NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Youjin Chang

Social Worker in San Leandro, CA · enumerated 2025 · practices at Alameda County Office of Dental Health.

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

National Provider Identifier

1538046438

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Youjin Chang
Sex X
Practice address 1100 San Leandro Blvd Ste 400, San Leandro, CA, 94577
Phone (510) 920-6169
Enumeration date Aug 20, 2025
Last updated in NPPES Aug 20, 2025

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers 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

What is the NPI number for Youjin Chang?
The National Provider Identifier (NPI) for Youjin Chang is 1538046438, a Type 1 (individual) record in the CMS NPPES registry.
Where does Youjin Chang practice?
The practice location on file with NPPES is in San Leandro, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-20.