Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan Bloch

Social Worker in San Leandro, CA · enumerated 2017.

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

National Provider Identifier

1518472471

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Registry record

Entity type Individual (Type 1)

Name Jonathan Bloch

Sex Male

Practice address 777 Davis St, San Leandro, CA, 94577

Phone (510) 839-3800

Enumeration date Dec 13, 2017

Last updated in NPPES Aug 5, 2025

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 110191 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Jonathan Bloch practice?

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

What is the NPI number for Jonathan Bloch?

The National Provider Identifier (NPI) for Jonathan Bloch is 1518472471, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-05.