Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Nassau Psychiatric Services, P.C.

Q: What is the NPI number for Nassau Psychiatric Services, P.C.?

The NPI for Nassau Psychiatric Services, P.C. is 1104273762, a Type 2 (organization) record in the CMS NPPES registry.

Mental Health Counselor in Uniondale, NY · enumerated 2016 · authorized official Martha Hyzak, Director.

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

National Provider Identifier

1104273762

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Registry record

Entity type Organization (Type 2)

Legal business name Nassau Psychiatric Services, P.C.

Practice address 626 Rxr Plz Ste 655, Uniondale, NY, 11556

Phone (516) 280-9030

Fax (516) 280-9029

Enumeration date May 24, 2016

Last updated in NPPES Sep 21, 2025

Taxonomy & classification

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License 243373 (NY) Primary

Authorized official

Name Martha Hyzak

Title Director

Phone (516) 280-9030

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 Nassau Psychiatric Services, P.C.?

The NPI for Nassau Psychiatric Services, P.C. is 1104273762, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Nassau Psychiatric Services, P.C.?

NPPES lists Martha Hyzak (Director) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-21.