Guillermo Marquez Macias Sr.

Guillermo Marquez Macias Sr. is a Family Nurse Practitioner provider (Nurse Practitioner) practicing in Pasadena, TX, registered in the NPPES registry with NPI 1013547231 since 2020. Practices at Legacy Community Health Services, Inc (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1013547231
Entity type	Individual (Type 1)
Name	Guillermo Marquez Macias Sr.
Sex	Male
Practice address	908 SOUTHMORE AVE STE 100, Pasadena, TX, 77502
Phone	7135541091
Enumeration date	2020-01-16
Last updated in NPPES	2026-03-16

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
363LF0000X	Family Nurse Practitioner	Primary	AP144288	TX

Copy-ready billing details

Provider: Guillermo Macias
NPI: 1013547231
Taxonomy: 363LF0000X (Family Nurse Practitioner)
Address: 908 SOUTHMORE AVE STE 100, Pasadena, TX, 77502

Other providers at this practice address

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

Verify this record

Cross-check NPI 1013547231 against the authoritative CMS record: view Guillermo Marquez Macias Sr. on the official NPPES registry .

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 or validate an NPI number.

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.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2026-03-16.