What is Justin Williams's NPI number?

Justin Williams's National Provider Identifier (NPI) is 1689527749, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Justin Williams's specialty?

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

Where is Justin Williams located?

Justin Williams's practice location on file with NPPES is 711 Pavey Ave, Mount Vernon, IL 62864-2837.

What is Justin Williams's phone number?

The practice phone number listed in the NPPES registry for Justin Williams is (618) 315-3709.

Is Justin Williams's NPI active?

Yes — Justin Williams's NPI (1689527749) is active in the NPPES registry as of the last update on 2026-02-18.

IndividualActive

Justin Williams

NPI 1689527749 · Behavior Analyst · Mount Vernon, IL

Justin Williams is a Behavior Analyst provider in Mount Vernon, IL (NPI 1689527749).

Provider details

NPI number: 1689527749
Entity type: Individual
Primary specialty: Behavior AnalystBehavioral Health & Social Service Providers
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Behavior AnalystPrimary103K00000X
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

711 Pavey Ave

Mount Vernon, IL 62864-2837

Phone: (618) 315-3709

Street-level locationGet directions

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Mailing address