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DEREK YI
NPI 1083257273
Social Worker in Pleasant Hill, CA

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: July 26, 2026.

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

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
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 375-2666
SARA LAPICOLA MSW
Social Worker (Clinical)
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 943-1794
ALEXIS ZIMMER MSW
Social Worker
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 943-1794
GRANT SHIMIZU
Marriage & Family Therapist
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 943-1794
MR. LARS GABRIEL ERIKSSON LCSW
Social Worker (Clinical)
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 967-4457
RYAN JAMES GOGARTY
Student in an Organized Health Care Education/Training Program
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 943-1794
SERENA MICHELLE GRAME
Marriage & Family Therapist
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 984-1794
LAUREN ATLAS
Counselor (Mental Health)
3478 BUSKIRK AVE STE 260
PLEASANT HILL, CA 94523
Contra Costa County (925) 943-1794

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

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.

Where is Derek Yi located?

Derek Yi practices at 3478 Buskirk Ave Ste 260, Pleasant Hill, CA 94523. The listed phone number is (925) 943-1794.

What is Derek Yi's specialty?

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

When was this NPI record last updated?

The NPPES record for Derek Yi was last updated on July 7, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.