DR. WALT MERCER PH.D.
NPI 1548457336
Clinical Neuropsychologist in San Marcos, TX

Q: What is Walt Mercer's NPI number?

The NPI number for Walt Mercer is 1548457336. It was assigned to this individual provider in the NPPES registry on September 26, 2007.

Q: What is Walt Mercer's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

Q: When was this NPI record last updated?

The NPPES record for Walt Mercer was last updated on September 26, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since September 26, 2007

1341 THORPE LN, SAN MARCOS, TX 78666(512) 558-7770(512) 558-7773 Get Directions Write a Review

NPPES record last updated: September 26, 2007. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Walt Mercer Ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WALT MERCER PH.D. (NPI 1548457336) is an individual clinical neuropsychologist in San Marcos, Texas, licensed in Texas (25814) and active in the NPI registry since September 2007.

NPPES Registry Identity

NPI1548457336

Entity TypeIndividualMale

Primary Taxonomy103G00000X

Provider Legal NameDR. WALT MERCERCredential: PH.D.

Location Address1341 THORPE LNSan Marcos, TX 78666-7113

Mailing Address1341 Thorpe LnSan Marcos, TX 78666-7113 · (512) 558-7770 · Fax (512) 558-7773

Phone(512) 558-7770

Fax(512) 558-7773

Sole ProprietorYes

Enumeration DateSeptember 26, 2007

✔ NPI 1548457336 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinical NeuropsychologistBehavioral Health & Social Service Providers

Taxonomy Code103G00000X

License✔ Licensed in TX · 25814

Definition

A clinical psychologist who applies principles of assessment and intervention based upon the scientific study of human behavior as it relates to normal and abnormal functioning of the central nervous system. The specialty is dedicated to enhancing the understanding of brain-behavior relationships and the application of such knowledge to human problems.

1341 THORPE LN, San Marcos, TX 78666

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Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TOAN QUOC VU M.D.

Psychiatry & Neurology (Neurology)

1341 THORPE LN
SAN MARCOS, TX 78666

Hays County (512) 558-7770

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Walt Mercer's NPI number?

The NPI number for Walt Mercer is 1548457336. It was assigned to this individual provider in the NPPES registry on September 26, 2007.

Where is Walt Mercer located?

Walt Mercer practices at 1341 Thorpe Ln, San Marcos, TX 78666. The listed phone number is (512) 558-7770.

What is Walt Mercer's specialty?

The primary specialty registered for this NPI is Clinical Neuropsychologist with taxonomy code 103G00000X.

When was this NPI record last updated?

The NPPES record for Walt Mercer was last updated on September 26, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.