Has Brian Knapp, MD received payments from drug or device companies?

Yes. Drug and device makers reported $1,362 in general payments to Brian Knapp, MD across 55 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 Brian Knapp, 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 Brian Knapp, 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.

Brian Knapp, MD

Physical Medicine & Rehabilitation · Green Bay, WINPI 1730200395

Payments from drug & device makers

What this record shows

Almost everything reported here is food and beverage — 99.1% of the total across 55 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 20 manufacturers reported payments, led by Ipsen Biopharmaceuticals, Inc at 26.9% of the total. Reporting peaked in 2019 at $331 and has fallen 67.1% since, to $109 in 2024.

$1,362in general payments, 2019–2025

Across 55 payments — averaging $24.76 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Ipsen Biopharmaceuticals, Inc$366
Piramal Critical Care$224
AbbVie$191
Novartis$145
Merz Pharmaceuticals, LLC$58
Merz North America, Inc.$48
plus $328 from 14 others

What the payments were for

Speaking & faculty fees$121%
Food & beverage$1,35099%

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
Ipsen Biopharmaceuticals, Inc	6	$366
Piramal Critical Care	8	$224
AbbVie(2 entities)	10	$191
Novartis	7	$145
Merz Pharmaceuticals, LLC	2	$58
Merz North America, Inc.	3	$48
AstraZeneca	2	$36
Neurocrine Biosciences, Inc.	2	$33
Johnson & Johnson	1	$32
Lilly USA, LLC	2	$32
Saol Therapeutics Inc.	2	$30
Acorda Therapeutics, Inc	2	$26
CSL Behring	1	$25
Argenx US, Inc.	1	$22
Acadia Pharmaceuticals Inc	1	$19
Teva Pharmaceuticals USA, Inc.	1	$17
Tanabe Pharma America, Inc.	1	$16
Medtronic	1	$15
Vertical Pharmaceuticals, LLC	1	$13
Eisai Inc.	1	$12

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.

DYSPORT$326

How this compares

$1,362 in reported general payments places this provider in the 85th percentile of 207 physical medicine & rehabilitation providers in Wisconsin.

See all physical medicine & rehabilitation providers in Wisconsin →

Medicare billing

Part B allowed, 2024

$336,627

Medicare patients

284

Services billed

38,264

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
Fentanyl	18	$2,075
Oxycodone-AcetaminophenOxycodone Hcl/Acetaminophen	23	$1,227
Hydrocodone-AcetaminophenHydrocodone/Acetaminophen	27	$1,130
Baclofen	49	$1,009
Gabapentin	60	$934
Pregabalin	48	$537
Celecoxib	16	$273
Diazepam	27	$212
Duloxetine Hcl	11	$43
Cyclobenzaprine Hcl	11	$39
Amlodipine Besylate	11	$8

Paid to pharmacies, not to this prescriber.

Other physical medicine & rehabilitation in Green Bay

Eric DvorakGreen Bay$3K
Hazel MathesGreen Bay$1K
Danzhu GuoGreen Bay$638
Xinqian ChenGreen Bay$511
Jason SchaveGreen Bay$385
Nicholas KetchumMilwaukee$573K
Christopher CronsellMilwaukee$353K
Karin GoodfriendMilwaukee$191K
John McGuireMilwaukee$75K
Erin McGonigleMilwaukee$66K

See the full list for Wisconsin →

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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