NPIMap

Organization Active NPI

Genedx LLC

  • Clinical Medical Laboratory
  • Gaithersburg, MD
National Provider Identifier
1487632998
Registry record updated Jan 27, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Medical LaboratoryTaxonomy code 291U00000X
License
953 Issued in MD
Legal business name
GENEDX LLC
Practice address
205 & 207 Perry Pkwy
Gaithersburg, MD 20877-2142
Phone
(301) 519-2100
Fax
(201) 421-2010
NPI assigned
Jan 4, 2006
Last updated
Jan 27, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jan 27, 2026

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

Authorized official

Name
Christine Ann McGrogan
Title
Payor Credentialing Specialist
Phone
(240) 658-0686

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Ph.D. Medical GeneticsGroup: 193400000X SINGLE SPECIALTY GROUP 170100000X 870020
Clinical Medical Laboratory 291U00000X 953 MD Primary

Addresses

Primary practice location

205 & 207 Perry Pkwy
Gaithersburg, MD 20877-2142

Mailing address

PO Box 21997
New York, NY 10087-0001
Phone (888) 729-1206

Other identifiers 2

IdentifierTypeStateIssuer
21D0969951OtherCMS CLIA CERTIFICATION
953OtherMDMARYLAND STATE LICENSE

Other names 1

  • GeneDx, Inc. Former legal business name

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20090623000463 DC Part B Supplier - Independent Clinical Laboratory 0446301931 Practice locations: Gaithersburg, MD

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
21D0969951Genedx, LLC205 & 207 Perry Parkway, Gaithersburg, MD 20877AccreditationDec 9, 2026

National Provider Directory

National Provider Directory

Member of 2

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

Locations

333 Ludlow St
Fl 6
Stamford, CT 06902

205 Perry Pkwy
Gaithersburg, MD 20877
Phone (888) 729-1206

205 Perry Pkwy
#207
Gaithersburg, MD 20877

207 Perry Pkwy
Gaithersburg, MD 20877
Phone (301) 519-2100

Practitioners & affiliated clinicians

Practitioners 10

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": "1136332800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1769472000000",
    "number": "1487632998",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 21997",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100870001",
            "telephone_number": "888-729-1206",
            "fax_number": "201-421-2010"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "205 & 207 PERRY PKWY",
            "city": "GAITHERSBURG",
            "state": "MD",
            "postal_code": "208772142",
            "telephone_number": "301-519-2100",
            "fax_number": "201-421-2010"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "GENEDX LLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-01-04",
        "last_updated": "2026-01-27",
        "certification_date": "2026-01-27",
        "status": "A",
        "authorized_official_last_name": "MCGROGAN",
        "authorized_official_first_name": "CHRISTINE",
        "authorized_official_middle_name": "ANN",
        "authorized_official_title_or_position": "PAYOR CREDENTIALING SPECIALIST",
        "authorized_official_telephone_number": "240-658-0686"
    },
    "taxonomies": [
        {
            "code": "170100000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Medical Genetics, Ph.D. Medical Genetics",
            "state": null,
            "license": "870020",
            "primary": false
        },
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": "MD",
            "license": "953",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CMS CLIA CERTIFICATION",
            "identifier": "21D0969951",
            "state": null
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MARYLAND STATE LICENSE",
            "identifier": "953",
            "state": "MD"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "GeneDx, Inc.",
            "code": "4",
            "type": "Former Legal Business Name"
        }
    ]
}

Other providers in Gaithersburg, MD

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 27, 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.