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

Martha Joy Klein, LCSW

Clinical Social Worker in Manteca, CA · enumerated 2012.

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

National Provider Identifier

1598036949

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Martha Joy Klein

Credential LCSW

Sex Female

Practice address Manteca, CA, 95337

Phone (209) 275-7355

Enumeration date Jan 17, 2012

Last updated in NPPES Jan 2, 2025

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

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 30897 (CA) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 69260 (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

Is NPI 1598036949 active?

Yes, as of the latest NPPES snapshot, NPI 1598036949 is active (record last updated 2025-01-02).

How do I verify Martha Klein's NPI record?

Cross-check NPI 1598036949 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-02.