Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Cassie Russ, MSW

Clinical Social Worker in Clearlake, CA · enumerated 2022 · practices at Lake County Office of Education.

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

National Provider Identifier

1891447637

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Registry record

Entity type Individual (Type 1)

Name Ms. Cassie Russ

Credential MSW

Sex Female

Practice address 6945 Old Highway 53, Clearlake, CA, 95422

Phone (707) 262-4100

Enumeration date Jan 24, 2022

Last updated in NPPES Aug 29, 2024

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

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

Is NPI 1891447637 active?

Yes, as of the latest NPPES snapshot, NPI 1891447637 is active (record last updated 2024-08-29).

How do I verify Cassie Russ's NPI record?

Cross-check NPI 1891447637 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-08-29.