Healthcare provider profile · identity verified

Robert J Holzhauer, MD

Allopathic & Osteopathic Physicians|Allergy & Immunology · SAN LUIS OBISPO, CA · NPI 1710955976

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 Robert J Holzhauer, MD received $1,068.16 in general payments during 2025 across 45 reported records.

GlaxoSmithKline, LLC. accounted for 20.2% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 13 associated products.

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

CSL Behring reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported Hizentra as an associated drug or biological on 13634 records involving 4691 distinct recipient NPIs. Public Medicare Part D data also shows 24 claims for Hizentra 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 40 claims for Trelegy Ellipta by this doctor in 2024.

Grifols 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 Xembify as an associated drug or biological on 5209 records involving 2197 distinct recipient NPIs. Public Medicare Part D data also shows 13 claims for Xembify by this doctor in 2024.

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

Payment overview · 2025

General Payments

$1,068.16

45 reported records · 13 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
GlaxoSmithKline, LLC. Unresolved — no canonical attribution shown $215.7820.2%132025
Regeneron Healthcare Solutions, Inc. Unresolved — no canonical attribution shown $211.3619.8%72025
Amgen Inc. Unresolved — no canonical attribution shown $104.869.8%42025
CSL Behring Unresolved — no canonical attribution shown $79.107.4%42025
Novartis Pharmaceuticals Corporation Unresolved — no canonical attribution shown $77.687.3%32025
Ionis Pharmaceuticals, Inc. Unresolved — no canonical attribution shown $74.317.0%32025
GENZYME CORPORATION Unresolved — no canonical attribution shown $72.686.8%32025
BioCryst US Sales Co., LLC Unresolved — no canonical attribution shown $60.265.6%22025
ARS Pharmaceuticals Operations, Inc. Unresolved — no canonical attribution shown $57.705.4%22025
Genentech USA, Inc. Unresolved — no canonical attribution shown $33.343.1%12025
Cycle Pharmaceuticals Inc Unresolved — no canonical attribution shown $27.722.6%12025
Pharming Healthcare, Inc. Unresolved — no canonical attribution shown $27.172.5%12025
Grifols USA, LLC Unresolved — no canonical attribution shown $26.202.5%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$944.1043
Education$124.062

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. $284.04 10 2025
Source payment records
NUCALA
Normalized: nucala
Biological GlaxoSmithKline, LLC. $215.78 13 2025
Source payment records
Andembry
Normalized: andembry
Biological CSL Behring $79.10 4 2025
Source payment records
XOLAIR
Normalized: xolair
Biological, Drug Genentech USA, Inc., Novartis Pharmaceuticals Corporation $60.75 2 2025
Source payment records
ORLADEYO
Normalized: orladeyo
Drug BioCryst US Sales Co., LLC $60.26 2 2025
Source payment records
NEFFY
Normalized: neffy
Drug ARS Pharmaceuticals Operations, Inc. $57.70 2 2025
Source payment records
DAWNZERA
Normalized: dawnzera
Drug Ionis Pharmaceuticals, Inc. $52.68 2 2025
Source payment records
TEZSPIRE
Normalized: tezspire
Biological Amgen Inc. $43.96 2 2025
Source payment records
Sajazir
Normalized: sajazir
Drug Cycle Pharmaceuticals Inc $27.72 1 2025
Source payment records
RUCONEST
Normalized: ruconest
Biological Pharming Healthcare, Inc. $27.17 1 2025
Source payment records
ACTIMMUNE
Normalized: actimmune
Biological Amgen Inc. $26.90 1 2025
Source payment records
Xembify
Normalized: xembify
Biological Grifols USA, LLC $26.20 1 2025
Source payment records
Rhapsido
Normalized: rhapsido
Drug Novartis Pharmaceuticals Corporation $22.32 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
Xembify
xembify
2025 Xembify 2024 13
Beneficiary count suppressed
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
CSL Behring
Exact reporting entity; no affiliate inference
2025 Hizentra
open payments reported associated product
CMS Open Payments — General Payments
13634 supporting records · 4691 recipient NPIs · example record 1232339012
Hizentra · 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
40 11
Grifols USA, LLC
Exact reporting entity; no affiliate inference
2025 Xembify
open payments reported associated product
CMS Open Payments — General Payments
5209 supporting records · 2197 recipient NPIs · example record 1249529389
Xembify · 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
Azelastine HclAzelastine Hcl5221
Ipratropium BromideIpratropium Bromide5223
Trelegy ElliptaFluticasone/Umeclidin/Vilanter4011
Albuterol Sulfate HfaAlbuterol Sulfate3614
Fluticasone PropionateFluticasone Propionate34suppressed
Breo ElliptaFluticasone/Vilanterol25suppressed
Dupixent PenDupilumab24suppressed
HizentraImmun Glob G(Igg)/Pro/Iga 0-5024suppressed
Arnuity ElliptaFluticasone Furoate23suppressed
DuleraMometasone/Formoterol21suppressed
Wixela InhubFluticasone Propion/Salmeterol19suppressed
Spiriva RespimatTiotropium Bromide18suppressed
Gammagard LiquidImmun Glob G(Igg)/Gly/Iga Ov5016suppressed
Fluticasone Propionate HfaFluticasone Propionate14suppressed
Fluticasone-SalmeterolFluticasone Propion/Salmeterol14suppressed
Montelukast SodiumMontelukast Sodium14suppressed
Advair HfaFluticasone Propion/Salmeterol13suppressed
Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate13suppressed
EpinephrineEpinephrine1312
XembifyImmune Globulin,gamma(Igg)klhw13suppressed

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 $1,068.16 · 45 records GlaxoSmithKline, LLC. ACTIMMUNE, Andembry, DAWNZERA, DUPIXENT, NEFFY, NUCALA, ORLADEYO, RUCONEST, Rhapsido, Sajazir, TEZSPIRE, XOLAIR, Xembify 3
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