GUILLERMO M ALDAVE ORZAIZ MD, PHD
NPI 1255783411
Neurological Surgery in Houston, TX

Active since July 12, 2016PECOS Enrolled
6701 FANNIN ST, HOUSTON, TX 77030(832) 822-1282 Get Directions Write a Review

NPPES record last updated: March 4, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 4, 2026, Sep 27, 2016, Jul 12, 2016 (3 updates tracked since 2016).

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.

NPPES Registry Identity

NPI1255783411
Entity TypeIndividualMale
Primary Taxonomy207T00000X
Provider Legal NameGUILLERMO M ALDAVE ORZAIZCredential: MD, PHD
Location Address6701 FANNIN STHouston, TX 77030-2608
Mailing Address6701 Fannin StHouston, TX 77030-2608 · (832) 822-1282
Sole ProprietorNo
Enumeration DateJuly 12, 2016
Last NPPES UpdateMarch 4, 20263 updates tracked since enumeration
NPPES CertifiedMarch 4, 2026
NPI 1255783411 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
License Licensed in TX · T1276
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
6701 FANNIN ST, Houston, TX 77030

Other Identifiers 1

Other45307TX · Texas Medical License (vissiting Professor Temporary License)

Accepted Insurance

Medicare Participation & PECOS CMS

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

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).

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.

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.

New Patient
$134.06 typical visit price
range $58.24 – $176.98
Typical copayment $33.51 (range $14.56 – $44.24)
Most-billed visit code 99204
Established Patient
$72.62 typical visit price
range $18.60 – $143.93
Typical copayment $18.15 (range $4.65 – $35.98)
Most-billed visit code 99213
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 20

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

Pediatrics (Developmental - Behavioral Pediatrics)
6701 FANNIN ST
HOUSTON, TX 77030
Pediatrics (Pediatric Hematology-Oncology)
6701 FANNIN ST
HOUSTON, TX 77030
Nurse Anesthetist, Certified Registered
6701 FANNIN ST
HOUSTON, TX 77030
Nurse Practitioner
6701 FANNIN ST
HOUSTON, TX 77030
Pediatrics (Neonatal-Perinatal Medicine)
6701 FANNIN ST
HOUSTON, TX 77030
Nurse Practitioner
6701 FANNIN ST
HOUSTON, TX 77030
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
6701 FANNIN ST
HOUSTON, TX 77030
Physician Assistant
6701 FANNIN ST
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.

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 5 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.