Physician profile

Matthew G Mei

Hematology (Internal Medicine) · Duarte, CA

NPI 1104069269

$41,140.52

in general payments reported to CMS, 2019-2025

24 companies · $313 in 2025

The $313 reported for 2025 was less than what a typical Hematology (Internal Medicine) provider received nationally (typical 2025 total: $1,177).

See the full distribution for Hematology (Internal Medicine)

Payments by year

General and research payments by program year, as reported to CMS.

What the payments were for

Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.

View as a table
Payment typeAmount (2023-2025)
Compensation For Services Other Than Consulting, Including Serving As Faculty Or As A Speaker At A Venue Other Than A Continuing Education Program$12,745.00
Consulting Fee$4,630.00
Food and Beverage$1,366.59
Travel and Lodging$675.85

Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.

Who reported paying

General payments only, as reported to CMS. Research payments are listed separately below. Product names cover 2023-2025.

CompanyGeneral paymentsYearsTop products
Seagen INC. $23,483.56 2022-2023 Adcetris, Tukysa
Novartis Pharmaceuticals Corporation $6,525.97 2022-2025 Kymriah
Genzyme Corporation $3,730.15 2019-2024
Incyte Corporation $2,767.50 2021-2022
Astrazeneca Uk Limited $2,055.00 2023
Janssen Global Services, LLC $2,020.00 2021
Janssen Scientific Affairs, LLC $150.00 2024 Talvey
Astrazeneca Pharmaceuticals LP $103.83 2019-2025 Calquence
Celgene Corporation $79.08 2023-2024 Reblozyl
Helsinn Therapeutics (U.S.), INC. $42.29 2023-2025 Valchlor
Abbvie INC. $38.98 2025
Lilly USA, LLC $33.35 2025 Jaypirca
Genmab U.S., INC. $26.18 2025 Epkinly
Takeda Pharmaceuticals U.S.A., INC. $23.97 2023 Iclusig
Kite Pharma, INC. $22.81 2025 Yescarta
Show all 17 companies
CompanyGeneral paymentsYearsTop products
Alexion Pharmaceuticals, INC. $22.67 2024 Ultomiris
Rigel Pharmaceuticals, INC. $15.18 2025 Tavalisse, Rezlidhia, Gavreto

7 companies reported research payments only; those appear in the research section below.

Drugs and devices associated with these payments

CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.

Research and ownership

$2,000.20 in research payments reported 2019-2025. Research payments are often institution-directed and tied to clinical trials: they are reported under a clinician's name but frequently go to a hospital or research organization, and usually reflect participation in medical research.

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Payment summary

Matthew G Mei

$41,140.52

in general payments reported 2019-2025

Years
2019-2025
Top company
Seagen INC.
Context
The $313 reported for 2025 was less than what a typical Hematology (Internal Medicine) provider received nationally (typical 2025 total: $1,177).

https://glasscript.com/doctor/4252/matthew-g-mei

Source: CMS Open Payments, program years 2019-2025. Payments are legal and often routine.

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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.