GUILLERMO MARQUEZ MACIAS SR.
NPI 1013547231
Nurse Practitioner - Family in Pasadena, TX
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
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
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.
Medicare Billing Reassignments
2Medicare enrollment records show Guillermo Macias reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pasadena, TX 77504
- Reassigned Medicare billing, Texas enrollment
- 157 clinicians in this Medicare group
Beaumont, TX 77706
- Reassigned Medicare billing, Texas enrollment
- 351 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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.
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.
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.
PASADENA, TX 77502
PASADENA, TX 77502
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.
Which organizations bill Medicare for Guillermo Macias's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Guillermo Macias reassigns Medicare benefits to 2 organizations: Centerwell Senior Primary Care (tx) PA (Pasadena, TX) and Doctors Express Of The Beaumont Area PA (Beaumont, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Guillermo Macias's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
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 7 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.
# Guillermo Marquez Macias Sr. · NPI 1013547231
Family physician in Pasadena, Texas. Individual provider, active in the CMS NPPES registry since January 16, 2020.
## Identity
- **NPI:** 1013547231 (Entity type: Individual)
- **Enumerated:** January 16, 2020
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** AP144288 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 908 SOUTHMORE AVE STE 100, Pasadena, TX 77502-1120
- **Phone:** (713) 554-1091
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Centerwell Senior Primary Care (tx) PA (NPI 1861959298, Pasadena, TX); Doctors Express Of The Beaumont Area PA (NPI 1841525235, Beaumont, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** March 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1013547231) · Data from the CMS NPPES public registry.