Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Madeleine Kay Nelson, MSW

Clinical Social Worker in San Leandro, CA · enumerated 2007.

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

National Provider Identifier

1922217538

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Registry record

Entity type Individual (Type 1)

Name Ms. Madeleine Kay Nelson

Credential MSW

Sex Female

Practice address 2500 Fairmont Dr, San Leandro, CA, 94578

Phone (510) 667-3012

Enumeration date May 21, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW05858 (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.

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Frequently asked questions

How do I verify Madeleine Nelson's NPI record?

Cross-check NPI 1922217538 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1922217538 active?

Yes, as of the latest NPPES snapshot, NPI 1922217538 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.