Exact Sciences Laboratories, LLC

Primary specialty

Clinical Medical LaboratoryTaxonomy code 291U00000X

Legal business name

EXACT SCIENCES LABORATORIES, LLC

Practice address

650 Forward Drive
Madison, WI 53711

Phone

(608) 284-5700

Fax

(608) 535-8715

NPI assigned

Oct 11, 2019

Organization subpart

Yes

Parent organization

EXACT SCIENCES LABORATORIES LLCAs reported in NPPES

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

Authorized official

Name

Stephen Tlachac

Title

Divisional VP and Controller

Phone

(608) 284-5700

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in WI

Enrollment records 1

Other NPIs on the same Medicare enrollment 1

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

• Exact Sciences Laboratories, LLC

  • Clinical Medical Laboratory
  • Madison, WI
  • NPI 1629407069

  O20140325001899

  Same enrollment

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Tax ID family

Exact Sciences Laboratories2 organizations share this tax ID, including this one

Part of

Exact Sciences Laboratories

Other organizations with this tax ID 1

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

• Exact Sciences Laboratories, LLC

  • Clinical Medical Laboratory
  • Madison, WI
  • NPI 1629407069
  NPD tax ID

Locations

Parent organization (reported in NPPES) 1

This organization reports itself as a subpart in NPPES; the parent’s legal name matches this organization in the same state.

• Exact Sciences Laboratories, LLC

  • Clinical Medical Laboratory
  • Madison, WI
  • NPI 1629407069
  NPPES parent name

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Rajarao V Kakuturu, PHD

  • Clinical Laboratory Director (Non-physician)
  • Madison, WI
  • NPI 1417663550
  NPD

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

{
    "created_epoch": "1570752000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1780876800000",
    "number": "1487296307",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 EXACT LN",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537119106",
            "telephone_number": "608-284-5700",
            "fax_number": "608-535-8715"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "650 FORWARD DRIVE",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "53711",
            "telephone_number": "608-284-5700",
            "fax_number": "608-535-8715"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "EXACT SCIENCES LABORATORIES, LLC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "EXACT SCIENCES LABORATORIES LLC",
        "enumeration_date": "2019-10-11",
        "last_updated": "2026-06-08",
        "certification_date": "2026-06-08",
        "status": "A",
        "authorized_official_last_name": "TLACHAC",
        "authorized_official_first_name": "STEPHEN",
        "authorized_official_title_or_position": "DIVISIONAL VP AND CONTROLLER",
        "authorized_official_telephone_number": "608-284-5700"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1629407069",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Mary Ellen Ewanowski, PT
• Steven Michael Ewer, M.D.
• Caroline Burns Ewing
• John R Ewing, MD
• Matthew William Ewy, MD, RD, CNSC
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• Clinical Medical Laboratory in Madison, WI
• Providers in Madison, WI by specialty
• Clinical Medical Laboratory in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 8, 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.