Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Sienna Mendez

Individual provider Mental Health Counselor · NPI 1003623950

Sienna Mendez is a Mental Health Counselor in Seattle, Washington. Licensed in Washington. Registered with an NPI since 2024.

Licensed in
WA
In the registry since
2024

Practice location Address checks out

5608 17th Ave NW Ste 1668
Seattle, WA 98107-5232
Phone: (206) 672-3202
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence MHCA.MC.700878937 (WA)

Record details

NPI number1003623950
Entity typeIndividual (Type 1)
GenderNot disclosed
Sole proprietorNo
NPI enumeratedDecember 13, 2024
Last updated in NPPESApril 21, 2026
Certification dateApril 21, 2026

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