NPIMap

Organization Active NPI

Columbia St. Mary's Hospital Milwaukee Inc

Doing business as Ascension Columbia St Mary's Hospital Milwaukee

  • Multi-Specialty Clinic/Center
  • Milwaukee, WI
National Provider Identifier
1225071491
Registry record updated Jul 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Multi-Specialty Clinic/CenterTaxonomy code 261QM1300X
Legal business name
COLUMBIA ST. MARY'S HOSPITAL MILWAUKEE INC
Doing business as
Ascension Columbia St Mary's Hospital Milwaukee
Practice address
2323 N Lake Dr
Milwaukee, WI 53211-4508
Phone
(414) 585-1000
NPI assigned
Jun 14, 2006
Last updated
Jul 9, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jul 9, 2026

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

Authorized official

Name
Susan Dwyer
Title
Cfo
Phone
(414) 465-3093

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Multi-Specialty Clinic/Center 261QM1300X NU Primary

Addresses

Primary practice location

2323 N Lake Dr
Milwaukee, WI 53211-4508

Mailing address

PO Box 773380
Chicago, IL 60677-3380
Phone (414) 585-1000

Other identifiers 2

IdentifierTypeStateIssuer
21280300MedicaidWI
21258000MedicaidWI

Other names 1

  • Ascension Columbia St Mary's Hospital Milwaukee Doing business as

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20031105000057 WI Part B Supplier - Clinic/Group Practice 5890604722 Receives reassigned benefits from 914 practitioners
4 other NPIs on this enrollment
This NPI is an additional NPI on the enrollment

Other NPIs on the same Medicare enrollment 4

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

National Provider Directory

National Provider Directory

Practitioners & affiliated clinicians

Practitioners 105

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.

View all 105

NPI Registry JSON

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

{
    "created_epoch": "1150243200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1783555200000",
    "number": "1225071491",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 773380",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606773380",
            "telephone_number": "414-585-1000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2323 N LAKE DR",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532114508",
            "telephone_number": "414-585-1000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "COLUMBIA ST. MARY'S HOSPITAL MILWAUKEE INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-06-14",
        "last_updated": "2026-07-09",
        "certification_date": "2026-07-09",
        "status": "A",
        "authorized_official_last_name": "DWYER",
        "authorized_official_first_name": "SUSAN",
        "authorized_official_title_or_position": "CFO",
        "authorized_official_telephone_number": "414-465-3093"
    },
    "taxonomies": [
        {
            "code": "261QM1300X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Multi-Specialty",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "21280300",
            "state": "WI"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "21258000",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Ascension Columbia St Mary's Hospital Milwaukee",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Milwaukee, WI

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 9, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.