What is Alex Williams's NPI number?

Alex Williams's National Provider Identifier (NPI) is 1578231619, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Alex Williams's specialty?

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

Where is Alex Williams located?

Alex Williams's practice location on file with NPPES is 999 164th Ave Ne, Bellevue, WA 98008-3518.

What is Alex Williams's phone number?

The practice phone number listed in the NPPES registry for Alex Williams is (206) 901-2000.

Is Alex Williams's NPI active?

Yes — Alex Williams's NPI (1578231619) is active in the NPPES registry as of the last update on 2026-01-02.

IndividualActive

Alex Williams

NPI 1578231619 · Social Worker · Bellevue, WA

Alex Williams is a Social Worker provider in Bellevue, WA (NPI 1578231619).

Provider details

NPI number: 1578231619
Entity type: Individual
Primary specialty: Social WorkerBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No
License: SC61569131 (WA)

Specialties & taxonomies

Social WorkerPrimary104100000XLicense SC61569131 (WA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(62/100 index)

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

Registry tenure38% of score
4 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

999 164th Ave Ne

Bellevue, WA 98008-3518

Phone: (206) 901-2000

Street-level locationGet directions

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Mailing address