SYDNEY MASTORIDES LMSW
NPI 1700694411
Social Worker - Clinical in West Islip, NY

Active since December 27, 2024
467A HIGBIE LN, WEST ISLIP, NY 11795(516) 512-2409 Get Directions Write a Review

NPPES record last updated: July 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Sydney Mastorides Lmsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SYDNEY MASTORIDES LMSW (NPI 1700694411) is an individual clinical provider in West Islip, New York, licensed in New York (099273) and active in the NPI registry since December 2024.

NPPES Registry Identity

NPI1700694411
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameSYDNEY MASTORIDESCredential: LMSW
Location Address467A HIGBIE LNWest Islip, NY 11795-2240
Mailing Address467a Higbie LnWest Islip, NY 11795-2240
Sole ProprietorNo
Enumeration DateDecember 27, 2024
Last NPPES UpdateJuly 14, 2025
NPPES CertifiedJuly 14, 2025
NPI 1700694411 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License Licensed in NY · 099273
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
Also ListedSocial WorkerTaxonomy 104100000X · License 113433 (NY)
467A HIGBIE LN, West Islip, NY 11795

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Social Worker
467A HIGBIE LN
WEST ISLIP, NY 11795
Social Worker
467A HIGBIE LN
WEST ISLIP, NY 11795

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sydney Mastorides's NPI number?

The NPI number for Sydney Mastorides is 1700694411. It was assigned to this individual provider in the NPPES registry on December 27, 2024.

Where is Sydney Mastorides located?

Sydney Mastorides practices at 467A Higbie Ln, West Islip, NY 11795. The listed phone number is (516) 512-2409.

What is Sydney Mastorides's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

When was this NPI record last updated?

The NPPES record for Sydney Mastorides was last updated on July 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.