NPIMap

Organization Active NPI

Quest Diagnostics LLC

  • Clinical Medical Laboratory
  • Natick, MA
National Provider Identifier
1730928565
Registry record updated Oct 15, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Medical LaboratoryTaxonomy code 291U00000X
Legal business name
QUEST DIAGNOSTICS LLC
Practice address
1400 Worcester St
Natick, MA 01760-1532
Phone
(555) 555-1212
NPI assigned
May 21, 2024
Last updated
Oct 15, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Oct 15, 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 Primary

Addresses

Primary practice location

1400 Worcester St
Natick, MA 01760-1532

Mailing address

4770 Regent Blvd
Irving, TX 75063-2445

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20050719000827 MA Part B Supplier - Independent Clinical Laboratory 9234114075 6 other NPIs on this enrollment
This NPI is an additional NPI on the enrollment
Practice locations: Fall River, MA; North Dartmouth, MA; Natick, MA; Marlborough, MA

Other NPIs on the same Medicare enrollment 5

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
22D2305630Quest Diagnostics Massachusetts LLC1400 Worcester Street, Natick, MA 01760ComplianceJan 5, 2028

National Provider Directory

National Provider Directory
Tax ID family
Quest Diagnostics LLC18 organizations share this tax ID, including this one

Other organizations with this tax ID 17

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

View all 17

Locations

35 Millbury St
Auburn, MA 01501
Phone (508) 721-1172

415 Massachusetts Ave
Cambridge, MA 02139
Phone (617) 520-8242

101 President Ave
Fall River, MA 02720
Phone (508) 324-4105

49 Harry Kemp Way
Rm 2
Provincetown, MA 02657
Phone (508) 487-2062

3130 State Hwy
Rm 2
Wellfleet, MA 02667
Phone (508) 349-6404

191 May St
Worcester, MA 01602
Phone (508) 368-7888

630 Plantation St
Worcester, MA 01605
Phone (508) 368-5529

6 Tsienneto Rd
Ste 102LL
Derry, NH 03038

1524 Atwood Ave
Providence, RI 02919
Phone (401) 272-2110

Practitioners & affiliated clinicians

Practitioners 4

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": "1716249600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1792022400000",
    "number": "1730928565",
    "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"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1400 WORCESTER ST",
            "city": "NATICK",
            "state": "MA",
            "postal_code": "017601532",
            "telephone_number": "555-555-1212"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "QUEST DIAGNOSTICS LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2024-05-21",
        "last_updated": "2026-10-15",
        "certification_date": "2026-10-15",
        "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": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Natick, MA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 15, 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.