NPIMap

Organization Active NPI

Unilab Corporation

Doing business as Quest Diagnostics

  • Clinical Medical Laboratory
  • Bakersfield, CA
National Provider Identifier
1508905829
Registry record updated Oct 5, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Medical LaboratoryTaxonomy code 291U00000X
License
05D0909695 Issued in CA
Legal business name
UNILAB CORPORATION
Doing business as
Quest Diagnostics
Practice address
9500 Stockdale Hwy
Suite 107
Bakersfield, CA 93311-3621
Phone
(661) 664-1320
Fax
(661) 664-1581
NPI assigned
Feb 5, 2007
Last updated
Oct 5, 2026By the provider in NPPES
Organization subpart
Yes
Parent organization
QUEST DIAGNOSTICS INCORPORATEDAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Oct 5, 2026

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

Authorized official

Name
Leah Timmerman
Title
Vice President
Phone
(610) 454-4122

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Medical Laboratory 291U00000X 05D0909695 CA Primary

Addresses

Primary practice location

9500 Stockdale Hwy
Suite 107
Bakersfield, CA 93311-3621

Mailing address

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

Other names 1

  • Quest Diagnostics Doing business as

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20160106002455 CA Part B Supplier - Independent Clinical Laboratory 7618874512 1 other NPI on this enrollment
This NPI is an additional NPI on the enrollment
Practice locations: Bakersfield, CA; Sacramento, CA

Other NPIs on the same Medicare enrollment 1

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

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
05D0909695Unilab Corporation Dba Quest Diagnostics9500 Stockdale Highway Ste 107, Bakersfield, CA 93311AccreditationJan 10, 2028

National Provider Directory

National Provider Directory
Tax ID family
Quest Diagnostics Incorporated22 organizations share this tax ID, including this one
Part of
Corning Nichols

Other organizations with this tax ID 21

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

View all 21

Member of 1

Organizations this organization is a member of, according to the National Provider Directory.

NPI Registry JSON

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

{
    "created_epoch": "1170633600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1791158400000",
    "number": "1508905829",
    "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": "9500 STOCKDALE HWY",
            "address_2": "SUITE 107",
            "city": "BAKERSFIELD",
            "state": "CA",
            "postal_code": "933113621",
            "telephone_number": "661-664-1320",
            "fax_number": "661-664-1581"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "UNILAB CORPORATION",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "QUEST DIAGNOSTICS INCORPORATED",
        "enumeration_date": "2007-02-05",
        "last_updated": "2026-10-05",
        "certification_date": "2026-10-05",
        "status": "A",
        "authorized_official_last_name": "TIMMERMAN",
        "authorized_official_first_name": "LEAH",
        "authorized_official_title_or_position": "VICE PRESIDENT",
        "authorized_official_telephone_number": "610-454-4122"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": "CA",
            "license": "05D0909695",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Quest Diagnostics",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "Quest Diagnostics",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Bakersfield, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 5, 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.