Individual provider Active NPI

Catherine Breck Holznecht, M.D.

  • Diagnostic Radiology Physician
  • Madison, WI
National Provider Identifier
1689960023
Registry record updated Oct 6, 2016
On this page

Key facts

NPPES NPI Registry
Primary specialty
Diagnostic Radiology PhysicianTaxonomy code 2085R0202X
License
60296 Issued in WI
Practice address
Uw Hospital and Clinics
600 Highland Ave, H4/831
Madison, WI 53792-0001
Phone
(608) 263-8340
Fax
(608) 263-0682
NPI assigned
Jun 23, 2011
Last updated
Oct 6, 2016By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Oct 6, 2016

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X NU
Diagnostic Radiology Physician 2085R0202X 60296 WI Primary

Addresses

Primary practice location

Uw Hospital and Clinics
600 Highland Ave, H4/831
Madison, WI 53792-0001

Mailing address

7974 Uw Health CT
Middleton, WI 53562-5531

Other names 1

  • Catherine Breck Grogan Former name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI, IA, IL3 enrollments
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 3

Enrollment IDStateProvider typePAC IDDetails
I20160526001387 WI Practitioner - Diagnostic Radiology 3779888789 Reassigns benefits to 1 organization
I20170531000738 IA Practitioner - Diagnostic Radiology 3779888789 Reassigns benefits to 3 organizations
I20170727003754 IL Practitioner - Diagnostic Radiology 3779888789 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Diagnostic Radiology
Education
University of Wisconsin School of Medicine, 2011
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Mercy Radiologists of Dubuque PCGroup PAC ID 9436049152, 8 clinicians

Practice addresses (Care Compare)

250 Mercy Dr
Dubuque, IA 52001-7320
Phone (319) 589-8000

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
60296WIMDDiagnostic Radiology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Mercy Radiologists of Dubuque, P.C. Diagnostic Radiology CurrentSince Jul 1, 2017 Accepting new patients
Midwest Medical Center CurrentSince Jun 29, 2017 Accepting new patients
Upland Hills Health, Inc CurrentSince Oct 1, 2025 Accepting new patients
Radiology One Medical Group PC Diagnostic Radiology CurrentSince Oct 14, 2025 Accepting new patients
Upland Hills Health Inc CurrentSince Oct 1, 2025 Accepting new patients
Midwest Medical Center CurrentSince Jun 29, 2017 Accepting new patients

Locations

250 Mercy Dr
Dubuque, IA 52001
Phone (563) 589-8000

1 Medical Center Dr
Galena, IL 61036
Phone (815) 776-7381

800 Compassion Way
Dodgeville, WI 53533
Phone (608) 930-7200

Interoperability endpoints

  • Direct secure messaging: cholznecht3932850@direct.trinity-health.org
  • Direct secure messaging: cholznecht560059@direct-ehr-ssmhc.com

Organizations & group practices 7

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.

NPI Registry JSON

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

{
    "created_epoch": "1308787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1475712000000",
    "number": "1689960023",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "7974 UW HEALTH CT",
            "city": "MIDDLETON",
            "state": "WI",
            "postal_code": "535625531"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "UW HOSPITAL AND CLINICS",
            "address_2": "600 HIGHLAND AVE, H4/831",
            "city": "MADISON",
            "state": "WI",
            "postal_code": "537920001",
            "telephone_number": "608-263-8340",
            "fax_number": "608-263-0682"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOLZNECHT",
        "first_name": "CATHERINE",
        "middle_name": "BRECK",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2011-06-23",
        "last_updated": "2016-10-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "WI",
            "license": "60296",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "CATHERINE",
            "last_name": "GROGAN",
            "middle_name": "BRECK",
            "credential": "M.D.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Madison, WI

Sources for this page

Verify at the official NPI Registry.