Rena Kassak
NPI 1689518136 · Family Nurse Practitioner · New York, NY
Rena Kassak is a Family Nurse Practitioner provider in New York, NY (NPI 1689518136).
Provider details
- NPI number
- 1689518136
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- 358920 (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
Under 1 yr in 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
- 2026-04-15
- Last updated
- 2026-04-15
- Certified
- 2026-04-15
Frequently asked questions
- What is Rena Kassak's NPI number?
- Rena Kassak's National Provider Identifier (NPI) is 1689518136, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rena Kassak's specialty?
- Rena Kassak is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Rena Kassak located?
- Rena Kassak's practice location on file with NPPES is 211 E 51st St, New York, NY 10022-6526.
- What is Rena Kassak's phone number?
- The practice phone number listed in the NPPES registry for Rena Kassak is (212) 398-1709.
- Is Rena Kassak's NPI active?
- Yes — Rena Kassak's NPI (1689518136) is active in the NPPES registry as of the last update on 2026-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.