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

Anna Grefenshteyn, FNP

Individual provider Family Nurse Practitioner · NPI 1477252187

Anna Grefenshteyn, FNP is a Family Nurse Practitioner in Brooklyn, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2023
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

See every abbreviation used in this directory →

Practice location Address checks out

719 Ocean View Ave
Brooklyn, NY 11235-6317
Phone: (718) 844-3332
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 F351412-01 (NY)

Record details

NPI number1477252187
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorYes
NPI enumeratedMarch 2, 2023
Last updated in NPPESMarch 2, 2023
Certification dateMarch 1, 2023

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