Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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MS. Irene Sofia Koutsidis-Martelli, LCSW

Individual provider Social Worker · NPI 1518584341

MS. Irene Sofia Koutsidis-Martelli, LCSW is a Social Worker in Northport, New York. Practices as a sole proprietor. Licensed in New York and South Carolina.

Licensed in
NY, SC
In the registry since
2020
Specialties on file
3
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

79 Middleville Rd
Northport, NY 11768-2296
Phone: (631) 261-4400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 097650 (NY)
Social Worker Taxonomy 104100000X · Licence 109203 (NY)
Clinical Social Worker Taxonomy 1041C0700X · Licence 18552 (SC)

Record details

NPI number1518584341
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorYes
NPI enumeratedJune 27, 2020
Last updated in NPPESJune 10, 2026
Certification dateJune 10, 2026

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