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

Mrs. Justine Marie Schleiffelder, APRN

Individual provider Family Nurse Practitioner · NPI 1356807242

Mrs. Justine Marie Schleiffelder, APRN is a Nurse Practitioner in Stony Brook, New York. Qualified in 2018, 8 years ago. Practices with Stony Brook Internists University Faculty Practice Corporation, a 428-clinician group and accepts Medicare assignment. Licensed in New York and South Carolina.

Years since qualifying
8
Licensed in
NY, SC
In the registry since
2019
Specialties on file
3
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

See every abbreviation used in this directory →

Practice location Address checks out

101 Nicolls Rd
Stony Brook, NY 11794-0001
Phone: (631) 689-8333
Show map & directions

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

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence F343487-1 (NY)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 343487 (NY)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 25869 (SC)

Record details

NPI number1356807242
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN
Sole proprietorNo
NPI enumeratedFebruary 15, 2019
Last updated in NPPESJuly 8, 2025
Certification dateJuly 8, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Stony Brook Internists University Faculty Practice Corporation — 428 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Stony Brook