Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Sandra Ileana Diaz O'Donnell, PA-C

Physician Assistant in Pasadena, CA · enumerated 2006.

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

National Provider Identifier

1548223266

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Registry record

Entity type Individual (Type 1)

Name Mrs. Sandra Ileana Diaz O'Donnell

Credential PA-C

Sex Female

Practice address 401 S Fair Oaks Ave, Pasadena, CA, 91105

Phone (626) 795-2244

Fax (626) 795-7441

Enumeration date Apr 11, 2006

Last updated in NPPES Aug 19, 2022

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA13219 (CA) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Sandra O'Donnell?

Sandra O'Donnell is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-19.