Healthcare provider profile · identity verified

Patrick Joseph Cahill, M.D.

Allopathic & Osteopathic Physicians|General Practice · NORWICH, CT · NPI 1578884698

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 Patrick Joseph Cahill, M.D. received $424.13 in general payments during 2025 across 16 reported records.

Gilead Sciences, Inc. accounted for 96.0% of that reported general-payment amount.

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

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

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 86 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 13 claims for Descovy by this doctor in 2024.

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

Payment overview · 2025

General Payments

$424.13

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 $407.0296.0%152025
MILLICENT US INC Unresolved — no canonical attribution shown $17.114.0%12025

What were the payments for?

Payment categories

CategoryAmountRecords
Food and Beverage$424.1316

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. $148.64 4 2025
Source payment records
FEMLYV
Normalized: femlyv
Drug MILLICENT US INC $17.11 1 2025
Source payment records
INTRAROSA
Normalized: intrarosa
Drug MILLICENT US INC $17.11 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 86 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
86 15
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
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
BiktarvyBictegrav/Emtricit/Tenofov Ala8615
Albuterol Sulfate HfaAlbuterol Sulfate7715
Atorvastatin CalciumAtorvastatin Calcium7419
JulucaDolutegravir/Rilpivirine70suppressed
TivicayDolutegravir Sodium57suppressed
DovatoDolutegravir Sodium/Lamivudine53suppressed
Pravastatin SodiumPravastatin Sodium52suppressed
Bupropion Hcl SrBupropion Hcl4917
Amlodipine BesylateAmlodipine Besylate39suppressed
LisinoprilLisinopril39suppressed
OdefseyEmtricitab/Rilpiviri/Tenof Ala39suppressed
GabapentinGabapentin38suppressed
ValacyclovirValacyclovir Hcl33suppressed
Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim31suppressed
Methenamine HippurateMethenamine Hippurate30suppressed
MirtazapineMirtazapine30suppressed
FenofibrateFenofibrate Nanocrystallized28suppressed
FamotidineFamotidine26suppressed
SymtuzaDarunavir/Cob/Emtri/Tenof Alaf26suppressed
Trazodone HclTrazodone Hcl25suppressed
Hydroxyzine HclHydroxyzine Hcl24suppressed
Varenicline TartrateVarenicline Tartrate23suppressed
Diclofenac SodiumDiclofenac Sodium22suppressed
JanuviaSitagliptin Phosphate22suppressed
Pantoprazole SodiumPantoprazole Sodium22suppressed
PrezcobixDarunavir/Cobicistat21suppressed
JardianceEmpagliflozin20suppressed
Losartan PotassiumLosartan Potassium20suppressed
Montelukast SodiumMontelukast Sodium20suppressed
PregabalinPregabalin20suppressed
Tamsulosin HclTamsulosin Hcl20suppressed
TriumeqAbacavir/Dolutegravir/Lamivudi20suppressed
CabenuvaCabotegravir/Rilpivirine19suppressed
Fluticasone PropionateFluticasone Propionate18suppressed
ChlorthalidoneChlorthalidone17suppressed
AmoxicillinAmoxicillin1611
Metoprolol SuccinateMetoprolol Succinate15suppressed
Quetiapine FumarateQuetiapine Fumarate15suppressed
CefdinirCefdinir14suppressed
Escitalopram OxalateEscitalopram Oxalate14suppressed
Lantus SolostarInsulin Glargine,hum.Rec.Anlog14suppressed
OmeprazoleOmeprazole14suppressed
Betamethasone DipropionateBetamethasone Dipropionate13suppressed
DapsoneDapsone13suppressed
DescovyEmtricitabine/Tenofov Alafenam13suppressed
Doxycycline HyclateDoxycycline Hyclate1311
Prazosin HclPrazosin Hcl13suppressed
SynthroidLevothyroxine Sodium13suppressed
Valsartan-HydrochlorothiazideValsartan/Hydrochlorothiazide13suppressed
AllopurinolAllopurinol12suppressed
Efavirenz-Emtric-Tenofov DisopEfavirenz/Emtricit/Tenofovr Df12suppressed
Fluoxetine HclFluoxetine Hcl12suppressed
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen12suppressed
OzempicSemaglutide12suppressed
Quetiapine Fumarate ErQuetiapine Fumarate12suppressed
Sertraline HclSertraline Hcl12suppressed
Warfarin SodiumWarfarin Sodium12suppressed
FluconazoleFluconazole11suppressed
LamivudineLamivudine11suppressed
Metformin HclMetformin Hcl11suppressed
QnaslBeclomethasone Dipropionate11suppressed
Tramadol HclTramadol Hcl11suppressed
TrulicityDulaglutide11suppressed

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 $424.13 · 16 records Gilead Sciences, Inc. Biktarvy, FEMLYV, INTRAROSA 2
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