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

John Matthias, PHD

Individual provider Psychologist · NPI 1366560633

John Matthias, PHD is a Psychologist in Las Vegas, Nevada. Practices as a sole proprietor. Licensed in Nevada.

Licensed in
NV
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.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1050 S Rainbow Blvd
Las Vegas, NV 89145-6231
Phone: (702) 258-5855
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

Psychologist (primary) Taxonomy 103T00000X · Licence PY0520 (NV)

Record details

NPI number1366560633
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedMarch 26, 2007
Last updated in NPPESJuly 8, 2007

Other providers in Las Vegas