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

Stephen James Simko III, MD

Individual provider Pediatrics Physician · NPI 1861539124

Stephen James Simko III, MD is a Pediatrics Physician in Palo Alto, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
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

725 Welch Rd
Palo Alto, CA 94304-1601
Phone: (650) 497-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Hematology & Oncology Physician (primary) Taxonomy 2080P0207X · Licence C138486 (CA)
Pediatrics Physician Taxonomy 208000000X · Licence C138486 (CA)

Record details

NPI number1861539124
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 30, 2007
Last updated in NPPESApril 16, 2024
Certification dateApril 16, 2024

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