IndividualActive
James Willis
NPI 1639773583 · Behavior Technician · Walnut Creek, CA
James Willis is a Behavior Technician provider in Walnut Creek, CA (NPI 1639773583).
Provider details
- NPI number
- 1639773583
- Entity type
- Individual
- Primary specialty
- Behavior TechnicianBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(61/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
3075 Citrus Cir Ste 240
Walnut Creek, CA 94598-2667
Phone: (925) 256-1100
Fax: (925) 256-1100
Street-level locationGet directions
Mailing address
3075 Citrus Cir Ste 240
Walnut Creek, CA 94598-2667
Additional practice locations (1)
- 4410 Red Maple CtConcord, CA 94521-4434Phone: (925) 586-5507
Registry dates
- Enumerated
- 2020-11-22
- Last updated
- 2020-11-22
- Certified
- 2020-11-22
Frequently asked questions
- What is James Willis's NPI number?
- James Willis's National Provider Identifier (NPI) is 1639773583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Willis's specialty?
- James Willis is listed in the NPPES registry with a primary specialty of Behavior Technician (Behavioral Health & Social Service Providers).
- Where is James Willis located?
- James Willis's practice location on file with NPPES is 3075 Citrus Cir Ste 240, Walnut Creek, CA 94598-2667.
- What is James Willis's phone number?
- The practice phone number listed in the NPPES registry for James Willis is (925) 256-1100.
- Is James Willis's NPI active?
- Yes — James Willis's NPI (1639773583) is active in the NPPES registry as of the last update on 2020-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.