DEREK YI
NPI 1083257273
Social Worker in Pleasant Hill, CA

Q: What is Derek Yi's NPI number?

The NPI number for Derek Yi is 1083257273. It was assigned to this individual provider in the NPPES registry on October 21, 2019.

Q: What is Derek Yi's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

Q: When was this NPI record last updated?

The NPPES record for Derek Yi was last updated on July 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 21, 2019

3478 BUSKIRK AVE STE 260, PLEASANT HILL, CA 94523(925) 943-1794 Get Directions Write a Review

NPPES record last updated: July 7, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 7, 2025, May 26, 2023, Sep 10, 2021 and 2 more (5 updates tracked since 2019).

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About Derek Yi NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DEREK YI (NPI 1083257273) is an individual social worker in Pleasant Hill, California and active in the NPI registry since October 2019. He maintains 4 additional practice locations.

NPPES Registry Identity

NPI1083257273

Entity TypeIndividualMale

Primary Taxonomy104100000X

Provider Legal NameDEREK YI

Location Address3478 BUSKIRK AVE STE 260Pleasant Hill, CA 94523-4358

Mailing Address1038 Post StSan Francisco, CA 94109-5603 · (415) 775-2636

Phone(925) 943-1794

Sole ProprietorNo

Enumeration DateOctober 21, 2019

Last NPPES UpdateJuly 7, 20255 updates tracked since enumeration

NPPES CertifiedJuly 7, 2025

✔ NPI 1083257273 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers

Taxonomy Code104100000X

Definition

A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.

Also ListedCase Manager/Care CoordinatorTaxonomy 171M00000X

Also ListedCommunity Health WorkerTaxonomy 172V00000X

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

3478 BUSKIRK AVE STE 260, Pleasant Hill, CA 94523

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Secondary Practice Locations 4

Location 18945 Golf Links RdOakland, CA 94605-4124 · Phone (510) 317-1444

Location 22396 University AveEast Palo Alto, CA 94303 · Phone (650) 331-1611

Location 32015 Pioneer Ct Ste BSan Mateo, CA 94403-1736 · Phone (650) 348-6603

Location 41038 Post StSan Francisco, CA 94109-5603 · Phone (415) 775-2636

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KARYN BROPHY

Marriage & Family Therapist