Horizon Altus PLLC

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

Legal business name

HORIZON ALTUS PLLC

Practice address

1535 West Loop S Ste 300
Houston, TX 77027-0003

Phone

(800) 417-0470

Fax

(832) 219-3228

NPI assigned

Feb 4, 2026

Organization subpart

No

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

Authorized official

Name

Darleen Callahan

Title

Vice President, Revenue Cycle

Phone

(800) 417-0740

Specialties & licenses 1

Addresses

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

{
    "created_epoch": "1770163200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1776384000000",
    "number": "1124979471",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1535 WEST LOOP S STE 300",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770270003",
            "telephone_number": "800-417-0470",
            "fax_number": "832-219-3228"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1535 WEST LOOP S STE 300",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770270003",
            "telephone_number": "800-417-0470",
            "fax_number": "832-219-3228"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "HORIZON ALTUS PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-02-04",
        "last_updated": "2026-04-17",
        "certification_date": "2026-04-17",
        "status": "A",
        "authorized_official_last_name": "CALLAHAN",
        "authorized_official_first_name": "DARLEEN",
        "authorized_official_title_or_position": "VICE PRESIDENT, REVENUE CYCLE",
        "authorized_official_telephone_number": "800-417-0740"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Emergency Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kristin Hemard Horansky, M.D.
• Benjamin Horberg, LCSW
• Sebastian Horcasitas
• Mark Hordes
• Joshua Horeczko
• Horizon Cardiovascular Diagnostic Imaging Center
• Horizon Cardiovascular Diagnostic Imaging, LLC
• Horizon Cardiovascular Imaging Center, LLC
• Horizon Care Home Health Services Inc.
• Horizon Chiropractic LLC

• Emergency Medicine Physician in Houston, TX
• Providers in Houston, TX by specialty
• Emergency Medicine Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 17, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.