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

Ms. Eileen Mellor Siciliano, L.C.S.W.

Clinical Social Worker in Southold, NY · enumerated 2006.

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

National Provider Identifier

1013977057

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Registry record

Entity type Individual (Type 1)

Name Ms. Eileen Mellor Siciliano

Credential L.C.S.W.

Sex Female

Practice address Southold, NY, 11971

Phone (516) 746-2972

Enumeration date Mar 24, 2006

Last updated in NPPES Dec 30, 2025

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 R053336-1 (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
P495339	Other	NY	OXFORD

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 Eileen Siciliano practice?

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

What is the NPI number for Eileen Siciliano?

The National Provider Identifier (NPI) for Eileen Siciliano is 1013977057, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-30.