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

County of Sonoma

Q: 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.

Clinic/Center in Santa Rosa, CA · enumerated 2023 · authorized official Shannon Rasmussen, 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 2300 County Center Dr Ste A120, Santa Rosa, CA, 95403

Phone (707) 565-7831

Enumeration date Jun 16, 2023

Last updated in NPPES Aug 11, 2026

Taxonomy & classification

261Q00000X Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Shannon Rasmussen

Title Department Analyst

Phone (707) 565-7831

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

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 Shannon Rasmussen (Department Analyst) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-11.