Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Brian J Leberthon, MD

Individual provider Hematology & Oncology Physician · NPI 1326023979

Dr. Brian J Leberthon, MD is a Hematology/Oncology in West Covina, California. Graduated from University of Southern California Keck School of Medicine in 1993, 33 years ago. Accepts Medicare assignment. Licensed in California.

Years since qualifying
33
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1135 S Sunset Ave Ste # 207
West Covina, CA 91790-3937
Phone: (626) 338-9560
Fax: (626) 338-9360
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence G79934 (CA)

Record details

NPI number1326023979
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 7, 2005
Last updated in NPPESDecember 14, 2016

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1993 (33 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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