Judith Diaz Sierra
Behavior Analyst · Walnut Creek, CA
Judith Diaz Sierra is a behavior analyst with a practice address in Walnut Creek, California, and NPI 1891394151, issued on Oct 19, 2020. Check the license with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Judith Diaz Sierra
- Primary taxonomy
- Behavior Analyst 103K00000X
- Practice location
- 313 Lennon LN Ste 100, Walnut Creek, CA 94598
- Phone
- (925) 465-1585
- Enumerated
- Oct 19, 2020
- Record last updated
- Oct 19, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 313 Lennon LN Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ammarah Abdul -RaheemBehavior Technician1780490813
- Sana AbdulhaiBehavior Technician1801743661
- Sara AboeiBehavior Technician1306435938
- Ria AdamsBehavior Technician1447901806
- Praise AdebilejeBehavior Technician1710815311
- Miguel AguilarBehavior Technician1003580309
Verify Judith Diaz Sierra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
203 behavior analyst records list a practice address in Walnut Creek
They are 203 of the 6,170 NPPES records with a practice address in Walnut Creek, and 20,348 behavior analyst records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 203 in Walnut Creek → All 20,348 in California → Every provider in Walnut Creek →
Other behavior analyst records in California
- Eduardo A HernandezTorrance, CA1811564081
- Ali AaronNapa, CA1689112575
- Melanie Ann AbadSan Mateo, CA1366808545
- Marine Abadzhyan, ANorth Hollywood, CA1437533494
- Ashley Aurora AbalosRancho Cucamonga, CA1225974124
- Valerie Abaniel, M.A BCBAFullerton, CA1336377340
- Althea Abaqueta, BCBAFountain Valley, CA1619272853
- Stephanie AbarcaCorona, CA1124987656
- Vanessa AbarcaSan Jose, CA1558900910
- Josette Abbas, BCBAWalnut Creek, CA1407357916
Common questions
What is Judith Diaz Sierra's NPI number?
Judith Diaz Sierra's National Provider Identifier (NPI) is 1891394151, issued on Oct 19, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Judith Diaz Sierra located?
The NPPES record lists a practice address at 313 Lennon LN Ste 100, Walnut Creek, CA, 94598. Phone: (925) 465-1585. Providers update this record themselves, so call before visiting.
How can I verify Judith Diaz Sierra's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.