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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MS. GILLIAN DUNCAN LICSW
NPI 1194919118
Social Worker in Bellevue, WA

Active since September 03, 2007
13555 NE BEL RED RD STE 228, BELLEVUE, WA 98005(206) 901-2000 Get Directions Write a Review

NPPES record last updated: September 21, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

About Ms. Gillian Duncan Licsw NPPES

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

MS. GILLIAN DUNCAN LICSW (NPI 1194919118) is an individual social worker in Bellevue, Washington, licensed in Washington (70088853) and active in the NPI registry since September 2007.

NPPES Registry Identity

NPI1194919118
Entity TypeIndividualFemale
Primary Taxonomy104100000X
Provider Legal NameMS. GILLIAN DUNCANCredential: LICSW
Location Address13555 NE BEL RED RD STE 228Bellevue, WA 98005-2324
Mailing Address6400 Southcenter BlvdTukwila, WA 98188-2547 · (206) 901-2000
Phone(206) 901-2000
Sole ProprietorYes
Enumeration DateSeptember 3, 2007
Last NPPES UpdateSeptember 21, 2026
NPPES CertifiedSeptember 21, 2026
✔ NPI 1194919118 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in WA · 70088853
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.
13555 NE BEL RED RD STE 228, Bellevue, WA 98005
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Other Identifiers 1

Other61508159WA · Lswaic

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.

ELLEN WASTELL
Counselor
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 901-2000
MRS. ADRIENNE FIONA HELANDER MA, LMHC
Counselor (Mental Health)
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 887-7147
MICHELE WOOD
Counselor
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 901-2000
JENNIFER MOLINA MILLER
Peer Specialist
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 901-2000
PETER NGUYEN
Counselor
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 901-2000
KATE GOLDSTEIN
Counselor
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 901-2000
ZACHARY JAMES HENSLER MSW
Social Worker
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 901-2000
JULIE MARIE MEEKS
Counselor
13555 NE BEL RED RD STE 228
BELLEVUE, WA 98005
King County (206) 901-2000

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 Gillian Duncan's NPI number?

The NPI number for Gillian Duncan is 1194919118. It was assigned to this individual provider in the NPPES registry on September 3, 2007.

Where is Gillian Duncan located?

Gillian Duncan practices at 13555 NE Bel Red Rd Ste 228, Bellevue, WA 98005. The listed phone number is (206) 901-2000.

What is Gillian Duncan'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 Gillian Duncan was last updated on September 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days 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.