Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ariana Lopez Casillas

Social Worker in San Francisco, CA · enumerated 2022 · practices at City & County of San Francisco.

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

National Provider Identifier

1578283610

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Registry record

Entity type Individual (Type 1)

Name Ariana Lopez Casillas

Sex Female

Practice address 425 7th St, San Francisco, CA, 94103

Phone (650) 266-7569

Enumeration date Aug 30, 2022

Last updated in NPPES Nov 19, 2025

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 131983 (CA) Primary

172V00000X Community Health Worker Other Service Providers Secondary

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

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 Ariana Lopez Casillas's NPI record?

Cross-check NPI 1578283610 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1578283610 active?

Yes, as of the latest NPPES snapshot, NPI 1578283610 is active (record last updated 2025-11-19).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-19.