IndividualActive
Julian Williams
NPI 1043017825 · Behavior Analyst · Castro Valley, CA
Julian Williams is a Behavior Analyst provider in Castro Valley, CA (NPI 1043017825).
Provider details
- NPI number
- 1043017825
- Entity type
- Individual
- Primary specialty
- Behavior AnalystBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Basic profile(48/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES 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
19772 Stanton Ave
Castro Valley, CA 94546-4072
Phone: (510) 586-3117
Street-level locationGet directions
Mailing address
3186 Airway Ave Ste a
Costa Mesa, CA 92626-4650
Registry dates
- Enumerated
- 2025-02-27
- Last updated
- 2025-02-27
- Certified
- 2025-02-27
Frequently asked questions
- What is Julian Williams's NPI number?
- Julian Williams's National Provider Identifier (NPI) is 1043017825, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Julian Williams's specialty?
- Julian Williams is listed in the NPPES registry with a primary specialty of Behavior Analyst (Behavioral Health & Social Service Providers).
- Where is Julian Williams located?
- Julian Williams's practice location on file with NPPES is 19772 Stanton Ave, Castro Valley, CA 94546-4072.
- What is Julian Williams's phone number?
- The practice phone number listed in the NPPES registry for Julian Williams is (510) 586-3117.
- Is Julian Williams's NPI active?
- Yes — Julian Williams's NPI (1043017825) is active in the NPPES registry as of the last update on 2025-02-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.