NPIMap

Organization Active NPI

Quest Diagnostics Incorporated MD

  • Clinical Medical Laboratory
  • Baltimore, MD
National Provider Identifier
1245307818
Registry record updated Mar 13, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Medical LaboratoryTaxonomy code 291U00000X
License
21D0218877 Issued in MD
Legal business name
QUEST DIAGNOSTICS INCORPORATED MD
Practice address
1715 Twin Springs Rd
Baltimore, MD 21227-3553
Phone
(800) 722-7393
NPI assigned
Nov 29, 2006
Organization subpart
Yes
Parent organization
QUEST DIAGNOSTICS INCORPORATEDAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Mar 13, 2025

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

Authorized official

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Medical Laboratory 291U00000X 21D0218877 MD Primary

Addresses

Primary practice location

1715 Twin Springs Rd
Baltimore, MD 21227-3553

Mailing address

14275 Midway Rd Ste 400
Addison, TX 75001-3661

Other identifiers 2

IdentifierTypeStateIssuer
406690079OtherMDRR MCR
21D0218877OtherMDCLIA

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20090108000053 MD Part B Supplier - Independent Clinical Laboratory 3274696877 2 other NPIs on this enrollment
Practice locations: Baltimore, MD

Other NPIs with the same Medicare PAC ID 2

NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).

Other NPIs on the same Medicare enrollment 2

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
21D0218877Quest Diagnostics Inc1715 Twin Springs Rd, Baltimore, MD 21227AccreditationOct 19, 2026

National Provider Directory

National Provider Directory
Tax ID family
Quest Diagnostics Inc MD7 organizations share this tax ID, including this one
Part of
Questdiagnost Ic Inc

Other organizations with this tax ID 6

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

Locations

7022 Collection Ctr
Chicago, IL 60693

NPI Registry JSON

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

{
    "created_epoch": "1164758400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1741824000000",
    "number": "1245307818",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "14275 MIDWAY RD STE 400",
            "city": "ADDISON",
            "state": "TX",
            "postal_code": "750013661",
            "fax_number": "610-271-4245"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1715 TWIN SPRINGS RD",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212273553",
            "telephone_number": "800-722-7393"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "QUEST DIAGNOSTICS INCORPORATED MD",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "QUEST DIAGNOSTICS INCORPORATED",
        "enumeration_date": "2006-11-29",
        "last_updated": "2025-03-13",
        "certification_date": "2025-03-13",
        "status": "A",
        "authorized_official_last_name": "TIMMERMAN",
        "authorized_official_first_name": "LEAH",
        "authorized_official_middle_name": "D",
        "authorized_official_title_or_position": "VICE PRESIDENT",
        "authorized_official_telephone_number": "973-520-2700"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": "MD",
            "license": "21D0218877",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RR MCR",
            "identifier": "406690079",
            "state": "MD"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CLIA",
            "identifier": "21D0218877",
            "state": "MD"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Baltimore, MD

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 13, 2025; 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.