeedlePen Needle, Diabetic11suppressed
UrsodiolUrsodiol11suppressed
ValacyclovirValacyclovir 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 $228.76 · 13 records Boehringer Ingelheim Pharmaceuticals, Inc. ABRYSVO, AUSTEDO XR, CAPVAXIVE, COMIRNATY, ENFLONSIA, GARDASIL 9, JARDIANCE, Kerendia, PREVNAR 20, TZIELD, UBRELVY 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