GUILLERMO MARQUEZ MACIAS SR.
NPI 1013547231
Nurse Practitioner - Family in Pasadena, TX

Q: What is Guillermo Macias's NPI number?

The NPI number for Guillermo Macias is 1013547231. It was assigned to this individual provider in the NPPES registry on January 16, 2020.

Q: What is Guillermo Macias's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Guillermo Macias was last updated on March 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since January 16, 2020PECOS EnrolledAccepts Medicare Assignment

908 SOUTHMORE AVE STE 100, PASADENA, TX 77502(713) 554-1091 Get Directions Write a Review

NPPES record last updated: March 16, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 16, 2026, Jul 14, 2021, Jan 16, 2020 (3 updates tracked since 2020).

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About Guillermo Marquez Macias Sr. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GUILLERMO MARQUEZ MACIAS SR. (NPI 1013547231) is an individual family provider in Pasadena, Texas, licensed in Texas (AP144288) and active in the NPI registry since January 2020. He is enrolled in Medicare PECOS, maintains a secondary practice location in Houston, and is a graduate of Other (2019).

NPPES Registry Identity

NPI1013547231

Entity TypeIndividualMale

Primary Taxonomy363LF0000X

Provider Legal NameGUILLERMO MARQUEZ MACIAS SR.

Location Address908 SOUTHMORE AVE STE 100Pasadena, TX 77502-1120

Mailing Address4700 W Sam Houston Pkwy N, Ste 200Houston, TX 77041-8224 · (713) 402-7824 · Fax (713) 570-0196

Phone(713) 554-1091

Sole ProprietorNo

Medical School CMSOtherGraduated 2019

Enumeration DateJanuary 16, 2020

Last NPPES UpdateMarch 16, 20263 updates tracked since enumeration

NPPES CertifiedMarch 16, 2026

✔ NPI 1013547231 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

License✔ Licensed in TX · AP144288

908 SOUTHMORE AVE STE 100, Pasadena, TX 77502

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Secondary Practice Location 1

Location 1545 Gulfgate Center MallHouston, TX 77087-3023 · Phone (832) 664-7429

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Guillermo Marquez Macias Sr. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8820138217

PECOS Enrollment IDI20200409002211

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

20 services18 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77502 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$90.40 typical visit price

range $58.24 – $176.98

Typical copayment $22.60 (range $14.56 – $44.24)

Most-billed visit code 99203

Established Patient

$102.71 typical visit price

range $18.60 – $143.93

Typical copayment $25.67 (range $4.65 – $35.98)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SYED NAVED HASAN M.D.

Family Medicine (Sports Medicine)

908 SOUTHMORE AVE STE 100, PASADENA HEALTH CENTER
PASADENA, TX 77502

Harris County (713) 554-1091

BILLY D MARSH APRN

Nurse Practitioner (Family)

908 SOUTHMORE AVE STE 100
PASADENA, TX 77502

Harris County (713) 554-1091

LEGACY COMMUNITY HEALTH SERVICES, INC

Clinic/Center (Federally Qualified Health Center (FQHC))

908 SOUTHMORE AVE STE 100
PASADENA, TX 77502

Harris County (832) 548-5000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Guillermo Macias's NPI number?

The NPI number for Guillermo Macias is 1013547231. It was assigned to this individual provider in the NPPES registry on January 16, 2020.

Where is Guillermo Macias located?

Guillermo Macias practices at 908 Southmore Ave Ste 100, Pasadena, TX 77502. The listed phone number is (713) 554-1091.

What is Guillermo Macias's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Guillermo Macias enrolled in Medicare?

Yes. Guillermo Macias is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Guillermo Macias accept?

Health plans from Blue Cross and Blue Shield of Texas list Guillermo Macias as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Guillermo Macias was last updated on March 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.