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

Walter S Gilliam, PHD

Individual provider Clinical Child & Adolescent Psychologist · NPI 1588623938

Walter S Gilliam, PHD is a Clinical Child & Adolescent Psychologist in New Haven, Connecticut. Licensed in Connecticut. Registered with an NPI since 2006.

Licensed in
CT
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.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

800 Howard Avenue Yale Physicians Bldg
New Haven, CT 06519
Phone: (203) 785-2140
Fax: (203) 785-6414
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Clinical Child & Adolescent Psychologist (primary) Taxonomy 103TC2200X · Licence 002137 (CT)

Record details

NPI number1588623938
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedMarch 22, 2006
Last updated in NPPESJuly 13, 2026

Other providers in New Haven