Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Crystal Rae Nielsen, MSW

Clinical Social Worker in Crescent City, CA · enumerated 2023.

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

National Provider Identifier

1609554765

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Registry record

Entity type Individual (Type 1)

Name Crystal Rae Nielsen

Credential MSW

Sex Female

Practice address 5905 Lake Earl Dr, Crescent City, CA, 95532

Phone (707) 954-6141

Enumeration date Jul 10, 2023

Last updated in NPPES Apr 22, 2026

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 138105 (CA) 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 Crystal Nielsen practice?

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

What is the NPI number for Crystal Nielsen?

The National Provider Identifier (NPI) for Crystal Nielsen is 1609554765, 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 2026-04-22.