Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Guillermo Vallejo, CRNA

Certified Registered Nurse Anesthetist in Orange, CA · enumerated 2014.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1205237955

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Registry record

Entity type Individual (Type 1)

Name Guillermo Vallejo

Credential CRNA

Sex Male

Practice address Orange, CA, 92868

Phone (714) 456-7890

Enumeration date Sep 12, 2014

Last updated in NPPES Feb 15, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 677299 (CA) Secondary

163W00000X Registered Nurse Nursing Service Providers · License 95000168 (CA) Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 677299 (CA) Primary

CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Is NPI 1205237955 active?

Yes, as of the latest NPPES snapshot, NPI 1205237955 is active (record last updated 2024-02-15).

How do I verify Guillermo Vallejo's NPI record?

Cross-check NPI 1205237955 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Amir Seifi Medical Physician Assistant · Orange, CA NPI 1548263015 Melvin Seard Urology Physician · Orange, CA NPI 1538163126 Charles Rosen Orthopaedic Surgery of the Spine Physician · Orange, CA NPI 1548264013 Joseph Ruggio Cardiovascular Disease Physician · Orange, CA NPI 1124023163 Kurt Richards Surgical Physician Assistant · Orange, CA NPI 1598760092 Akash Joshi Body Imaging Physician · Orange, CA NPI 1013913490 Arti Gupta Body Imaging Physician · Orange, CA NPI 1770589152 Lucia Webster Certified Registered Nurse Anesthetist · Orange, CA NPI 1073510590

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-15.