NPIMap

Individual provider Active NPI

Mark T. Catherall, M.D.

  • Hospitalist Physician
  • Milwaukee, WI
National Provider Identifier
1235169251
Registry record updated Aug 7, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hospitalist PhysicianTaxonomy code 208M00000X
License
47836 Issued in WI
Practice address
1004 N 10TH St
Milwaukee, WI 53233-1423
Phone
(414) 727-6320
NPI assigned
Jul 4, 2006
Last updated
Aug 7, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 7, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 47836 WI
Hospitalist Physician 208M00000X 47836 WI Primary

Addresses

Primary practice location

1004 N 10TH St
Milwaukee, WI 53233-1423

Mailing address

220 W Capitol Dr
Glendale, WI 53212-1185
Phone (414) 727-6320

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20050418000154 WI Practitioner - HospitalistPractitioner - Internal Medicine 3870563174 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
HospitalistAlso: Internal Medicine
Education
Loyola University of Chicago, Stritch School of Medicine, 1998
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

2301 N Lake Dr
Milwaukee, WI 53211-4508
Phone (414) 585-1000

3801 Spring St
Mount Pleasant, WI 53405-1667
Phone (262) 687-4011

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
47836WIMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Columbia St. Mary's Hospital Milwaukee, Inc CurrentSince May 12, 2025 Accepting new patients
Columbia St. Mary's Hospital Milwaukee Inc CurrentSince May 12, 2025 Accepting new patients
Ascension Medical Group-Southeast Wisconsin Inc Internal Medicine CurrentSince Apr 2, 2007 Accepting new patients
Outreach Community Health Centers, Inc. PastSince Nov 10, 2024 Accepting new patients
Outreach Community Health Centers, Inc. Past Accepting new patients

Locations

13950 W Capitol Dr
Brookfield, WI 53005
Phone (414) 302-5400

2301 N Lake Dr
Milwaukee, WI 53211
Phone (414) 270-4932

2323 N Lake Dr
Milwaukee, WI 53211
Phone (414) 291-1000

3801 Spring St
Mount Pleasant, WI 53405
Phone (262) 636-4011

1120 Main St
Union Grove, WI 53182
Phone (262) 687-8000

Ownership & related parties

All facility ownership & control disclosures 6

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

FacilityTypeRoleSince
Ascension SE Wisconsin HospitalMilwaukee, WI, CCN 520136 Hospital Corporate Director Jan 1, 2024
Ascension All Saints HospitalRacine, WI, CCN 520096 Hospital Corporate Director Jan 1, 2024
Ascension Sacred Heart Rehabilitation HospitalMequon, WI, CCN 523025 Hospital Corporate Director Jan 1, 2024
Ascension St Francis HospitalMilwaukee, WI, CCN 520078 Hospital Corporate Director Jan 1, 2024
Ascension SE Wisconsin Hospital-Elmbrook CampusBrookfield, WI, CCN 52T136 Hospital Corporate Director Jan 1, 2024
Ascension All Saints HospitalRacine, WI, CCN 52T096 Hospital Corporate Director Jan 1, 2024

Owned or controlled facilities with NPI records 6

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

Organizations & group practices 5

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 3

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1151971200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786060800000",
    "number": "1235169251",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "220 W CAPITOL DR",
            "city": "GLENDALE",
            "state": "WI",
            "postal_code": "532121185",
            "telephone_number": "414-727-6320",
            "fax_number": "414-727-6328"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1004 N 10TH ST",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532331423",
            "telephone_number": "414-727-6320"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CATHERALL",
        "first_name": "MARK",
        "middle_name": "T.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-04",
        "last_updated": "2026-08-07",
        "certification_date": "2026-08-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WI",
            "license": "47836",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "WI",
            "license": "47836",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Milwaukee, WI

Sources for this page

Verify at the official NPI Registry.