Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arlene Seitz, LCSW

Clinical Social Worker in Franklin Square, NY · enumerated 2007.

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

National Provider Identifier

1255540209

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Registry record

Entity type Individual (Type 1)

Name Arlene Seitz

Credential LCSW

Sex Female

Practice address 1200a Hempstead Tpke, Franklin Square, NY, 11010

Phone (516) 328-1717

Fax (516) 328-1627

Enumeration date May 22, 2007

Last updated in NPPES Feb 7, 2011

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 064997 (NY) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 0708050 (NY) Primary

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

Other identifiers

Identifier	Type	State	Issuer
01013818	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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Arlene Seitz?

Arlene Seitz is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-02-07.