Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Antonia Tan Diaz, BSN,RN

Ambulatory Women's Health Care Registered Nurse in Riverside, CA · enumerated 2025.

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

National Provider Identifier

1437947538

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Registry record

Entity type Individual (Type 1)

Name Antonia Tan Diaz

Credential BSN,RN

Sex Female

Practice address 3772 Tibbetts St, Riverside, CA, 92506

Phone (888) 743-7526

Enumeration date Apr 28, 2025

Last updated in NPPES Apr 28, 2025

Taxonomy & licenses

163WW0101X Ambulatory Women's Health Care Registered Nurse Nursing Service Providers · License 95400636 (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

How do I verify Antonia Diaz's NPI record?

Cross-check NPI 1437947538 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1437947538 active?

Yes, as of the latest NPPES snapshot, NPI 1437947538 is active (record last updated 2025-04-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-28.