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

MS. Janelle Lynn Tychnowitz, RN, CPN, PNP

Individual provider Pediatric Nurse Practitioner · NPI 1184857336

MS. Janelle Lynn Tychnowitz, RN, CPN, PNP is a Nurse Practitioner in Stony Brook, New York. Qualified in 2003, 23 years ago. Licensed in New York.

Years since qualifying
23
Licensed in
NY
In the registry since
2009
Specialties on file
2
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
PNP — Pediatric Nurse Practitioner
A nurse practitioner specialising in children.

See every abbreviation used in this directory →

Practice location PO Box

The provider listed a PO Box rather than a street location, so this is not a walk-in address.

PO Box 1559
Stony Brook, NY 11790-0989
Phone: (631) 444-0650
Show map & directions

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

Specialties & licences

Pediatric Nurse Practitioner (primary) Taxonomy 363LP0200X · Licence F382571-1 (NY)
Pediatric Registered Nurse Taxonomy 163WP0200X · Licence 544842-1 (NY)

Record details

NPI number1184857336
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , CPN , PNP
Sole proprietorNo
NPI enumeratedSeptember 3, 2009
Last updated in NPPESMarch 3, 2026
Certification dateMarch 3, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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