Aaron Koay, MS, BCBA

Primary specialty

Behavior AnalystTaxonomy code 103K00000X

License

1-21-47250 Issued in CA

Practice address

21615 Brookside CT
Walnut, CA 91789-1413

Phone

(909) 569-5814

NPI assigned

Feb 7, 2020

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Master of Science

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Ak Behavior Analysts LLC

  • Behavior Analyst
  • Alhambra, CA
  • NPI 1629799564
  NPD Authorized official

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1581033600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786579200000",
    "number": "1922630938",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "21615 BROOKSIDE CT",
            "city": "WALNUT",
            "state": "CA",
            "postal_code": "917891413",
            "telephone_number": "909-569-5814"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21615 BROOKSIDE CT",
            "city": "WALNUT",
            "state": "CA",
            "postal_code": "917891413",
            "telephone_number": "909-569-5814"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1411 S Garfield Ave Ste 101",
            "address_purpose": "LOCATION",
            "city": "Alhambra",
            "state": "CA",
            "postal_code": "918015023",
            "country_code": "US",
            "telephone_number": "909-569-5814",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KOAY",
        "first_name": "AARON",
        "credential": "MS, BCBA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-02-07",
        "last_updated": "2026-08-13",
        "certification_date": "2026-08-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103K00000X",
            "taxonomy_group": "",
            "desc": "Behavior Analyst",
            "state": "CA",
            "license": "1-21-47250",
            "primary": true
        },
        {
            "code": "106S00000X",
            "taxonomy_group": "",
            "desc": "Behavior Technician",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Esther Kim
• Eun Jung Kim
• Sungyun Kim
• Tae Hyung Kim
• Brandan James King, DPT
• Alena Koay, ATC
• Alisa Chia-Ling Koay
• Lilly Chan Koh, DPT
• Leanne Komoda
• Rashmi Kumra, DDS

• Behavior Analyst in Walnut, CA
• Providers in Walnut, CA by specialty
• Behavior Analyst in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.