What is Ari Williams's NPI number?

Ari Williams's National Provider Identifier (NPI) is 1861365173, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Ari Williams's specialty?

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

Where is Ari Williams located?

Ari Williams's practice location on file with NPPES is 313 Lennon Ln Ste 100, Walnut Creek, CA 94598-2460.

What is Ari Williams's phone number?

The practice phone number listed in the NPPES registry for Ari Williams is (925) 278-6489.

Is Ari Williams's NPI active?

Yes — Ari Williams's NPI (1861365173) is active in the NPPES registry as of the last update on 2025-09-24.

IndividualActive

Ari Williams

NPI 1861365173 · Behavior Technician · Walnut Creek, CA

Ari Williams is a Behavior Technician provider in Walnut Creek, CA (NPI 1861365173).

Provider details

NPI number: 1861365173
Entity type: Individual
Primary specialty: Behavior TechnicianBehavioral Health & Social Service Providers
Sole proprietor: No

Specialties & taxonomies

Behavior TechnicianPrimary106S00000X
Behavioral Health & Social Service Providers

Profile Score

Basic profile(47/100 index)

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

Registry tenure38% of score
Under 1 yr in registry
Profile completeness38% of score
83% 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

313 Lennon Ln Ste 100

Walnut Creek, CA 94598-2460

Phone: (925) 278-6489

Street-level locationGet directions

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Mailing address