Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Abigail Joy Viray Montemayor
Behavior Technician in Concord, CA · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1235794033
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Registry record
Entity type Individual (Type 1)
Name Abigail Joy Viray Montemayor
Sex Female
Practice address 1855 2nd St Ste B, Concord, CA, 94519
Phone (925) 239-9640
Enumeration date May 7, 2019
Last updated in NPPES May 7, 2019
Taxonomy & licenses
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Abigail Montemayor practice?
The practice location on file with NPPES is in Concord, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Abigail Montemayor?
The National Provider Identifier (NPI) for Abigail Montemayor is 1235794033, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Dionne Brooks Clinical Social Worker · Concord, CA NPI 1972838829 Brandi Ellis Marriage & Family Therapist · Concord, CA NPI 1689997876 Brigette Girardey Marriage & Family Therapist · Concord, CA NPI 1013221233 Crystel Malek Marriage & Family Therapist · Concord, CA NPI 1013271006 Yi-Chun Murphy Behavior Analyst · Concord, CA NPI 1013251743 Courtney Vidal Behavior Analyst · Concord, CA NPI 1215271937 Nicholas Rammer Behavior Analyst · Concord, CA NPI 1184964777 Marc Musak Behavior Technician · Concord, CA NPI 1083012843
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-05-07.