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

Dr. William Peter Haddad, PHD

Individual provider Clinical Psychologist · NPI 1578772430

Dr. William Peter Haddad, PHD is a Clinical Psychologist in Worcester, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2007.

Licensed in
MA
In the registry since
2007
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

340 Main St
Worcester, MA 01608-1604
Phone: (508) 926-0070
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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 7119 (MA)

Record details

NPI number1578772430
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedMay 21, 2007
Last updated in NPPESJuly 8, 2007

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