Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Yurch Horn, NP

Adult Health Nurse Practitioner in San Leandro, CA · enumerated 2007.

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

National Provider Identifier

1164574331

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Registry record

Entity type Individual (Type 1)

Name Karen Yurch Horn

Credential NP

Sex Female

Practice address 2587 Merced St., San Leandro, CA, 94577

Phone (510) 351-3553

Fax (510) 351-3585

Enumeration date Jan 17, 2007

Last updated in NPPES Nov 24, 2009

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN297159 (CA) Primary

NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority. About the NP 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 NPI 1164574331 active?

Yes, as of the latest NPPES snapshot, NPI 1164574331 is active (record last updated 2009-11-24).

How do I verify Karen Horn's NPI record?

Cross-check NPI 1164574331 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 2009-11-24.