Anna Grefenshteyn, FNP
NPI 1477252187 · Family Nurse Practitioner · Brooklyn, NY
Anna Grefenshteyn, FNP is a Family Nurse Practitioner provider in Brooklyn, NY (NPI 1477252187).
Provider details
- NPI number
- 1477252187
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- Yes
- License
- F351412-01 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-03-02
- Last updated
- 2023-03-02
- Certified
- 2023-03-01
Frequently asked questions
- What is Anna Grefenshteyn's NPI number?
- Anna Grefenshteyn's National Provider Identifier (NPI) is 1477252187, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anna Grefenshteyn's specialty?
- Anna Grefenshteyn is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Anna Grefenshteyn located?
- Anna Grefenshteyn's practice location on file with NPPES is 719 Ocean View Ave, Brooklyn, NY 11235-6317.
- What is Anna Grefenshteyn's phone number?
- The practice phone number listed in the NPPES registry for Anna Grefenshteyn is (718) 844-3332.
- Is Anna Grefenshteyn's NPI active?
- Yes — Anna Grefenshteyn's NPI (1477252187) is active in the NPPES registry as of the last update on 2023-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.