GUILLERMO M. ALDAVE ORZAIZ MD, PHD – NPI #1255783411
Neurological Surgery

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.

GUILLERMO ALDAVE ORZAIZ is a neurological surgeon located in HOUSTON, TX. NPPES has assigned the NPI number 1255783411 to GUILLERMO ALDAVE ORZAIZ on July 12, 2016. It is a Type-1 NPI, indicating this NPI number is associated with an individual. The primary taxonomy selected by this provider is 207T00000X from the Health Care Provider Taxonomy code set, which is classified as Neurological Surgery.

The NPI profile was last updated on Mar 04, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for GUILLERMO ALDAVE ORZAIZ below.

NPI Profile for
GUILLERMO M. ALDAVE ORZAIZ

NPI Number
1255783411
Enumeration Date

(about 10 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
GUILLERMO M. ALDAVE ORZAIZ
Credentials
MD, PHD
Primary location
6701 FANNIN ST
HOUSTON, TX 77030-2608
Phone: (832) 822-1282 Fax:
1 Other location(s):
1515 Holcombe Blvd
Houston, TX 77030-4000
Phone: (713) 792-6161
Mailing address
Same as primary location
Sole Proprietor
No
Updated
Certification Date
Mar 04, 2026

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Identifiers

Identifiers for GUILLERMO ALDAVE ORZAIZ

Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.

DescriptionIssuerStateIdentifier
otherTEXAS MEDICAL LICENSE (VISSITING PROFESSOR TEMPORARY LICENSE)TX45307
Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
207T00000X
- Neurological Surgery (Primary)
TX T1276

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices

Why is my NPI data (personal information) being displayed publicly?
If you have an active NPI profile, your profile is required to be disclosed according to the FOIA and eFOIA. HIPAA also requires covered providers to share their NPI with other providers, health plans, clearinghouses and any entity that may need it for billing purposes.

How do I correct or change the NPI data displayed here?
At any time, providers can make changes to their NPI profile at NPPES. Login to NPPES to make changes online or call (800) 465-3203 for assistance. Changes made at NPPES will be reflected on this web site within a few days.

Can I hide my NPI profile from the public?
Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.