Healthcare provider profile · identity verified

Nicklas Robert Pfanzelter, MD

Allopathic & Osteopathic Physicians|Internal Medicine|Medical Oncology · GLENVIEW, IL · NPI 1598968976

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 Nicklas Robert Pfanzelter, MD received $15,006.43 in general payments during 2025 across 10 reported records.

Merck Sharp & Dohme LLC accounted for 40.4% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 3 associated products.

Astellas Pharma US 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 Myrbetriq as an associated drug or biological on 16 records involving 16 distinct recipient NPIs. Public Medicare Part D data also shows 19 claims for Myrbetriq by this doctor in 2024.

Astellas Pharma US 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 Xtandi as an associated drug or biological on 11345 records involving 5418 distinct recipient NPIs. Public Medicare Part D data also shows 77 claims for Xtandi 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 13 claims for Eliquis 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 INLYTA as an associated drug or biological on 2646 records involving 1964 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Inlyta 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 ORGOVYX as an associated drug or biological on 16373 records involving 6981 distinct recipient NPIs. Public Medicare Part D data also shows 100 claims for Orgovyx 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 XTANDI as an associated drug or biological on 19368 records involving 7657 distinct recipient NPIs. Public Medicare Part D data also shows 77 claims for Xtandi by this doctor in 2024.

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

Payment overview · 2025

General Payments

$15,006.43

10 reported records · 5 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
Merck Sharp & Dohme LLC Unresolved — no canonical attribution shown $6,061.4440.4%42025
PFIZER INC. Unresolved — no canonical attribution shown $3,382.9522.5%22025
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $2,534.5416.9%22025
Eisai Inc. Unresolved — no canonical attribution shown $2,000.0013.3%12025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $1,027.506.8%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$9,072.503
Consulting Fee$4,450.002
Travel and Lodging$1,212.422
Food and Beverage$271.513

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
KEYTRUDA
Normalized: keytruda
Biological Merck Sharp & Dohme LLC $6,061.44 4 2025
Source payment records
PADCEV
Normalized: padcev
Biological, Drug Astellas Pharma US Inc, PFIZER INC. $4,410.45 3 2025
Source payment records
Lenvima
Normalized: lenvima
Drug Eisai Inc. $2,000.00 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
Astellas Pharma US Inc
Exact reporting entity; no affiliate inference
2025 Myrbetriq
open payments reported associated product
CMS Open Payments — General Payments
16 supporting records · 16 recipient NPIs · example record 1238599014
Myrbetriq · 2024
Exact normalized brand match · 1 Part D row
19 suppressed by CMS
Astellas Pharma US Inc
Exact reporting entity; no affiliate inference
2025 Xtandi
open payments reported associated product
CMS Open Payments — General Payments
11345 supporting records · 5418 recipient NPIs · example record 1238560686
Xtandi · 2024
Exact normalized brand match · 1 Part D row
77 13
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
13 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 INLYTA
open payments reported associated product
CMS Open Payments — General Payments
2646 supporting records · 1964 recipient NPIs · example record 1228795917
Inlyta · 2024
Exact normalized brand match · 1 Part D row
13 suppressed by CMS
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 ORGOVYX
open payments reported associated product
CMS Open Payments — General Payments
16373 supporting records · 6981 recipient NPIs · example record 1228794230
Orgovyx · 2024
Exact normalized brand match · 1 Part D row
100 12
PFIZER INC.
Exact reporting entity; no affiliate inference
2025 XTANDI
open payments reported associated product
CMS Open Payments — General Payments
19368 supporting records · 7657 recipient NPIs · example record 1228794230
Xtandi · 2024
Exact normalized brand match · 1 Part D row
77 13

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
Abiraterone AcetateAbiraterone Acetate39759
PrednisonePrednisone362101
OrgovyxRelugolix10012
DexamethasoneDexamethasone9342
XtandiEnzalutamide7713
NubeqaDarolutamide6712
ErleadaApalutamide66suppressed
Prochlorperazine MaleateProchlorperazine Maleate5646
Tamsulosin HclTamsulosin Hcl5220
CabometyxCabozantinib S-Malate5112
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen4219
Triamcinolone AcetonideTriamcinolone Acetonide3927
GabapentinGabapentin38suppressed
LoperamideLoperamide Hcl3721
MirtazapineMirtazapine30suppressed
Oxybutynin Chloride ErOxybutynin Chloride2911
Levothyroxine SodiumLevothyroxine Sodium26suppressed
Ondansetron OdtOndansetron24suppressed
Ondansetron HclOndansetron Hcl2322
Lidocaine-PrilocaineLidocaine/Prilocaine1913
MyrbetriqMirabegron19suppressed
Venlafaxine Hcl ErVenlafaxine Hcl19suppressed
Sertraline HclSertraline Hcl18suppressed
Ciprofloxacin HclCiprofloxacin Hcl1716
Hydroxyzine HclHydroxyzine Hcl17suppressed
Oxybutynin ChlorideOxybutynin Chloride1614
Amlodipine BesylateAmlodipine Besylate15suppressed
Ipratropium BromideIpratropium Bromide15suppressed
LorazepamLorazepam14suppressed
EliquisApixaban13suppressed
FurosemideFurosemide13suppressed
InlytaAxitinib13suppressed
Amoxicillin-Clavulanate PotassAmoxicillin/Potassium Clav12suppressed
Budesonide DrBudesonide12suppressed
PregabalinPregabalin12suppressed
Clobetasol PropionateClobetasol Propionate11suppressed
ClonazepamClonazepam11suppressed
LisinoprilLisinopril11suppressed
OmeprazoleOmeprazole11suppressed

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 $15,006.43 · 10 records Merck Sharp & Dohme LLC KEYTRUDA, Lenvima, PADCEV 6
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