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Horizon Psychology of Ny, Pllc

Community/Behavioral Health Agency in Port Jefferson, NY · enumerated 2021 · authorized official Jennifer Donnelly-Greenberg, Clinical Psychologist.

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

National Provider Identifier

1578137121

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Registry record

Entity type Organization (Type 2)
Legal business name Horizon Psychology of Ny, Pllc
Practice address 1000 Main St Ste G, Port Jefferson, NY, 11777
Phone (631) 209-7917
Enumeration date May 18, 2021
Last updated in NPPES Jan 30, 2024

Taxonomy & classification

251S00000X Community/Behavioral Health Agency Agencies Primary
261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities Secondary

Authorized official

Name Jennifer Donnelly-Greenberg
Title Clinical Psychologist
Phone (631) 209-7917

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.

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Frequently asked questions

What type of organization is Horizon Psychology of Ny, Pllc?
Horizon Psychology of Ny, Pllc is registered in NPPES as a Community/Behavioral Health Agency (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 2024-01-30.