Healthcare provider profile · identity verified

Zachary Barber

Physician Assistants & Advanced Practice Nursing Providers|Nurse Practitioner|Family · VICTORIA, TX · NPI 1366098915

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 Zachary Barber received $367.56 in general payments during 2025 across 12 reported records.

Calyxo, Inc. accounted for 44.6% of that reported general-payment amount.

The Open Payments records used for this analysis explicitly named 9 associated products.

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

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 78 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 23 claims for Xtandi by this doctor in 2024.

Sumitomo Pharma America, 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 GEMTESA as an associated drug or biological on 61692 records involving 22152 distinct recipient NPIs. Public Medicare Part D data also shows 63 claims for Gemtesa by this doctor in 2024.

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

Payment overview · 2025

General Payments

$367.56

12 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
Calyxo, Inc. Unresolved — no canonical attribution shown $163.8344.6%12025
Antares Pharma, Inc. Unresolved — no canonical attribution shown $49.8413.6%32025
180 Medical, Inc. Unresolved — no canonical attribution shown $36.339.9%22025
Astellas Pharma US Inc Unresolved — no canonical attribution shown $35.479.7%22025
Procept Biorobotics Corporation Unresolved — no canonical attribution shown $27.007.3%12025
TOLMAR, INC. Unresolved — no canonical attribution shown $24.146.6%12025
Sumitomo Pharma America, Inc. Unresolved — no canonical attribution shown $16.744.5%12025
Braintree Laboratories, Inc. Unresolved — no canonical attribution shown $14.213.9%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$367.5612

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
CVAC ASPIRATION SYSTEM
Normalized: cvac aspiration system
Device Calyxo, Inc. $163.83 1 2025
Source payment records
XYOSTED
Normalized: xyosted
Drug Antares Pharma, Inc. $49.84 3 2025
Source payment records
Xtandi
Normalized: xtandi
Drug Astellas Pharma US Inc $35.47 2 2025
Source payment records
AQUABEAM ROBOTIC SYSTEM
Normalized: aquabeam robotic system
Device Procept Biorobotics Corporation $27.00 1 2025
Source payment records
ELIGARD
Normalized: eligard
Drug TOLMAR, INC. $24.14 1 2025
Source payment records
JATENZO
Normalized: jatenzo
Drug TOLMAR, INC. $24.14 1 2025
Source payment records
GEMTESA
Normalized: gemtesa
Drug Sumitomo Pharma America, Inc. $16.74 1 2025
Source payment records
SUFLAVE
Normalized: suflave
Drug Braintree Laboratories, Inc. $14.21 1 2025
Source payment records
SUTAB
Normalized: sutab
Drug Braintree Laboratories, Inc. $14.21 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
GEMTESA
gemtesa
2025 Gemtesa 2024 63 exact normalized Medicare Part D
Xtandi
xtandi
2025 Xtandi 2024 23
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
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
78 27
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
23 suppressed by CMS
Sumitomo Pharma America, Inc.
Exact reporting entity; no affiliate inference
2025 GEMTESA
open payments reported associated product
CMS Open Payments — General Payments
61692 supporting records · 22152 recipient NPIs · example record 1176593503
Gemtesa · 2024
Exact normalized brand match · 1 Part D row
63 20

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
Tamsulosin HclTamsulosin Hcl345116
SilodosinSilodosin8027
MyrbetriqMirabegron7827
GemtesaVibegron6320
FinasterideFinasteride5918
Testosterone CypionateTestosterone Cypionate4612
CephalexinCephalexin2929
Doxycycline HyclateDoxycycline Hyclate2322
XtandiEnzalutamide23suppressed
Solifenacin SuccinateSolifenacin Succinate15suppressed
Alfuzosin Hcl ErAlfuzosin Hcl12suppressed

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 $367.56 · 12 records Calyxo, Inc. AQUABEAM ROBOTIC SYSTEM, CVAC ASPIRATION SYSTEM, ELIGARD, GEMTESA, JATENZO, SUFLAVE, SUTAB, XYOSTED, Xtandi 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