Individual provider Active NPI

Derek Siu-Chun Lee

  • Behavior Analyst
  • Newark, CA
National Provider Identifier
1538738992
Registry record updated Jun 12, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Behavior AnalystTaxonomy code 103K00000X
License
1-25-79783 Issued in CA
Practice address
39899 Balentine Dr Ste 110
Newark, CA 94560-5356
Phone
(510) 244-1145
NPI assigned
Jun 21, 2021
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 12, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Behavior Analyst 103K00000X
Behavior Technician 106S00000X
Behavior Analyst 103K00000X 1-25-79783 CA Primary

Addresses

Primary practice location

39899 Balentine Dr Ste 110
Newark, CA 94560-5356

Mailing address

PO Box 33568
San Diego, CA 92163-3568
Phone (855) 223-7123

Other practice location 1

477 Callan Ave # 101
San Leandro, CA 94577-4607
Phone (818) 241-6780

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

NPI Registry JSON

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

{
    "created_epoch": "1624233600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1749686400000",
    "number": "1538738992",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 33568",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921633568",
            "telephone_number": "855-223-7123",
            "fax_number": "619-374-7134"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "39899 BALENTINE DR STE 110",
            "city": "NEWARK",
            "state": "CA",
            "postal_code": "945605356",
            "telephone_number": "510-244-1145"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "477 Callan Ave # 101",
            "address_purpose": "LOCATION",
            "city": "San Leandro",
            "state": "CA",
            "postal_code": "945774607",
            "country_code": "US",
            "telephone_number": "818-241-6780",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LEE",
        "first_name": "DEREK",
        "middle_name": "SIU-CHUN",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-06-21",
        "last_updated": "2025-06-12",
        "certification_date": "2025-06-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103K00000X",
            "taxonomy_group": "",
            "desc": "Behavior Analyst",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "106S00000X",
            "taxonomy_group": "",
            "desc": "Behavior Technician",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "103K00000X",
            "taxonomy_group": "",
            "desc": "Behavior Analyst",
            "state": "CA",
            "license": "1-25-79783",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Newark, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 12, 2025; 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.