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

Dr. William Martin Greenstadt, PHD

Individual provider Psychoanalysis Psychologist · NPI 1922021559

Dr. William Martin Greenstadt, PHD is a Psychoanalysis Psychologist in New York, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2006
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

232 Madison Ave Ste 1308
New York, NY 10016-2901
Phone: (212) 686-9256
Fax: (212) 686-4104
Show map & directions

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

Specialties & licences

Psychoanalysis Psychologist (primary) Taxonomy 103TP0814X · Licence 000338-1 (NY)
Psychologist Taxonomy 103T00000X · Licence 002936-1 (NY)

Record details

NPI number1922021559
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedJuly 25, 2006
Last updated in NPPESSeptember 11, 2025

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