Physician profile

Brian John Leberthon

Hematology & Oncology · West Covina, CA

NPI 1326023979

$37,024.96

in general payments reported to CMS, 2019-2025

89 companies · $6,218 in 2025

The $6,218 reported for 2025 was more than what 84% of Hematology & Oncology providers received nationally (typical 2025 total: $686).

See the full distribution for Hematology & Oncology

Payments by year

General 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)
Food and Beverage$17,314.92
Education$758.88
Compensation For Services Other Than Consulting, Including Serving As Faculty Or As A Speaker At A Venue Other Than A Continuing Education Program$208.34
Long Term Medical Supply Or Device Loan$166.66

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. Product names cover 2023-2025.

CompanyGeneral paymentsYearsTop products
Astrazeneca Pharmaceuticals LP $4,395.24 2019-2025 Imfinzi, Calquence, Tagrisso
Novartis Pharmaceuticals Corporation $2,704.69 2019-2025
E.R. Squibb & Sons, L.L.C. $2,205.98 2019-2025 Opdivo, Opdualag
Incyte Corporation $2,203.16 2019-2025 Jakafi, Monjuvi, Pemazyre
Janssen Biotech, INC. $1,676.84 2019-2025 Erleada, Darzalex, Talvey
Celgene Corporation $1,601.57 2019-2025 Pomalyst, Reblozyl, Pomalyst
Amgen INC. $1,522.67 2019-2025 Evenity, Prolia, Prolia
Pfizer INC. $1,436.47 2019-2025
Genzyme Corporation $1,319.79 2019-2025
Puma Biotechnology, INC. $1,289.81 2019-2025
Alexion Pharmaceuticals, INC. $1,118.73 2019-2025 Ultomiris
Daiichi Sankyo INC. $1,094.89 2021-2025 Enhertu, Vanflyta, Injectafer
Merck Sharp & Dohme LLC $1,062.76 2019-2025 Keytruda, Welireg, Keytruda Qlex
Gilead Sciences, INC. $951.49 2019-2025 Trodelvy
Genentech USA, INC. $747.10 2019-2024 Venclexta, Tecentriq, Alecensa
Show all 88 companies
CompanyGeneral paymentsYearsTop products
Karyopharm Therapeutics INC. $656.02 2020-2025 Xpovio
Pharmacyclics LLC, An Abbvie Company $597.97 2019-2023 Imbruvica, Epkinly
Glaxosmithkline, LLC. $552.04 2020-2025 Zejula, Jemperli, Ojjaara
Seagen INC. $530.34 2020-2025 Adcetris, Padcev, Tivdak
Takeda Pharmaceuticals U.S.A., INC. $519.56 2019-2024 Iclusig, Ninlaro, Fruzaqla
Jazz Pharmaceuticals INC. $491.61 2020-2025
Bayer Healthcare Pharmaceuticals INC. $463.59 2019-2025
Lilly USA, LLC $463.11 2019-2025 Jaypirca, Verzenio
Foundation Medicine, INC. $410.03 2019-2023
Acrotech Biopharma INC. $385.07 2021-2024 Beleodaq
Emd Serono, INC. $362.79 2019-2025 Bavencio
Abbvie INC. $331.47 2019-2025
Pharmaessentia USA Corporation $313.09 2022-2025 Besremi
Tersera Therapeutics LLC $286.71 2020-2025 Zoladex
Array Biopharma INC $268.78 2020-2025 Mektovi, Braftovi, Tukysa
Taiho Oncology, INC. $267.91 2019-2024
Astellas Pharma US INC $256.96 2019-2025 Vyloy, Padcev
Eisai INC. $228.86 2020-2025
Aveo Pharmaceuticals, INC. $228.10 2022-2025 Fotivda
Spectrum Pharmaceuticals INC. $219.33 2024-2025 Rolvedon
Agios Pharmaceuticals, INC. $208.47 2020-2025 Pyrukynd
Stemline Therapeutics INC. $184.21 2019-2025 Orserdu, Elzonris
Boehringer Ingelheim Pharmaceuticals, INC. $183.41 2019-2025 Gilotrif
Dendreon Pharmaceuticals LLC $177.59 2019-2025 Provenge
Coherus Oncology, INC. $169.87 2023-2025 Loqtorzi
Exelixis INC. $150.51 2019-2022
Sobi, INC $136.82 2021-2025
Rigel Pharmaceuticals, INC. $134.28 2022-2025 Rezlidhia, Tavalisse, Gavreto
Regeneron Healthcare Solutions, INC. $109.81 2020-2025 Libtayo
Beigene USA, INC. $105.66 2022-2024 Brukinsa
Ipsen Biopharmaceuticals, INC $103.22 2021-2025 Somatuline Depot, Onivyde
Janssen Scientific Affairs, LLC $102.18 2022
Novocure INC. $101.38 2021-2025 Optune, Optune Gio
Mirati Therapeutics, INC. $98.54 2023-2024 Krazati
Immunocore Limited $97.31 2023 Kimmtrak
Verastem, INC. $91.08 2019
Sumitomo Pharma America, INC. $88.25 2023-2025 Orgovyx
Genmab U.S., INC. $85.07 2023-2025 Epkinly
Kyowa Kirin, INC. $83.50 2019-2025 Poteligeo
Partner Therapeutics, INC. $82.10 2019-2020
Tesaro, INC. $76.86 2019
Azurity Pharmaceuticals, INC. $76.64 2025 Danziten
Myovant Sciences INC. $74.91 2021-2022
Immunogen, INC. $69.75 2023-2024 Elahere, Elahere
Clovis Oncology, INC. $68.20 2020
Janssen Pharmaceuticals, INC $67.45 2019-2024 Xarelto
Eusa Pharma (US) LLC $65.62 2020-2022
Secura Bio, INC. $64.62 2020
Epizyme, INC. $63.54 2020-2021
Alnylam Pharmaceuticals INC. $58.73 2021-2023 Onpattro
Legend Biotech USA INC. $56.80 2024-2025 Carvykti
Ge Healthcare $50.94 2021-2025
Otsuka America Pharmaceutical, INC. $50.00 2024 Jynarque
Kite Pharma, INC. $46.85 2021-2023
Syndax Pharmaceuticals, INC. $44.81 2025
Teva Pharmaceuticals USA, INC. $43.62 2019
Dova Pharmaceuticals $40.05 2020-2021
Mylan Institutional INC. $38.73 2020-2022
Deciphera Pharmaceuticals INC. $36.39 2021
Boston Scientific Corporation $27.78 2025 General - Pain Management
Adc Therapeutics America, INC. $23.64 2023
Adaptive Biotechnologies Corporation $23.05 2022
Pharmacosmos Therapeutics INC. $21.05 2024 Cosela
Sanofi-Aventis U.S. LLC $20.52 2020
Global Blood Therapeutics, INC. $20.31 2022
Accord Healthcare, INC. $20.22 2025
West Therapeutics Development, LLC $20.14 2020
Caris Mpi, INC. $19.76 2025 Mi Cancer Seek
Helsinn Therapeutics (U.S.), INC. $19.65 2019
Morphosys, US INC. $17.81 2023 Monjuvi
Aurobindo Pharma USA, INC. $13.86 2020
Menarini Silicon Biosystems, INC. $13.50 2024
Immunomedics, INC. $11.37 2020

1 company 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.

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Payment summary

Brian John Leberthon

$37,024.96

in general payments reported 2019-2025

Years
2019-2025
Top company
Astrazeneca Pharmaceuticals LP
Context
The $6,218 reported for 2025 was more than what 84% of Hematology & Oncology providers received nationally (typical 2025 total: $686).

https://glasscript.com/doctor/241091/brian-john-leberthon

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.