Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Susan G O'Brien, APN

Nurse Practitioner in Phoenix, AZ · enumerated 2012.

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

National Provider Identifier

1225388176

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Registry record

Entity type Individual (Type 1)

Name Ms. Susan G O'Brien

Credential APN

Sex Female

Practice address 11209 N Tatum Blvd Ste 255, Phoenix, AZ, 85028

Phone (602) 494-5050

Enumeration date Sep 18, 2012

Last updated in NPPES Aug 3, 2026

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 041322316 (IL) Secondary

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209005704 (IL) Primary

163W00000X Registered Nurse Nursing Service Providers · License 341302 (AZ) Secondary

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 Susan O'Brien?

Susan O'Brien is registered in NPPES with the primary taxonomy of Nurse Practitioner. 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 2026-08-03.