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

Dr. Leonard A Farber, MD

Individual provider Radiation Oncology Physician · NPI 1639185838

Dr. Leonard A Farber, MD is a Radiation Oncology Physician in Fullerton, California. Practices as a sole proprietor and works from 3 locations. Licensed in California and New York.

Licensed in
CA, NY
In the registry since
2006
Specialties on file
2
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

2151 N Harbor Blvd Ste 1500
Fullerton, CA 92835-3823
Phone: (714) 446-5632
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 21 West Broadway, New York, NY 10007 — (212) 300-0663
  • 21 West Broadway, New York, NY 10007 — (212) 300-0663

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence C153081 (CA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 210306 (NY)

Record details

NPI number1639185838
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 31, 2006
Last updated in NPPESApril 10, 2018

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