Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Crystal Arbizu

Clinical Social Worker in Tustin, CA · enumerated 2015 · practices at Fresenius Medical Care Orange County, LLC.

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

National Provider Identifier

1235507229

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Registry record

Entity type Individual (Type 1)

Name Crystal Arbizu

Sex Female

Practice address Tustin, CA, 92780

Phone (714) 730-1428

Enumeration date Sep 8, 2015

Last updated in NPPES Dec 22, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 100245 (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

Is NPI 1235507229 active?

Yes, as of the latest NPPES snapshot, NPI 1235507229 is active (record last updated 2021-12-22).

How do I verify Crystal Arbizu's NPI record?

Cross-check NPI 1235507229 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Fresenius Medical Care Orange County, LLC End-Stage Renal Disease (ESRD) Treatment Clinic/Center · Tustin, CA NPI 1285009704

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-22.