Has Brett Herzog, MD received payments from drug or device companies?

Yes. Drug and device makers reported $789 in general payments to Brett Herzog, MD across 12 transactions between 2019–2025. Most Open Payments records nationally are meals worth under $20; a reported payment is not evidence of wrongdoing.

Does a payment mean Brett Herzog, MD did something wrong?

No. Federal law requires drug and device makers to report almost every transfer of value to a physician, including a $14 sandwich at a lunch presentation. Consulting fees, research funding and royalties to device inventors are ordinary, legal parts of medicine. This site reports what was disclosed; it makes no allegation.

Where does this information about Brett Herzog, MD come from?

The U.S. Centers for Medicare & Medicaid Services. Payments come from Open Payments, published under the Physician Payments Sunshine Act. Billing and prescribing figures come from the Medicare Physician & Other Practitioners and Part D Prescriber public use files for 2024.

Brett Herzog, MD

Medical Oncology · Shiloh, ILNPI 1023499282

Payments from drug & device makers

What this record shows

This record is dominated by food and beverage: $550 of the $789 with a category attached, or 69.7%. It is spread thinly across 10 manufacturers, the largest accounting for just 18.6%. Reporting peaked in 2019 at $382 and has fallen 68.2% since, to $121 in 2025. That places this record below the midpoint for medical oncology clinicians in IL, where the typical reported total is $1,059.

$789in general payments, 2019–2025

Across 12 payments — averaging $65.75 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Galvanize Therapeutics, Inc$146
Genentech, Inc.$122
Exelixis Inc.$121
Astellas Pharma US Inc$100
Merck$99
Incyte Corporation$99
plus $101 from 4 others

$167,171in research payments, 2019–2025

Across 17 payments — averaging $9833.61 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.

AbbVie$167K

What the payments were for

Food & beverage$55070%
Education$23930%

Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.

General payments by program year

Who reported the general payments

Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.

Company	Payments	Total
Galvanize Therapeutics, Inc	2	$146
Genentech, Inc.	2	$122
Exelixis Inc.	1	$121
Astellas Pharma US Inc	1	$100
Merck	1	$99
Incyte Corporation	1	$99
Jazz Pharmaceuticals Inc.	1	$40
AbbVie	1	$29
Tempus AI, Inc	1	$16
Pharmacyclics LLC, An Abbvie Company	1	$16

What the payments were tied to

Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.

ALIYA SYSTEM$125
Cabometyx$121

How this compares

$789 in reported general payments places this provider in the 45th percentile of 144 medical oncology providers in Illinois.

See all medical oncology providers in Illinois →

Medicare billing

Part B allowed, 2024

$1,543,155

Medicare patients

204

Services billed

40,761

What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.

Most prescribed under Part D

Drug	Claims	Cost to plans & patients
TagrissoOsimertinib Mesylate	12	$222,563
EliquisApixaban	29	$16,976
Oxycodone Hcl	113	$2,253
Prochlorperazine Maleate	71	$1,874
Morphine Sulfate ErMorphine Sulfate	49	$1,816
Dexamethasone	117	$1,585
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen	23	$1,254
Levothyroxine Sodium	57	$536
Midodrine Hcl	12	$533
Ondansetron Hcl	56	$489
Triamcinolone Acetonide	27	$389
Ondansetron OdtOndansetron	14	$353
Lidocaine Hcl ViscousLidocaine Hcl	18	$252
Gabapentin	22	$246
Mirtazapine	16	$229

Paid to pharmacies, not to this prescriber.

Other medical oncology in Shiloh

Ruta RaoChicago$328K
Sunandana ChandraChicago$292K
William GradisharChicago$289K
Timothy KuzelOrland Park$265K
Devalingam MahalingamChicago$252K
Mary FidlerChicago$241K
James WallaceChicago$229K
Andrzej JakubowiakChicago$215K
Nicklas PfanzelterGlenview$199K
Jyoti PatelChicago$175K

See the full list for Illinois →

Where these figures come from

Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
Identity: NPPES NPI Registry, July 2026.

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