What is Gregory Slonim's NPI number?

Gregory Slonim's National Provider Identifier (NPI) is 1336026897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Gregory Slonim's specialty?

Gregory Slonim is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).

Where is Gregory Slonim located?

Gregory Slonim's practice location on file with NPPES is 1358 56th St, Brooklyn, NY 11219-4616.

What is Gregory Slonim's phone number?

The practice phone number listed in the NPPES registry for Gregory Slonim is (718) 851-7100.

Is Gregory Slonim's NPI active?

Yes — Gregory Slonim's NPI (1336026897) is active in the NPPES registry as of the last update on 2025-08-18.

IndividualActive

Gregory Slonim

NPI 1336026897 · Registered Nurse · Brooklyn, NY

Gregory Slonim is a Registered Nurse provider in Brooklyn, NY (NPI 1336026897).

Provider details

NPI number: 1336026897
Entity type: Individual
Primary specialty: Registered NurseNursing Service Providers
Sex: Male
Sole proprietor: Yes
License: 823079 (NY)

Specialties & taxonomies

Registered NursePrimary163W00000XLicense 823079 (NY)
Nursing Service Providers
Case Management Registered Nurse163WC0400XLicense 823079 (NY)
Nursing Service Providers

Profile Score

Established profile(54/100 index)

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

1358 56th St

Brooklyn, NY 11219-4616

Phone: (718) 851-7100

Street-level locationGet directions

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Mailing address