Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mr. Ivan Leonidas Giannou, RN

Individual provider Adult Psychiatric/Mental Health Registered Nurse · NPI 1770133423

Mr. Ivan Leonidas Giannou, RN is an Adult Psychiatric/Mental Health Registered Nurse in West Brentwood, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2019
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

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Practice location Address checks out

998 Crooked Hill Rd
West Brentwood, NY 11717-1019
Phone: (631) 761-3500
Fax: (631) 761-2600
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Adult Psychiatric/Mental Health Registered Nurse (primary) Taxonomy 163WP0809X · Licence 669877 (NY)

Record details

NPI number1770133423
Entity typeIndividual (Type 1)
GenderMale
Credentials RN
Sole proprietorYes
NPI enumeratedSeptember 15, 2019
Last updated in NPPESSeptember 23, 2019

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