What is Sierra Cox's NPI number?

Sierra Cox's National Provider Identifier (NPI) is 1831665413, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Sierra Cox's specialty?

Sierra Cox is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).

Where is Sierra Cox located?

Sierra Cox's practice location on file with NPPES is 1660 S Columbian Way, Seattle, WA 98108-1532.

What is Sierra Cox's phone number?

The practice phone number listed in the NPPES registry for Sierra Cox is (206) 277-1010.

Is Sierra Cox's NPI active?

Yes — Sierra Cox's NPI (1831665413) is active in the NPPES registry as of the last update on 2026-03-18.

IndividualActive

Sierra Cox

NPI 1831665413 · Clinical Social Worker · Seattle, WA

Sierra Cox is a Clinical Social Worker provider in Seattle, WA (NPI 1831665413).

Provider details

NPI number: 1831665413
Entity type: Individual
Primary specialty: Clinical Social WorkerBehavioral Health & Social Service Providers
Sex: Female
Sole proprietor: No
License: LW61552332 (WA)

Specialties & taxonomies

Clinical Social WorkerPrimary1041C0700XLicense LW61552332 (WA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(67/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
7 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

1660 S Columbian Way

Seattle, WA 98108-1532

Phone: (206) 277-1010

Street-level locationGet directions

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Mailing address