Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

First Assistant Nurses

Q: What type of organization is First Assistant Nurses?

First Assistant Nurses is registered in NPPES as a Registered Nurse First Assistant (its primary provider taxonomy).

Registered Nurse First Assistant in Mission Viejo, CA · enumerated 2023 · authorized official Leslie Jansen, Rnfa.

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

National Provider Identifier

1821796244

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name First Assistant Nurses

Practice address 26651 Las Tunas Dr, Mission Viejo, CA, 92692

Phone (949) 395-6661

Fax (949) 383-4808

Enumeration date Feb 16, 2023

Last updated in NPPES Feb 16, 2023

Taxonomy & classification

163WR0006X Registered Nurse First Assistant Nursing Service Providers Primary

Authorized official

Name Leslie Jansen

Title Rnfa

Phone (949) 395-6661

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is First Assistant Nurses?

First Assistant Nurses is registered in NPPES as a Registered Nurse First Assistant (its primary provider taxonomy).

Providers at this address

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Leslie Jansen Registered Nurse First Assistant · Mission Viejo, CA NPI 1992726715

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-16.