Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Hilary Arnzen

Case Manager/Care Coordinator in Kennewick, WA · enumerated 2018 · practices at Lutheran Community Services Northwest.

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

National Provider Identifier

1265909675

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Registry record

Entity type Individual (Type 1)

Name Hilary Arnzen

Sex Male

Practice address 3321 W Kennewick Ave Ste 150, Kennewick, WA, 99336

Phone (509) 735-6446

Enumeration date Oct 24, 2018

Last updated in NPPES Oct 24, 2018

Taxonomy & licenses

171M00000X Case Manager/Care Coordinator Other 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

Where does Hilary Arnzen practice?

The practice location on file with NPPES is in Kennewick, WA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Hilary Arnzen?

The National Provider Identifier (NPI) for Hilary Arnzen is 1265909675, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-24.