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WILLIAM G. KEYSER MD
NPI 1306859194
Emergency Medicine in Sonoma, CA

Active since August 14, 2006
347 ANDRIEUX STREET, SONOMA, CA 95476(707) 935-5100 Get Directions Write a Review

NPPES record last updated: July 2, 2008. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William G. Keyser Md NPPES

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

WILLIAM G. KEYSER MD (NPI 1306859194) is an individual emergency medicine provider in Sonoma, California, licensed in California (C32412) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1306859194
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameWILLIAM G. KEYSERCredential: MD
Location Address347 ANDRIEUX STREETSonoma, CA 95476-6811
Mailing AddressP.o. Box 10609Westminster, CA 92685-0609 · (877) 818-6100
Phone(707) 935-5100
Sole ProprietorNo
Enumeration DateAugust 14, 2006
Last NPPES UpdateJuly 2, 2008
✔ NPI 1306859194 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · C32412
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
347 ANDRIEUX STREET, Sonoma, CA 95476
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Other Identifiers 4

Medicare PIN00C324122CA
Medicaid00C324120CA
Medicare PIN00C324123CA
Medicare UPINA34923CA

Other Providers at the Same Location NPPES 4

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

MARK GORTON WILLS MD
Emergency Medicine
347 ANDRIEUX STREET
SONOMA, CA 95476
Sonoma County (707) 935-5100
JAY W. GOLDBERG MD
Emergency Medicine
347 ANDRIEUX STREET
SONOMA, CA 95476
Sonoma County (707) 935-5100
SONOMA VALLEY EMERGENCY PHYSICIANS MEDICAL GROUP, INC.
Emergency Medicine
347 ANDRIEUX STREET
SONOMA, CA 95476
Sonoma County (707) 935-5100
STEPHEN ALEXANDER KAHN MD
Emergency Medicine
347 ANDRIEUX STREET
SONOMA, CA 95476
Sonoma County (707) 935-5100

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 William Keyser's NPI number?

The NPI number for William Keyser is 1306859194. It was assigned to this individual provider in the NPPES registry on August 14, 2006.

Where is William Keyser located?

William Keyser practices at 347 Andrieux Street, Sonoma, CA 95476. The listed phone number is (707) 935-5100.

What is William Keyser's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

When was this NPI record last updated?

The NPPES record for William Keyser was last updated on July 2, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.