NPIMap

Organization Active NPI

Quest Diagnostics Clinical Laboratories Inc

  • Clinical Medical Laboratory
  • Irving, TX
National Provider Identifier
1790721538
Registry record updated Sep 16, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Medical LaboratoryTaxonomy code 291U00000X
License
45D0697943 Issued in TX
Legal business name
QUEST DIAGNOSTICS CLINICAL LABORATORIES INC
Practice address
4770 Regent Blvd
Irving, TX 75063-2445
Phone
(800) 824-6152
NPI assigned
Jun 21, 2006
Last updated
Sep 16, 2026By the provider in NPPES
Organization subpart
Yes
Parent organization
QUEST DIAGNOSTICS INCORPORATEDAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Sep 16, 2026

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

Authorized official

Name
Leah D Timmerman
Title
Sr. Vice President
Phone
(973) 520-2700

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Medical Laboratory 291U00000X 45D0697943 TX Primary

Addresses

Primary practice location

4770 Regent Blvd
Irving, TX 75063-2445

Mailing address

4770 Regent Blvd
Irving, TX 75063-2445
Phone (866) 697-8378

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in TX

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20040210000373 TX Part B Supplier - Independent Clinical Laboratory 3173420585 29 other NPIs on this enrollment
This NPI is an additional NPI on the enrollment
Practice locations: Webster, TX; Weatherford, TX; The Woodlands, TX; Spring, TX; San Benito, TX; San Antonio, TX; Mesquite, TX; McAllen, TX…

Other NPIs on the same Medicare enrollment 22

NPIs listed together on one Medicare enrollment, typically parts of the same organization.

View all 22

Laboratory certificates & supplier records

Derived by NPIMap

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

CLIA numberLaboratoryCertificateExpires
45D0697943Quest Diagnostic Clinical Laboratories Inc4770 Regent Blvd, Irving, TX 75063AccreditationFeb 8, 2027

National Provider Directory

National Provider Directory
Tax ID family
SBCL Medical Arts100 organizations share this tax ID, including this one
Part of
Corning Lab Servicesinc

Organizations with this tax ID in the same state 20

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

View all 20

Locations

1831 N Zaragoza Rd
Ste 107
El Paso, TX 79936

5255 Woodrow Bean
Ste 15
El Paso, TX 79924

840 E Redd Rd
El Paso, TX 79912
Phone (915) 577-9003

Practitioners & affiliated clinicians

Practitioners 2

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

NPI Registry JSON

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

{
    "created_epoch": "1150848000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1789516800000",
    "number": "1790721538",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4770 REGENT BLVD",
            "city": "IRVING",
            "state": "TX",
            "postal_code": "750632445",
            "telephone_number": "866-697-8378"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4770 REGENT BLVD",
            "city": "IRVING",
            "state": "TX",
            "postal_code": "750632445",
            "telephone_number": "800-824-6152"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "QUEST DIAGNOSTICS CLINICAL LABORATORIES INC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "QUEST DIAGNOSTICS INCORPORATED",
        "enumeration_date": "2006-06-21",
        "last_updated": "2026-09-16",
        "certification_date": "2026-09-16",
        "status": "A",
        "authorized_official_last_name": "TIMMERMAN",
        "authorized_official_first_name": "LEAH",
        "authorized_official_middle_name": "D",
        "authorized_official_title_or_position": "SR. VICE PRESIDENT",
        "authorized_official_telephone_number": "973-520-2700"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": "TX",
            "license": "45D0697943",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Irving, TX

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 16, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.