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County of Sonoma

Clinic/Center in Petaluma, CA · enumerated 2017 · authorized official Ruby Zhang, Department Analyst.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1427563261

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Registry record

Entity type Organization (Type 2)
Legal business name County of Sonoma
Other name <Unavail>
Practice address 1355 Industrial Ave, Petaluma, CA, 94952
Phone (707) 565-8188
Fax (707) 565-8190
Enumeration date Dec 1, 2017
Last updated in NPPES May 23, 2023

Taxonomy & classification

261Q00000X Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Ruby Zhang
Title Department Analyst
Phone (707) 565-7846

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for County of Sonoma?
NPPES lists Ruby Zhang (Department Analyst) as the authorized official for this organization.
What is the NPI number for County of Sonoma?
The NPI for County of Sonoma is 1427563261, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-23.