Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Alexandra Sydney Madden, LCSW-R

Clinical Social Worker in Schenectady, NY · enumerated 2007.

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

National Provider Identifier

1558404715

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Registry record

Entity type Individual (Type 1)

Name Ms. Alexandra Sydney Madden

Credential LCSW-R

Sex Female

Practice address 1044 State St, Schenectady, NY, 12307

Phone (518) 370-1441

Fax (518) 395-9431

Enumeration date Feb 15, 2007

Last updated in NPPES May 21, 2019

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License R057918 (NY) Primary

Other identifiers

Identifier	Type	State	Issuer
331833	Other	NY	MEDICARE OSCAR
057918R	Other	NY	PROFESSIONAL LICENSE NUMBER
53099A	Other	NY	MEDICARE PIN
02995513	Medicaid	NY	-

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 1558404715 active?

Yes, as of the latest NPPES snapshot, NPI 1558404715 is active (record last updated 2019-05-21).

How do I verify Alexandra Madden's NPI record?

Cross-check NPI 1558404715 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-21.