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Riverside County Dept Mental Health

Health Maintenance Organization in Riverside, CA · enumerated 2012 · authorized official Nathaniel Tollefson, Supervisor.

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

National Provider Identifier

1386980555

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Registry record

Entity type Organization (Type 2)
Legal business name Riverside County Dept Mental Health
Practice address 1777 Atlanta Ave Ste G1, Riverside, CA, 92507
Phone (951) 778-3504
Enumeration date Dec 17, 2012
Last updated in NPPES Dec 17, 2012

Taxonomy & classification

302R00000X Health Maintenance Organization Managed Care Organizations · License HO502091228 (CA) Primary

Authorized official

Name Nathaniel Tollefson
Title Supervisor
Phone (951) 778-3504

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

Who is the authorized official for Riverside County Dept Mental Health?
NPPES lists Nathaniel Tollefson (Supervisor) as the authorized official for this organization.
What is the NPI number for Riverside County Dept Mental Health?
The NPI for Riverside County Dept Mental Health is 1386980555, 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 2012-12-17.