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

Individual provider Hematology (Internal Medicine) Physician · NPI 1801822499

Dr. Katherine K. Matthay, MD is a Hematology (Internal Medicine) Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
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

505 Parnassus Ave
San Francisco, CA 94143-2204
Phone: (415) 476-3831
Fax: (415) 502-4372
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Specialties & licences

Pediatrics Physician (primary) Taxonomy 208000000X · Licence G33559 (CA)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence G33559 (CA)

Record details

NPI number1801822499
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 24, 2006
Last updated in NPPESJuly 13, 2026

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