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MS. JENNIFER L. TREBBY MSW
NPI 1437427184
Social Worker - Clinical in Seattle, WA

Active since December 08, 2011Opted out of Medicare · through Oct 1, 2027
5426 CALIFORNIA AVE SW, SEATTLE, WA 98136(206) 590-0917(866) 392-7931 Get Directions Write a Review

NPPES record last updated: May 17, 2024. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 17, 2024, Jul 21, 2022, Jun 19, 2017 (3 updates tracked since 2017).

About Ms. Jennifer L. Trebby Msw NPPES

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

MS. JENNIFER L. TREBBY MSW (NPI 1437427184) is an individual clinical provider in Seattle, Washington, licensed in Washington (LW60311943) and active in the NPI registry since December 2011. She has opted out of Medicare through October 1, 2027.

NPPES Registry Identity

NPI1437427184
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. JENNIFER L. TREBBYCredential: MSW
Location Address5426 CALIFORNIA AVE SWSeattle, WA 98136-1513
Mailing Address6026 Fauntleroy Way Sw Unit BSeattle, WA 98136-1615 · (781) 640-8753 · Fax (866) 392-7931
Phone(206) 590-0917
Fax(866) 392-7931
Sole ProprietorNo
Enumeration DateDecember 8, 2011
Last NPPES UpdateMay 17, 20243 updates tracked since enumeration
NPPES CertifiedMay 17, 2024
✔ NPI 1437427184 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in WA · LW60311943
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
5426 CALIFORNIA AVE SW, Seattle, WA 98136
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Other Identifiers 1

Medicaid1437427184WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Ms. Jennifer L. Trebby Msw has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 1, 2025 through October 1, 2027.

Opt-Out Effective DateOctober 1, 2025
Opt-Out In Effect ThroughOctober 1, 2027Opt-out affidavits renew automatically every two years unless cancelled

Other Providers at the Same Location NPPES 8

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

MRS. LILLIANNE R BARNUM MA, LMHCA
Counselor (Mental Health)
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (206) 409-3824
NOURISHING COMPASSION THERAPY PLLC
Clinic/Center (Adult Mental Health)
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (360) 209-3381
KENYA MCINTYRE
Student in an Organized Health Care Education/Training Program
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (206) 462-5830
DR. MARTIN ANDREW PHILLIPS PHD
Student in an Organized Health Care Education/Training Program
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (583) 020-6462
SARAH KAY HUGHES
Counselor (Mental Health)
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (509) 795-0368
LIZETTE ARROYO-DILLARD MA, LMHCA
Counselor (Mental Health)
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (206) 672-5111
MS. AMANDA MAY FRAME MASTERS INTERN
Counselor (Mental Health)
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (206) 714-1465
MRS. ARIEL SINGH
Student in an Organized Health Care Education/Training Program
5426 CALIFORNIA AVE SW
SEATTLE, WA 98136
King County (206) 462-5830

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 Jennifer Trebby's NPI number?

The NPI number for Jennifer Trebby is 1437427184. It was assigned to this individual provider in the NPPES registry on December 8, 2011.

Where is Jennifer Trebby located?

Jennifer Trebby practices at 5426 California Ave SW, Seattle, WA 98136. The listed phone number is (206) 590-0917.

What is Jennifer Trebby's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Jennifer Trebby enrolled in Medicare?

No. Jennifer Trebby has opted out of Medicare through October 1, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

What insurance does Jennifer Trebby accept?

Health plans from PacificSource Health Plans and Premera Blue Cross Blue Shield of Alaska list Jennifer Trebby as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Jennifer Trebby was last updated on May 17, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.