Healthcare provider profile · identity verified

Gregory Anstead, MD

Allopathic & Osteopathic Physicians|General Practice · SAN ANTONIO, TX · NPI 1144337213

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 Gregory Anstead, MD received $18,471.78 in general payments during 2025 across 16 reported records.

Gilead Sciences, Inc. accounted for 99.9% of that reported general-payment amount.

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

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

Gilead Sciences, 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 Biktarvy as an associated drug or biological on 8065 records involving 2759 distinct recipient NPIs. Public Medicare Part D data also shows 70 claims for Biktarvy by this doctor in 2024.

Gilead Sciences, 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 Descovy as an associated drug or biological on 2032 records involving 589 distinct recipient NPIs. Public Medicare Part D data also shows 26 claims for Descovy by this doctor in 2024.

ViiV Healthcare Company reported payments to this doctor in 2025. Across the 2025 Open Payments General Payment records loaded for this analysis, that same reporting entity reported DOVATO as an associated drug or biological on 18732 records involving 3540 distinct recipient NPIs. Public Medicare Part D data also shows 129 claims for Dovato by this doctor in 2024.

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

Payment overview · 2025

General Payments

$18,471.78

16 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
Gilead Sciences, Inc. Unresolved — no canonical attribution shown $18,446.0699.9%152025
ViiV Healthcare Company Unresolved — no canonical attribution shown $25.720.1%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$15,900.005
Travel and Lodging$2,291.495
Food and Beverage$280.296

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
Biktarvy
Normalized: biktarvy
Drug Gilead Sciences, Inc. $18,446.06 15 2025
Source payment records
DOVATO
Normalized: dovato
Drug ViiV Healthcare Company $25.72 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
Biktarvy
biktarvy
2025 Biktarvy 2024 70
Beneficiary count suppressed
exact normalized Medicare Part D
DOVATO
dovato
2025 Dovato 2024 129 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
Gilead Sciences, Inc.
Exact reporting entity; no affiliate inference
2025 Biktarvy
open payments reported associated product
CMS Open Payments — General Payments
8065 supporting records · 2759 recipient NPIs · example record 1234350766
Biktarvy · 2024
Exact normalized brand match · 1 Part D row
70 suppressed by CMS
Gilead Sciences, Inc.
Exact reporting entity; no affiliate inference
2025 Descovy
open payments reported associated product
CMS Open Payments — General Payments
2032 supporting records · 589 recipient NPIs · example record 1234351196
Descovy · 2024
Exact normalized brand match · 1 Part D row
26 suppressed by CMS
ViiV Healthcare Company
Exact reporting entity; no affiliate inference
2025 DOVATO
open payments reported associated product
CMS Open Payments — General Payments
18732 supporting records · 3540 recipient NPIs · example record 1189508902
Dovato · 2024
Exact normalized brand match · 1 Part D row
129 14

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/Acetaminophen13714
DovatoDolutegravir Sodium/Lamivudine12914
BiktarvyBictegrav/Emtricit/Tenofov Ala70suppressed
Atorvastatin CalciumAtorvastatin Calcium4913
PrezcobixDarunavir/Cobicistat33suppressed
Tamsulosin HclTamsulosin Hcl33suppressed
GabapentinGabapentin3011
Metformin Hcl ErMetformin Hcl28suppressed
PifeltroDoravirine27suppressed
DescovyEmtricitabine/Tenofov Alafenam26suppressed
Amlodipine BesylateAmlodipine Besylate24suppressed
BaclofenBaclofen24suppressed
OdefseyEmtricitab/Rilpiviri/Tenof Ala22suppressed
JulucaDolutegravir/Rilpivirine21suppressed
Enalapril MaleateEnalapril Maleate20suppressed
Zolpidem TartrateZolpidem Tartrate20suppressed
Morphine Sulfate ErMorphine Sulfate18suppressed
TemazepamTemazepam18suppressed
Albuterol Sulfate HfaAlbuterol Sulfate15suppressed
Trazodone HclTrazodone Hcl15suppressed
Dextroamphetamine-AmphetamineDextroamphetamine/Amphetamine14suppressed
FinasterideFinasteride14suppressed
Fluticasone PropionateFluticasone Propionate14suppressed
Tizanidine HclTizanidine Hcl14suppressed
AlprazolamAlprazolam13suppressed
Hydroxyzine HclHydroxyzine Hcl13suppressed
GemfibrozilGemfibrozil12suppressed
GenvoyaElviteg/Cob/Emtri/Tenof Alafen12suppressed
JardianceEmpagliflozin12suppressed
Morphine SulfateMorphine Sulfate12suppressed
Sumatriptan SuccinateSumatriptan Succinate12suppressed
TivicayDolutegravir Sodium12suppressed
MaravirocMaraviroc11suppressed
Metoprolol SuccinateMetoprolol Succinate11suppressed
MirtazapineMirtazapine11suppressed
SymtuzaDarunavir/Cob/Emtri/Tenof Alaf11suppressed

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 $18,471.78 · 16 records Gilead Sciences, Inc. Biktarvy, DOVATO 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