Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Abby Leefer, Licensed Clinical Social Worker, PC

Clinical Social Worker in Port Jefferson, NY · enumerated 2020 · authorized official Donna Labriola, Billing Manager.

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

National Provider Identifier

1417575721

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Registry record

Entity type Organization (Type 2)

Legal business name Abby Leefer, Licensed Clinical Social Worker, PC

Practice address 710 Main St, Port Jefferson, NY, 11777

Phone (631) 928-9808

Enumeration date Jul 13, 2020

Last updated in NPPES Jul 13, 2020

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

Authorized official

Name Donna Labriola

Title Billing Manager

Phone (631) 553-6360

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 type of organization is Abby Leefer, Licensed Clinical Social Worker, PC?

Abby Leefer, Licensed Clinical Social Worker, PC is registered in NPPES as a Clinical Social Worker (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-13.