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

Individual provider Clinical Psychologist · NPI 1124110291

Dr. Stephen Leff, PHD is a Clinical Psychologist in Philadelphia, Pennsylvania. Licensed in Pennsylvania. Registered with an NPI since 2006.

Licensed in
PA
In the registry since
2006
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

3440 Market St Ste 200
Philadelphia, PA 19104-3325
Phone: (215) 590-7555
Fax: (215) 590-7387
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PS008578L (PA)

Record details

NPI number1124110291
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedSeptember 28, 2006
Last updated in NPPESSeptember 4, 2012

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