Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carolyn Joyce Oconnor, RN

Registered Nurse in Fairfield, CA · enumerated 2015.

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

National Provider Identifier

1164812947

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Registry record

Entity type Individual (Type 1)

Name Carolyn Joyce Oconnor

Credential RN

Sex Female

Practice address 275 Beck Ave, Fairfield, CA, 94533

Phone (707) 784-8400

Enumeration date Jan 30, 2015

Last updated in NPPES Aug 15, 2019

Taxonomy & licenses

163WP0808X Psychiatric/Mental Health Registered Nurse Nursing Service Providers · License 661390 (CA) Secondary

163W00000X Registered Nurse Nursing Service Providers · License 661390 (CA) 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

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.

What specialty is Carolyn Oconnor?

Carolyn Oconnor is registered in NPPES with the primary taxonomy of Registered Nurse. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Kimberly Smith Clinical Psychologist · Fairfield, CA NPI 1639119563 Ronald Chapman Family Medicine Physician · Fairfield, CA NPI 1629006333 Alan Werblin Family Medicine Physician · Fairfield, CA NPI 1447338256 Dee Carter Marriage & Family Therapist · Fairfield, CA NPI 1386704328 Irene Jimenez Community Health Registered Nurse · Fairfield, CA NPI 1417017971 Meryl Hoffman-Pagan Clinical Social Worker · Fairfield, CA NPI 1811058142 Nikki Anthony Community Health Registered Nurse · Fairfield, CA NPI 1023179561 Leticia De La Cruz Salas Clinical Social Worker · Fairfield, CA NPI 1508927765

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-15.