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DR. WILLIAM MARTIN GREENSTADT PH.D.
NPI 1922021559
Psychologist - Psychoanalysis in New York, NY

Active since July 25, 2006
232 MADISON AVE, SUITE 1308, NEW YORK, NY 10016(212) 686-9256(212) 686-4104 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 11, 2025, Jul 21, 2022 (2 updates tracked since 2022).

About Dr. William Martin Greenstadt Ph.d. NPPES

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

DR. WILLIAM MARTIN GREENSTADT PH.D. (NPI 1922021559) is an individual psychoanalysis provider in New York, New York, licensed in New York (000338-1) and active in the NPI registry since July 2006.

NPPES Registry Identity

NPI1922021559
Entity TypeIndividualMale
Primary Taxonomy103TP0814X
Provider Legal NameDR. WILLIAM MARTIN GREENSTADTCredential: PH.D.
Location Address232 MADISON AVE, SUITE 1308New York, NY 10016-2901
Mailing Address232 Madison Avenue, Suite 1308New York, NY 10016 · (212) 686-9256 · Fax (212) 686-4104
Phone(212) 686-9256
Fax(212) 686-4104
Sole ProprietorYes
Enumeration DateJuly 25, 2006
Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration
✔ NPI 1922021559 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychologist · PsychoanalysisBehavioral Health & Social Service Providers
Taxonomy Code103TP0814X
License✔ Licensed in NY · 000338-1
Definition
A psychologist whose specialty is distinguished from other specialties by its body of knowledge and its intensive treatment approaches. It aims at structural changes and modifications of a person's personality. Psychoanalysis promotes awareness of unconscious, maladaptive and habitually recurrent patterns of emotion and behavior, allowing previously unconscious aspects of the self to become integrated and promoting optimal functioning, healing and creative expression.
Also ListedPsychologistTaxonomy 103T00000X · License 002936-1 (NY)

Other Identifiers 2

Other0001099299NY · Mhn Vendor No.
Other0097451NY · Ghi Provider Number

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MAURICIO JESSELSON
Psychologist
232 MADISON AVE, 10TH FLOOR
NEW YORK, NY 10016
New York County (917) 846-3934

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 William Greenstadt's NPI number?

The NPI number for William Greenstadt is 1922021559. It was assigned to this individual provider in the NPPES registry on July 25, 2006.

Where is William Greenstadt located?

William Greenstadt practices at 232 Madison Ave Suite 1308, New York, NY 10016. The listed phone number is (212) 686-9256.

What is William Greenstadt's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Psychoanalysis, with taxonomy code 103TP0814X.

When was this NPI record last updated?

The NPPES record for William Greenstadt 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 11 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.