Haystack Oncology Inc

Primary specialty

Clinical Medical LaboratoryTaxonomy code 291U00000X

Legal business name

HAYSTACK ONCOLOGY INC

Practice address

101 W Dickman St Ste 120
Baltimore, MD 21230-5006

Phone

(410) 297-1000

NPI assigned

Jul 25, 2025

Organization subpart

Yes

Parent organization

QUEST DIAGNOSTICS INCORPORATEDAs reported in NPPES

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

Addresses

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

CLIA laboratory certificates

Part of

Questdiagnost Ic Inc

Locations

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

{
    "created_epoch": "1753401600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1753401600000",
    "number": "1396627618",
    "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": "101 W DICKMAN ST STE 120",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212305006",
            "telephone_number": "410-297-1000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "HAYSTACK ONCOLOGY INC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "QUEST DIAGNOSTICS INCORPORATED",
        "enumeration_date": "2025-07-25",
        "last_updated": "2025-07-25",
        "certification_date": "2025-07-25",
        "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": []
}

• Allison Hays, MD
• Megan Hays, CCC-SLP
• Tiffani Hays, MS,RD, LN
• Tyler Joseph Hays, PA
• Hilary Anne Hayssen, MD
• Jennifer Haythornthwaite, PH.D.
• Christin Hayward
• Madison Elise Hayward
• Haywood Medical, LLC
• Joan Schreiber Haywood, R.PH.

• Clinical Medical Laboratory in Baltimore, MD
• Providers in Baltimore, MD by specialty
• Clinical Medical Laboratory in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 25, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• 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.