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

Diane Blake, LCSW

Q: What is the NPI number for Diane Blake?

The National Provider Identifier (NPI) for Diane Blake is 1437502903, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Social Worker in Pacifica, CA · enumerated 2016.

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

National Provider Identifier

1437502903

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Registry record

Entity type Individual (Type 1)

Name Diane Blake

Credential LCSW

Sex Female

Practice address Pacifica, CA, 94044

Phone (650) 713-5224

Enumeration date Jul 19, 2016

Last updated in NPPES Sep 29, 2016

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCS 24542 (CA) Primary

LCSW — Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

Where does Diane Blake practice?

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

What is the NPI number for Diane Blake?

The National Provider Identifier (NPI) for Diane Blake is 1437502903, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-29.