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SIENNA MENDEZ
NPI 1003623950
Counselor - Mental Health in Seattle, WA

Active since December 13, 2024
5608 17TH AVE NW STE 1668, SEATTLE, WA 98107(206) 672-3202 Get Directions Write a Review

NPPES record last updated: April 21, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Apr 21, 2026, Jun 21, 2025, Dec 13, 2024 (3 updates tracked since 2024).

About Sienna Mendez NPPES

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

SIENNA MENDEZ (NPI 1003623950) is an individual mental health provider in Seattle, Washington, licensed in Washington (MHCA.MC.700878937) and active in the NPI registry since December 2024.

NPPES Registry Identity

NPI1003623950
Entity TypeIndividual
Primary Taxonomy101YM0800X
Provider Legal NameSIENNA MENDEZ
Location Address5608 17TH AVE NW STE 1668Seattle, WA 98107-5232
Mailing Address5608 17th Ave Nw Ste 1668Seattle, WA 98107-5232 · (206) 672-3202
Phone(206) 672-3202
Sole ProprietorNo
Enumeration DateDecember 13, 2024
Last NPPES UpdateApril 21, 20263 updates tracked since enumeration
NPPES CertifiedApril 21, 2026
✔ NPI 1003623950 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
License✔ Licensed in WA · MHCA.MC.700878937
5608 17TH AVE NW STE 1668, Seattle, WA 98107
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Other Providers at the Same Location NPPES 9

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

DANESHIA C L VASHCHENKO
Social Worker (Clinical)
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (206) 672-3202
NIYA PARK
Student in an Organized Health Care Education/Training Program
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (206) 672-3202
SARAH TATUM MACKAY
Counselor (Mental Health)
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (206) 672-3202
FIONA CAMILLE HANSEN
Student in an Organized Health Care Education/Training Program
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (425) 343-4737
DANICA SCHOENBACHER
Student in an Organized Health Care Education/Training Program
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (206) 672-3202
ERIKA MORSE LMHCA
Counselor (Mental Health)
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (206) 672-3202
LINDSEY FERRIS LMFT
Marriage & Family Therapist
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (206) 672-3203
MEGAN KAMERMAN
Student in an Organized Health Care Education/Training Program
5608 17TH AVE NW STE 1668
SEATTLE, WA 98107
King County (206) 672-3202

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 Sienna Mendez's NPI number?

The NPI number for Sienna Mendez is 1003623950. It was assigned to this individual provider in the NPPES registry on December 13, 2024.

Where is Sienna Mendez located?

Sienna Mendez practices at 5608 17th Ave NW Ste 1668, Seattle, WA 98107. The listed phone number is (206) 672-3202.

What is Sienna Mendez's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

When was this NPI record last updated?

The NPPES record for Sienna Mendez was last updated on April 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.