NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

San Marcos Asc LLC

Ambulatory Surgical Clinic/Center in San Marcos, TX · enumerated 2013 · authorized official William Swinney, Vp.

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

National Provider Identifier

1619218096

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name San Marcos Asc LLC
Practice address 1891 Medical Pkwy, San Marcos, TX, 78666
Enumeration date Mar 8, 2013
Last updated in NPPES Apr 17, 2018

Taxonomy & classification

261QA1903X Ambulatory Surgical Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name William Swinney
Title Vp

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 is the NPI number for San Marcos Asc LLC?
The NPI for San Marcos Asc LLC is 1619218096, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for San Marcos Asc LLC?
NPPES lists William Swinney (Vp) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-04-17.