Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Guillermo Marquez Macias Sr.

Family Nurse Practitioner in Pasadena, TX · enumerated 2020 · practices at Legacy Community Health Services, Inc.

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

National Provider Identifier

1013547231

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Registry record

Entity type Individual (Type 1)

Name Guillermo Marquez Macias Sr.

Sex Male

Practice address 908 Southmore Ave Ste 100, Pasadena, TX, 77502

Phone (713) 554-1091

Enumeration date Jan 16, 2020

Last updated in NPPES Mar 16, 2026

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP144288 (TX) Primary

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.

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Frequently asked questions

Where does Guillermo Macias practice?

The practice location on file with NPPES is in Pasadena, TX. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Guillermo Macias?

The National Provider Identifier (NPI) for Guillermo Macias is 1013547231, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Syed Hasan Sports Medicine (Family Medicine) Physician · Pasadena, TX NPI 1265534465 Billy Marsh Family Nurse Practitioner · Pasadena, TX NPI 1669082723 Legacy Community Health Services, Inc Federally Qualified Health Center (FQHC) · Pasadena, TX NPI 1902754351

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-16.