Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Ana L Castillo

Nurse's Aide in Seattle, WA · enumerated 2023.

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

National Provider Identifier

1679349344

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Registry record

Entity type Individual (Type 1)

Name Ms. Ana L Castillo

Sex Female

Practice address 201 16th Ave E, Seattle, WA, 98112

Phone (206) 326-4545

Fax (206) 326-4555

Enumeration date Dec 4, 2023

Last updated in NPPES Dec 5, 2023

Taxonomy & licenses

376K00000X Nurse's Aide Nursing Service Related Providers · License 10100231 (WA) 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

What specialty is Ana Castillo?

Ana Castillo is registered in NPPES with the primary taxonomy of Nurse's Aide. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-12-05.