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

Dr. John Donald Williams, PHD

Individual provider Clinical Psychologist · NPI 1467787093

Dr. John Donald Williams, PHD is a Clinical Psychologist in State College, Pennsylvania. Practices as a sole proprietor. Licensed in Pennsylvania.

Licensed in
PA
In the registry since
2009
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 →

Practice location Address checks out

1315 W College Ave Ste 303
State College, PA 16801-2776
Phone: (814) 441-5738
Fax: (814) 861-5163
Show map & directions

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

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PS004377L (PA)

Record details

NPI number1467787093
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedOctober 15, 2009
Last updated in NPPESJune 28, 2012

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