NPIMap

Organization Active NPI

Quest Diagnostics Massachusetts LLC

  • Clinical Medical Laboratory
  • Marlborough, MA
National Provider Identifier
1194062448
Registry record updated Sep 21, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Medical LaboratoryTaxonomy code 291U00000X
Legal business name
QUEST DIAGNOSTICS MASSACHUSETTS LLC
Practice address
200 Forest St
3Rd Floor,Suite a
Marlborough, MA 01752-3023
Phone
(774) 369-3900
NPI assigned
Jan 7, 2013
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Sep 21, 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

200 Forest St
3Rd Floor,Suite a
Marlborough, MA 01752-3023

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 MA

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20130627000095 MA Part B Supplier - Independent Clinical Laboratory 8628217486 34 other NPIs on this enrollment
Practice locations: Holden, MA; Worcester, MA; Westborough, MA; Southborough, MA; Shrewsbury, MA; Milford, MA; Leominster, MA; Hyannis, MA…

Other NPIs on the same Medicare enrollment 33

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

View all 33

National Provider Directory

National Provider Directory
Tax ID family
Quest Diagnostics Massachusetts LLC16 organizations share this tax ID, including this one

Other organizations with this tax ID 15

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

View all 15

Locations

100 Ter Heun Dr
Bsmt
Falmouth, MA 02540

6701 Carnegie Ave
Ste 500
Cleveland, OH 44103
Phone (216) 426-6081

Practitioners & affiliated clinicians

Practitioners 1

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": "1357516800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1789948800000",
    "number": "1194062448",
    "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",
            "fax_number": "610-271-4245"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 FOREST ST",
            "address_2": "3RD FLOOR,SUITE A",
            "city": "MARLBOROUGH",
            "state": "MA",
            "postal_code": "017523023",
            "telephone_number": "774-369-3900"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "QUEST DIAGNOSTICS MASSACHUSETTS LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2013-01-07",
        "last_updated": "2026-09-21",
        "certification_date": "2026-09-21",
        "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 Marlborough, MA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 21, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.