Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Nancy Catherine O'Brien, RN

Psychiatric/Mental Health Registered Nurse in Clifton, NJ · enumerated 2007.

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

National Provider Identifier

1083740138

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Registry record

Entity type Individual (Type 1)

Name Mrs. Nancy Catherine O'Brien

Credential RN

Sex Female

Practice address 777 Bloomfield Ave, Clifton, NJ, 07012

Phone (973) 594-0125

Fax (973) 594-0536

Enumeration date Feb 25, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 26NO06794900 (NJ) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Nancy O'Brien?

The National Provider Identifier (NPI) for Nancy O'Brien is 1083740138, a Type 1 (individual) record in the CMS NPPES registry.

Where does Nancy O'Brien practice?

The practice location on file with NPPES is in Clifton, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.