Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

South Texas Cardiovascular Laboratory

Specialist in San Antonio, TX · enumerated 2005 · authorized official Stcl Lab, E D.

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

National Provider Identifier

1639161763

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Registry record

Entity type Organization (Type 2)

Legal business name South Texas Cardiovascular Laboratory

Practice address 4330 Medical Dr, Suite A, San Antonio, TX, 78229

Phone (210) 615-7734

Enumeration date Aug 16, 2005

Last updated in NPPES Jul 24, 2008

Taxonomy & classification

174400000X Specialist Other Service Providers Primary

293D00000X Physiological Laboratory Laboratories Secondary

Authorized official

Name Stcl Lab

Title E D

Phone (210) 615-7734

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 South Texas Cardiovascular Laboratory?

South Texas Cardiovascular Laboratory is registered in NPPES as a Specialist (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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-07-24.