Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

San Marcos Diagnostics PA

Q: What type of organization is San Marcos Diagnostics PA?

San Marcos Diagnostics PA is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Internal Medicine Physician in San Marcos, TX · enumerated 2007 · authorized official Grayson Smith, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1235327073

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Registry record

Entity type Organization (Type 2)

Legal business name San Marcos Diagnostics PA

Practice address 1305 Wonder World Dr Ste 206, San Marcos, TX, 78666

Phone (512) 396-1525

Enumeration date Oct 5, 2007

Last updated in NPPES Nov 17, 2015

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Grayson Smith

Title President

Phone (512) 396-1525

Other identifiers

Identifier	Type	State	Issuer
0032MD	Other	TX	BCBS
170927101	Medicaid	TX	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is San Marcos Diagnostics PA?

San Marcos Diagnostics PA is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-11-17.