Has Kwun Wen, MD received payments from drug or device companies?

Yes. Drug and device makers reported $142,813 in general payments to Kwun Wen, MD across 20 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 Kwun Wen, 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 Kwun Wen, 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.

Kwun Wen, MD

Clinical Pathology/Laboratory Medicine · San Francisco, CANPI 1326307430

Payments from drug & device makers

What this record shows

This record is dominated by consulting fees: $142,813 of the $142,813 with a category attached, or 100.0%. Every reported general payment came from a single manufacturer, Exact Sciences. Reporting peaked in 2023 at $99,500 and has fallen 56.6% since, to $43,175 in 2025. Among clinical pathology/laboratory medicine clinicians in CA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.

$142,813in general payments, 2019–2025

Across 20 payments — averaging $7140.63 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

Exact Sciences$143K

What the payments were for

Consulting fees$142,813100%

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
Exact Sciences	20	$142,813

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.

Cologuard Collection Kit$80,425
The Cologuard Plus Collection Kit$43,175

How this compares

$142,813 in reported general payments places this provider in the 95th percentile of 58 clinical pathology/laboratory medicine providers in California.

See all clinical pathology/laboratory medicine providers in California →

Medicare billing

Part B allowed, 2024

$76,478

Medicare patients

581

Services billed

1,865

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.

Other clinical pathology/laboratory medicine in San Francisco

Michael BuschSan Francisco$24K
Steven MillerSan Francisco$7K
Jayanta DebnathSan Francisco$4K
Ari MolofskySan Francisco$3K
Bonnie BalzerSan Francisco$2K
Anne DeucherSan Francisco$1K
Elham KhanafsharSan Francisco$587
David ParkSan Francisco$344
Maria PatinoSan Francisco$297
John MorettoSan Francisco$51

See the full list for California →

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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