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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

AARON KOAY MS, BCBA
NPI 1922630938
Behavior Analyst in Walnut, CA

Active since February 07, 2020
21615 BROOKSIDE CT, WALNUT, CA 91789(909) 569-5814 Get Directions Write a Review

NPPES record last updated: August 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Aug 13, 2026, Apr 10, 2023, Jul 21, 2022 and 1 more (4 updates tracked since 2020).

About Aaron Koay Ms, Bcba NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

AARON KOAY MS, BCBA (NPI 1922630938) is an individual behavior analyst provider in Walnut, California, licensed in California (1-21-47250) and active in the NPI registry since February 2020. He maintains a secondary practice location in Alhambra.

NPPES Registry Identity

NPI1922630938
Entity TypeIndividualMale
Primary Taxonomy103K00000X
Provider Legal NameAARON KOAYCredential: MS, BCBA
Location Address21615 BROOKSIDE CTWalnut, CA 91789-1413
Mailing Address21615 Brookside CtWalnut, CA 91789-1413 · (909) 569-5814
Phone(909) 569-5814
Sole ProprietorNo
Enumeration DateFebruary 7, 2020
Last NPPES UpdateAugust 13, 20264 updates tracked since enumeration
NPPES CertifiedAugust 13, 2026
✔ NPI 1922630938 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyBehavior AnalystBehavioral Health & Social Service Providers
Taxonomy Code103K00000X
License✔ Licensed in CA · 1-21-47250
Definition
A behavior analyst is qualified by at least a master's degree and Behavior Analyst Certification Board certification and/or a state-issued credential (such as a license) to practice behavior analysis independently. Behavior analysts provide the required supervision to assistant behavior analysts and behavior technicians. A behavior analyst delivers services consistent with the dimensions of applied behavior analysis. Common services may include, but are not limited to, conducting behavioral assessments, analyzing data, writing and revising behavior-analytic treatment plans, training others to implement components of treatment plans, and overseeing implementation of treatment plans.
Also ListedBehavior TechnicianTaxonomy 106S00000X
21615 BROOKSIDE CT, Walnut, CA 91789
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Secondary Practice Location 1

Location 11411 S Garfield Ave Ste 101Alhambra, CA 91801-5023 · Phone (909) 569-5814

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. ALENA KOAY ATC
Specialist/Technologist (Athletic Trainer)
21615 BROOKSIDE CT
WALNUT, CA 91789
Los Angeles County (909) 569-5947
ALISA CHIA-LING KOAY
Pharmacist
21615 BROOKSIDE CT
WALNUT, CA 91789
Los Angeles County (909) 569-8023

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Aaron Koay's NPI number?

The NPI number for Aaron Koay is 1922630938. It was assigned to this individual provider in the NPPES registry on February 7, 2020.

Where is Aaron Koay located?

Aaron Koay practices at 21615 Brookside Ct, Walnut, CA 91789. The listed phone number is (909) 569-5814.

What is Aaron Koay's specialty?

The primary specialty registered for this NPI is Behavior Analyst with taxonomy code 103K00000X.

When was this NPI record last updated?

The NPPES record for Aaron Koay was last updated on August 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.