What is Youjin Chang's NPI number?

Youjin Chang's National Provider Identifier (NPI) is 1538046438, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Youjin Chang's specialty?

Youjin Chang is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).

Where is Youjin Chang located?

Youjin Chang's practice location on file with NPPES is 1100 San Leandro Blvd Ste 400, San Leandro, CA 94577-1670.

What is Youjin Chang's phone number?

The practice phone number listed in the NPPES registry for Youjin Chang is (510) 920-6169.

Is Youjin Chang's NPI active?

Yes — Youjin Chang's NPI (1538046438) is active in the NPPES registry as of the last update on 2025-08-20.

IndividualActive

Youjin Chang

NPI 1538046438 · Social Worker · San Leandro, CA

Youjin Chang is a Social Worker provider in San Leandro, CA (NPI 1538046438).

Provider details

NPI number: 1538046438
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Sole proprietor: No

Specialties & taxonomies

Social WorkerPrimary104100000X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(48/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

1100 San Leandro Blvd Ste 400

San Leandro, CA 94577-1670

Phone: (510) 920-6169

Street-level locationGet directions

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Mailing address