Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Margaret E Griner Siniavsky, LSW

Clinical Social Worker in Bridgeton, NJ · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1295919462

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Margaret E Griner Siniavsky

Credential LSW

Sex Female

Practice address Bridgeton, NJ, 08302

Phone (856) 453-4678

Fax (856) 453-4597

Enumeration date Dec 24, 2007

Last updated in NPPES Dec 24, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 44SL04880800 (NJ) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Margaret Griner Siniavsky?

The National Provider Identifier (NPI) for Margaret Griner Siniavsky is 1295919462, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Griner Siniavsky practice?

The practice location on file with NPPES is in Bridgeton, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-24.