Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Karen Jeannine St John, RN

Registered Nurse in Willows, CA · enumerated 2011.

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

National Provider Identifier

1750686689

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Registry record

Entity type Individual (Type 1)

Name Mrs. Karen Jeannine St John

Credential RN

Sex Female

Practice address 242 N Villa Ave, Willows, CA, 95988

Phone (530) 934-6582

Fax (530) 934-6592

Enumeration date Jan 25, 2011

Last updated in NPPES Jan 25, 2011

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License RN476017 (CA) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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

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 Karen St John?

Karen St John 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 2011-01-25.