IndividualActive
Judith Diaz Sierra
NPI 1891394151 · Behavior Analyst · Walnut Creek, CA
Judith Diaz Sierra is a Behavior Analyst provider in Walnut Creek, CA (NPI 1891394151).
Provider details
- NPI number
- 1891394151
- Entity type
- Individual
- Primary specialty
- Behavior AnalystBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(57/100 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
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) 465-1585
Street-level locationGet directions
Mailing address
313 Lennon Ln Ste 100
Walnut Creek, CA 94598-2460
Registry dates
- Enumerated
- 2020-10-19
- Last updated
- 2020-10-19
- Certified
- 2020-10-19
Frequently asked questions
- What is Judith Diaz Sierra's NPI number?
- Judith Diaz Sierra's National Provider Identifier (NPI) is 1891394151, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Judith Diaz Sierra's specialty?
- Judith Diaz Sierra is listed in the NPPES registry with a primary specialty of Behavior Analyst (Behavioral Health & Social Service Providers).
- Where is Judith Diaz Sierra located?
- Judith Diaz Sierra's practice location on file with NPPES is 313 Lennon Ln Ste 100, Walnut Creek, CA 94598-2460.
- What is Judith Diaz Sierra's phone number?
- The practice phone number listed in the NPPES registry for Judith Diaz Sierra is (925) 465-1585.
- Is Judith Diaz Sierra's NPI active?
- Yes — Judith Diaz Sierra's NPI (1891394151) is active in the NPPES registry as of the last update on 2020-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.