NPIMap

Organization Active NPI

William Cox Dental Corporation

  • Dentist
  • Hayward, CA
National Provider Identifier
1689616013
Registry record updated Aug 22, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
DentistTaxonomy code 122300000X
Legal business name
WILLIAM COX DENTAL CORPORATION
Doing business as
Gentle Dental Hayward
Practice address
24239 Hesperian Blvd
Hayward, CA 94545-1526
Phone
(510) 785-2587
Fax
(510) 786-2960
NPI assigned
Jun 11, 2006
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Aug 22, 2025

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

Authorized official

Name
Dr. William J Cox, DDS
Title
PC Holder/Owner
Phone
(800) 684-6440

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
DentistGroup: 193200000X MULTI-SPECIALTY GROUP 122300000X Primary

Addresses

Primary practice location

24239 Hesperian Blvd
Hayward, CA 94545-1526

Mailing address

PO Box 872710
Vancouver, WA 98687-2710
Phone (360) 869-7645

Other names 1

  • Gentle Dental Hayward Doing business as

National Provider Directory

National Provider Directory
Tax ID family
Gentle Dental Brentwood24 organizations share this tax ID, including this one

Other organizations with this tax ID 23

Organizations that report the same tax identification number in the National Provider Directory.

View all 23

Locations

24239 Hesperian Blvd
Hayward, CA 94545
Phone (510) 785-2587

9800 S La Cienega Blvd
Ste 899
Inglewood, CA 90301
Phone (360) 449-5711

Practitioners & affiliated clinicians

Practitioners 3

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

NPI Registry JSON

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

{
    "created_epoch": "1149984000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1755820800000",
    "number": "1689616013",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 872710",
            "city": "VANCOUVER",
            "state": "WA",
            "postal_code": "986872710",
            "telephone_number": "360-869-7645",
            "fax_number": "877-725-7443"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "24239 HESPERIAN BLVD",
            "city": "HAYWARD",
            "state": "CA",
            "postal_code": "945451526",
            "telephone_number": "510-785-2587",
            "fax_number": "510-786-2960"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "WILLIAM COX DENTAL CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-06-11",
        "last_updated": "2025-08-22",
        "certification_date": "2025-08-22",
        "status": "A",
        "authorized_official_last_name": "COX",
        "authorized_official_first_name": "WILLIAM",
        "authorized_official_middle_name": "J",
        "authorized_official_title_or_position": "PC HOLDER/OWNER",
        "authorized_official_telephone_number": "800-684-6440",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "DDS"
    },
    "taxonomies": [
        {
            "code": "122300000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Dentist",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Gentle Dental Hayward",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "Gentle Dental Hayward",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Hayward, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 22, 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.