Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Seiden & Porjesz LLP

Organization Clinical Psychologist · NPI 1487750717

Seiden & Porjesz LLP provides Clinical Psychologist services in New York, New York. Registered with an NPI since 2006.

In the registry since
2006
Specialties on file
2
What do these letters mean?
LLP — Limited liability partnership
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

133 E 91st St
New York, NY 10128-1601
Phone: (212) 410-4441
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X
Geriatric Psychiatry Physician Taxonomy 2084P0805X

Record details

NPI number1487750717
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Leslie Seiden — President · (212) 410-4441
NPI enumeratedSeptember 15, 2006
Last updated in NPPESSeptember 11, 2025
Mailing address133 E 91st St, New York, NY 10128-1601

Other providers in New York