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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

BRIAN KESELYAK
NPI 1154237709
Registered Nurse - Emergency in Walnut Creek, CA

Active since August 24, 2026
1601 YGNACIO VALLEY RD, WALNUT CREEK, CA 94598(925) 939-5800 Get Directions Write a Review

NPPES record added: August 24, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Brian Keselyak NPPES

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

BRIAN KESELYAK (NPI 1154237709) is an individual emergency provider in Walnut Creek, California, licensed in California (95227210) and active in the NPI registry since August 2026.

NPPES Registry Identity

NPI1154237709
Entity TypeIndividualMale
Primary Taxonomy163WE0003X
Provider Legal NameBRIAN KESELYAK
Location Address1601 YGNACIO VALLEY RDWalnut Creek, CA 94598-3122
Mailing Address1601 Ygnacio Valley RdWalnut Creek, CA 94598-3122 · (925) 939-5800
Phone(925) 939-5800
Sole ProprietorNo
Enumeration DateAugust 24, 2026
NPPES CertifiedAugust 23, 2026
✔ NPI 1154237709 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRegistered Nurse · EmergencyNursing Service Providers
Taxonomy Code163WE0003X
License✔ Licensed in CA · 95227210
1601 YGNACIO VALLEY RD, Walnut Creek, CA 94598
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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.

MALCOLM C JOHNSON MD
Emergency Medicine
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-3000
KEVIN GEORGE KAISER MD
Anesthesiology
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-3000
DAVID CURTIS FITZGERALD MD
Anesthesiology
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-3000
MOUSSA F YAZBECK MD INC
Personal Emergency Response Attendant
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (479) 806-5319
IMRAN SAEED KHAN MD
Pediatrics (Neonatal-Perinatal Medicine)
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (925) 947-5350
HAYWON LIEH MD
Anesthesiology
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-3000
ALICE DECKER HUNTER M.D.
Emergency Medicine
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-3000
DAVID AARON SHAPIRO MD
Anesthesiology
1601 YGNACIO VALLEY RD
WALNUT CREEK, CA 94598
Contra Costa County (925) 939-3000

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 Brian Keselyak's NPI number?

The NPI number for Brian Keselyak is 1154237709. It was assigned to this individual provider in the NPPES registry on August 24, 2026.

Where is Brian Keselyak located?

Brian Keselyak practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. The listed phone number is (925) 939-5800.

What is Brian Keselyak's specialty?

The primary specialty registered for this NPI is Registered Nurse, specializing in Emergency, with taxonomy code 163WE0003X.

When was this NPI record last updated?

The NPPES record for Brian Keselyak was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 days 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.