NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Miss Katherine Mary Onstott, C.N.S

Gerontology Clinical Nurse Specialist in San Jose, CA · enumerated 2007.

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

National Provider Identifier

1699964163

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Registry record

Entity type Individual (Type 1)
Name Miss Katherine Mary Onstott
Credential C.N.S
Sex Female
Practice address San Jose, CA, 95119
Phone (408) 972-6301
Fax (408) 972-6759
Enumeration date Oct 19, 2007
Last updated in NPPES Oct 19, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

364SG0600X Gerontology Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 2801 (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 NPI 1699964163 active?
Yes, as of the latest NPPES snapshot, NPI 1699964163 is active (record last updated 2007-10-19).
How do I verify Katherine Onstott's NPI record?
Cross-check NPI 1699964163 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 2007-10-19.