Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Cathy Ishizu

Registered Nurse in Santa Rosa, CA · enumerated 2009.

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

National Provider Identifier

1336379551

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Registry record

Entity type Individual (Type 1)

Name Cathy Ishizu

Sex Female

Practice address 625 5th St, Santa Rosa, CA, 95404

Phone (707) 565-4449

Enumeration date Jul 22, 2009

Last updated in NPPES Jul 22, 2009

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 288862 (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.

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Frequently asked questions

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.

What specialty is Cathy Ishizu?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-07-22.