Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Hannah Horowitz

Social Worker in Willows, CA · enumerated 2015.

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

National Provider Identifier

1871961888

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Registry record

Entity type Individual (Type 1)

Name Hannah Horowitz

Sex Female

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

Phone (530) 934-6582

Enumeration date Sep 8, 2015

Last updated in NPPES Sep 8, 2015

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers 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

What is the NPI number for Hannah Horowitz?

The National Provider Identifier (NPI) for Hannah Horowitz is 1871961888, a Type 1 (individual) record in the CMS NPPES registry.

Where does Hannah Horowitz practice?

The practice location on file with NPPES is in Willows, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-08.