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STEPHEN JAMES SIMKO III MD
NPI 1861539124
Pediatrics - Pediatric Hematology-Oncology in Palo Alto, CA

Active since January 30, 2007
725 WELCH RD, PALO ALTO, CA 94304(650) 497-8000 Get Directions Write a Review

NPPES record last updated: April 16, 2024. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 16, 2024, Feb 8, 2016, Oct 1, 2015 (3 updates tracked since 2015).

About Stephen James Simko Iii Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

STEPHEN JAMES SIMKO III MD (NPI 1861539124) is an individual pediatric hematology-oncology provider in Palo Alto, California, licensed in California (C138486) and active in the NPI registry since January 2007.

NPPES Registry Identity

NPI1861539124
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameSTEPHEN JAMES SIMKO IIICredential: MD
Location Address725 WELCH RDPalo Alto, CA 94304-1601
Mailing Address725 Welch RdPalo Alto, CA 94304-1601 · (650) 497-8000
Phone(650) 497-8000
Sole ProprietorNo
Enumeration DateJanuary 30, 2007
Last NPPES UpdateApril 16, 20243 updates tracked since enumeration
NPPES CertifiedApril 16, 2024
✔ NPI 1861539124 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in CA · C138486
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
Also ListedPediatricsTaxonomy 208000000X · License C138486 (CA)
725 WELCH RD, Palo Alto, CA 94304
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

EIRI INENAGA MS, OTR/L
Occupational Therapist (Pediatrics)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8218
WENDY LEIGH ADAMS ARNP
Nurse Practitioner (Neonatal)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
KEVIN WEI-HAN CHI MD
Pediatrics
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
ASHEEN RAMA MD
Anesthesiology (Pediatric Anesthesiology)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
CRYSTAL LEE MACKALL MD
Pediatrics (Pediatric Hematology-Oncology)
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
KRISTI LYNNE O'CONNOR OT
Occupational Therapist
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
LAUREN GENNA ROOS NP
Nurse Practitioner
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000
SHALINI MITTAL MD
Hospitalist
725 WELCH RD
PALO ALTO, CA 94304
Santa Clara County (650) 497-8000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stephen Simko's NPI number?

The NPI number for Stephen Simko is 1861539124. It was assigned to this individual provider in the NPPES registry on January 30, 2007.

Where is Stephen Simko located?

Stephen Simko practices at 725 Welch Rd, Palo Alto, CA 94304. The listed phone number is (650) 497-8000.

What is Stephen Simko's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

When was this NPI record last updated?

The NPPES record for Stephen Simko was last updated on April 16, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.