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

Brianna Byllesby, PHD

Individual provider Clinical Psychologist · NPI 1235816745

Brianna Byllesby, PHD is a Clinical Psychologist in Vermillion, South Dakota. Practices as a sole proprietor. Licensed in South Dakota.

Licensed in
SD
In the registry since
2023
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

414 E Clark St
Vermillion, SD 57069-2307
Phone: (605) 658-3723
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 Psychologist (primary) Taxonomy 103TC0700X · Licence 648 (SD)

Record details

NPI number1235816745
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedJune 28, 2023
Last updated in NPPESJune 28, 2023
Certification dateJune 28, 2023

Other providers in Vermillion