NPIMap

Organization Active NPI

Occupational Health Centers of California, a Medical Corporation

Doing business as Concentra Medical Center, A Medical Corporation

  • Occupational Medicine Clinic/Center
  • Ontario, CA
National Provider Identifier
1245374693
Registry record updated Jun 19, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Occupational Medicine Clinic/CenterTaxonomy code 261QX0100X
Legal business name
OCCUPATIONAL HEALTH CENTERS OF CALIFORNIA, A MEDICAL CORPORATION
Doing business as
Concentra Medical Center, A Medical Corporation
Practice address
1101 S. Milliken Avenue
Suite C
Ontario, CA 91761
Phone
(909) 390-2799
Fax
(909) 390-0929
NPI assigned
Feb 19, 2007
Last updated
Jun 19, 2025By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jun 19, 2025

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

Authorized official

Name
John Anderson, DO
Title
Vice President
Phone
(972) 364-8000

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Health Service Clinic/Center 261QH0100X
Physical Therapy Clinic/Center 261QP2000X
Occupational Medicine Clinic/Center 261QX0100X Primary

Addresses

Primary practice location

1101 S. Milliken Avenue
Suite C
Ontario, CA 91761

Mailing address

5080 Spectrum Drive
Suite 1200 West Tower
Addison, TX 75001
Phone (972) 364-8000

Other names 1

  • Concentra Medical Center, A Medical Corporation Doing business as

National Provider Directory

National Provider Directory
Tax ID family
Concentra Medical Center158 organizations share this tax ID, including this one

Organizations with this tax ID in the same state 24

This tax ID family is large, so up to 24 of its organizations in the same state are linked here.

View all 24

NPI Registry JSON

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

{
    "created_epoch": "1171843200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1750291200000",
    "number": "1245374693",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5080 SPECTRUM DRIVE",
            "address_2": "SUITE 1200 WEST TOWER",
            "city": "ADDISON",
            "state": "TX",
            "postal_code": "75001",
            "telephone_number": "972-364-8000",
            "fax_number": "214-775-4502"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1101 S. MILLIKEN AVENUE",
            "address_2": "SUITE C",
            "city": "ONTARIO",
            "state": "CA",
            "postal_code": "91761",
            "telephone_number": "909-390-2799",
            "fax_number": "909-390-0929"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "OCCUPATIONAL HEALTH CENTERS OF CALIFORNIA, A MEDICAL CORPORATION",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-02-19",
        "last_updated": "2025-06-19",
        "certification_date": "2025-06-19",
        "status": "A",
        "authorized_official_last_name": "ANDERSON",
        "authorized_official_first_name": "JOHN",
        "authorized_official_title_or_position": "VICE PRESIDENT",
        "authorized_official_telephone_number": "972-364-8000",
        "authorized_official_credential": "DO"
    },
    "taxonomies": [
        {
            "code": "261QH0100X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Health Service",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "261QP2000X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Physical Therapy",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "261QX0100X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Occupational Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Concentra Medical Center, A Medical Corporation",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Ontario, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 19, 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.