GUILLERMO M ALDAVE ORZAIZ MD, PHD
NPI 1255783411
Neurological Surgery in Houston, TX
About Guillermo M Aldave Orzaiz Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GUILLERMO M ALDAVE ORZAIZ MD, PHD (NPI 1255783411) is an individual neurological surgery provider in Houston, Texas, licensed in Texas (T1276) and active in the NPI registry since July 2016. He is enrolled in Medicare PECOS and maintains a secondary practice location in Houston.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 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 (PECOS)
Guillermo M Aldave Orzaiz Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Guillermo Aldave Orzaiz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Houston, TX 77030
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Texas Childrens Physician Group
- 2,498 clinicians in this Medicare group
Houston, TX 77030
- Reassigned Medicare billing, Texas enrollment
- 2,675 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 77030 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HOUSTON, TX 77030
HOUSTON, TX 77030
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 Aldave Orzaiz's NPI number?
The NPI number for Guillermo Aldave Orzaiz is 1255783411. It was assigned to this individual provider in the NPPES registry on July 12, 2016.
Where is Guillermo Aldave Orzaiz located?
Guillermo Aldave Orzaiz practices at 6701 Fannin St, Houston, TX 77030. The listed phone number is (832) 822-1282.
What is Guillermo Aldave Orzaiz's specialty?
The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.
Is Guillermo Aldave Orzaiz enrolled in Medicare?
Yes. Guillermo Aldave Orzaiz is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Guillermo Aldave Orzaiz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Guillermo Aldave Orzaiz reassigns Medicare benefits to 2 organizations: Texas Children's Physician Group (Houston, TX) and Physicians Referral Service (Houston, 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 Aldave Orzaiz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Guillermo Aldave Orzaiz accept?
Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list Guillermo Aldave Orzaiz 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 Aldave Orzaiz was last updated on March 4, 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.