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Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

County of Sonoma

Clinic/Center in Santa Rosa, CA · enumerated 2023 · authorized official Ruby Zhang, Department Analyst.

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

National Provider Identifier

1255016366

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Registry record

Entity type Organization (Type 2)
Legal business name County of Sonoma
Parent organization County of Sonoma
Practice address 2400a County Center Dr, Santa Rosa, CA, 95403
Phone (707) 565-7846
Enumeration date Jun 16, 2023
Last updated in NPPES Jun 16, 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.

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Frequently asked questions

What is the NPI number for County of Sonoma?
The NPI for County of Sonoma is 1255016366, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for County of Sonoma?
NPPES lists Ruby Zhang (Department Analyst) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-16.