SEIDEN & PORJESZ LLP
NPI 1487750717
Psychologist - Clinical in New York, NY

Q: What is Seiden & Porjesz LLP's NPI number?

The NPI number for Seiden & Porjesz LLP is 1487750717. It was assigned to this organization in the NPPES registry on September 15, 2006.

Q: What is Seiden & Porjesz LLP's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Active since September 15, 2006

133 E 91ST ST, NEW YORK, NY 10128(212) 410-4441 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

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About Seiden & Porjesz Llp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SEIDEN & PORJESZ LLP (NPI 1487750717) is a healthcare organization registered as a clinical in New York, New York and active in the NPI registry since September 2006. The organization lists Leslie Seiden, President, as its authorized official.

NPPES Registry Identity

NPI1487750717

Entity TypeOrganization

Primary Taxonomy103TC0700X

Legal Business NameSEIDEN & PORJESZ LLP

Location Address133 E 91ST STNew York, NY 10128-1601

Mailing Address133 E 91st StNew York, NY 10128-1601 · (212) 410-4441

Phone(212) 410-4441

Organization SubpartNo

Authorized OfficialLeslie SeidenPresident · (212) 410-4441

Enumeration DateSeptember 15, 2006

Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration

✔ NPI 1487750717 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

Also ListedPsychiatry & Neurology · Geriatric PsychiatryTaxonomy 2084P0805X

133 E 91ST ST, New York, NY 10128

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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Seiden & Porjesz LLP's NPI number?

The NPI number for Seiden & Porjesz LLP is 1487750717. It was assigned to this organization in the NPPES registry on September 15, 2006.

Where is Seiden & Porjesz LLP located?

Seiden & Porjesz LLP is located at 133 E 91st St, New York, NY 10128. The listed phone number is (212) 410-4441.

What is Seiden & Porjesz LLP's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

When was this NPI record last updated?

The NPPES record for Seiden & Porjesz LLP was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.