Has John Chapin, MD received payments from drug or device companies?

Yes. Drug and device makers reported $420 in general payments to John Chapin, MD across 11 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 John Chapin, 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 John Chapin, 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.

John Chapin, MD

Neurology · Spokane, WANPI 1245246990

Payments from drug & device makers

$420in general payments, 2019–2025

Across 11 payments — averaging $38.16 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Amgen$152
Amylyx Pharmaceuticals, Inc.$117
Argenx US, Inc.$55
Sobi, Inc$40
UCB, Inc.$30
Sanofi Pasteur Inc.$14
plus $12 from 1 others

What the payments were for

Food & beverage$35083%
Education$7017%

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
Amgen	3	$152
Amylyx Pharmaceuticals, Inc.	1	$117
Argenx US, Inc.	1	$55
Sobi, Inc	2	$40
UCB, Inc.	2	$30
Sanofi Pasteur Inc.	1	$14
Supernus Pharmaceuticals, 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.

RELYVRIO$117

How this compares

$420 in reported general payments places this provider in the 50th percentile of 418 neurology providers in Washington.

See all neurology providers in Washington →

Medicare billing

Part B allowed, 2024

$116,347

Medicare patients

215

Services billed

8,386

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
FirdapseAmifampridine Phosphate	12	$528,704
Riluzole	85	$9,471
Mycophenolate Mofetil	65	$6,898
Pyridostigmine Bromide	38	$2,361
Azathioprine	29	$1,908
Mexiletine Hcl	27	$1,127
Midodrine Hcl	11	$820
Gabapentin	35	$793
Baclofen	24	$761
Prednisone	53	$496
Duloxetine Hcl	12	$298
Pregabalin	11	$256
Lorazepam	35	$175
Tramadol Hcl	17	$103
Citalopram HbrCitalopram Hydrobromide	29	$54

Paid to pharmacies, not to this prescriber.

Other neurology in Spokane

Jason AldredSpokane$9.5M
David GreeleySpokane$8.5M
Steven PughSpokane$628K
Jessica CraddockSpokane$528K
Yi MaoSpokane$98K
Luis ParySpokane$64K
Pinky AgarwalKirkland$5.4M
Pavle RepovicSeattle$4.8M
James BowenKirkland$2.3M
Michael RosenbloomSeattle$1.8M

See the full list for Washington →

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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