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

Dr. Walt Mercer, PHD

Individual provider Clinical Neuropsychologist · NPI 1548457336

Dr. Walt Mercer, PHD is a Clinical Neuropsychologist in San Marcos, Texas. Practices as a sole proprietor. Licensed in Texas.

Licensed in
TX
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 →

Practice location Address checks out

1341 Thorpe Ln
San Marcos, TX 78666-7113
Phone: (512) 558-7770
Fax: (512) 558-7773
Show map & directions

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

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence 25814 (TX)

Record details

NPI number1548457336
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedSeptember 26, 2007
Last updated in NPPESSeptember 26, 2007