Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Eva Barbara Sleczka, LCSW

Q: What is the NPI number for Eva Sleczka?

The National Provider Identifier (NPI) for Eva Sleczka is 1124252309, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Social Worker in North Arlington, NJ · enumerated 2009.

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

National Provider Identifier

1124252309

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Registry record

Entity type Individual (Type 1)

Name Eva Barbara Sleczka

Credential LCSW

Sex Female

Practice address 79 Union Pl, North Arlington, NJ, 07031

Phone (201) 245-9390

Enumeration date May 4, 2009

Last updated in NPPES May 4, 2009

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 44SC04854200 (NJ) 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

Where does Eva Sleczka practice?

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

What is the NPI number for Eva Sleczka?

The National Provider Identifier (NPI) for Eva Sleczka is 1124252309, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-05-04.