Healthcare provider profile · identity verified

John Joseph De Guzman, APRN

Physician Assistants & Advanced Practice Nursing Providers|Nurse Practitioner|Family · HENDERSON, NV · NPI 1306626759

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 John Joseph De Guzman, APRN received $74.01 in general payments during 2025 across 3 reported records.

Grifols USA, LLC accounted for 67.0% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 2 associated products.

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

Payment overview · 2025

General Payments

$74.01

3 reported records · 2 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
Grifols USA, LLC Unresolved — no canonical attribution shown $49.5567.0%22025
GENZYME CORPORATION Unresolved — no canonical attribution shown $24.4633.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$74.013

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
Prolastin-C Liquid
Normalized: prolastin c liquid
Biological Grifols USA, LLC $49.55 2 2025
Source payment records
DUPIXENT
Normalized: dupixent
Biological GENZYME CORPORATION $24.46 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.

No publishable same-company prescribing overlap was found in the loaded Part D year. This does not mean the doctor never prescribed a drug reported elsewhere by a paying company.

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
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen1007235
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen535153
BaclofenBaclofen294108
GabapentinGabapentin27390
Oxycodone HclOxycodone Hcl26973
Cyclobenzaprine HclCyclobenzaprine Hcl21885
CelecoxibCelecoxib18582
Tramadol HclTramadol Hcl16568
PregabalinPregabalin15155
Lidocaine-PrilocaineLidocaine/Prilocaine12484
Tizanidine HclTizanidine Hcl11043
IbuprofenIbuprofen10849
MethocarbamolMethocarbamol9636
MeloxicamMeloxicam8644
LidocaineLidocaine5823
Morphine Sulfate ErMorphine Sulfate5318
Duloxetine HclDuloxetine Hcl4114
Morphine SulfateMorphine Sulfate3711
NaproxenNaproxen3618
Diclofenac SodiumDiclofenac Sodium1815
Ondansetron OdtOndansetron16suppressed
IbuIbuprofen13suppressed
Buprenorphine-NaloxoneBuprenorphine Hcl/Naloxone 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 $74.01 · 3 records Grifols USA, LLC DUPIXENT, Prolastin-C Liquid
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