Individual provider Active NPI

Karl Alexander Damroth, M.D.

  • Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
  • Green Bay, WI
National Provider Identifier
1881125482
Registry record updated Aug 27, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianTaxonomy code 208G00000X
License
86217-20 Issued in WI
Practice address
720 S Van Buren St Ste 303
Green Bay, WI 54301-3534
Phone
(920) 433-9621
NPI assigned
Mar 24, 2017
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 27, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Surgery Physician 208600000X 71809 MN
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X 86217-20 WI Primary

Addresses

Primary practice location

720 S Van Buren St Ste 303
Green Bay, WI 54301-3534

Mailing address

200 1St St SW
Rochester, MN 55905-0001
Phone (507) 284-2511

Other practice location 1

1 Atwell Rd
Cooperstown, NY 13326-1301
Phone (607) 547-3456

Other practice location 2

200 1st St SW
Rochester, MN 55905-1301
Phone (507) 284-2511

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI
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 1

Enrollment IDStateProvider typePAC IDDetails
I20251024000906 WI Practitioner - Thoracic Surgery 9436481264 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Thoracic Surgery
Education
Michigan State University College of Human Medicine, 2017
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Bellin Memorial Hospital IncGroup PAC ID 8820900749, 685 clinicians

Practice addresses (Care Compare)

744 S Webster Ave
Green Bay, WI 54301-3505
Phone (920) 433-6025

Hospital & facility affiliations

  • Bellin Memorial Hospital Hospital, Green Bay, WI, CCN 520049
  • Osf St Francis Hospital and Medical Group Hospital, Escanaba, MI, CCN 231337

Procedures performed for Medicare patients

ProcedureNumber of procedures
Coronary artery bypass graft (CABG)1-10
Upper gastrointestinal (GI) endoscopy for acid reflux1-10

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
71809MNMDSurgery Physician
86217-20WIMDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Bellin Memorial Hospital Inc CurrentSince Sep 27, 2025 Accepting new patients
Bellin Memorial Hospital Inc CurrentSince Sep 27, 2025 Accepting new patients
Bellin Memorial Hospital Inc Current Accepting new patients
Green Bay Cardiothoracic & Vascular LLC PastSince Sep 3, 2025 Accepting new patients
Bellin Memorial Hospital Inc PastSince Sep 3, 2025 Accepting new patients

Locations

744 S Webster Ave
Green Bay, WI 54301
Phone (920) 433-6025

720 S Van Buren St
Ste 201
Green Bay, WI 54301
Phone 9204307100200

Interoperability endpoints

  • Direct secure messaging: kdamroth1127957@direct.emplifyhealth.org
  • Direct secure messaging: kdamroth316080@bassett.direct-ci.net

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 and National Provider Directory roles.

Hospital & facility affiliations 2

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": "1490313600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756252800000",
    "number": "1881125482",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 1ST ST SW",
            "city": "ROCHESTER",
            "state": "MN",
            "postal_code": "559050001",
            "telephone_number": "507-284-2511"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "720 S VAN BUREN ST STE 303",
            "city": "GREEN BAY",
            "state": "WI",
            "postal_code": "543013534",
            "telephone_number": "920-433-9621"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1 Atwell Rd",
            "address_purpose": "LOCATION",
            "city": "Cooperstown",
            "state": "NY",
            "postal_code": "133261301",
            "country_code": "US",
            "telephone_number": "607-547-3456",
            "fax_number": "607-547-6612",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "200 1st St SW",
            "address_purpose": "LOCATION",
            "city": "Rochester",
            "state": "MN",
            "postal_code": "559051301",
            "country_code": "US",
            "telephone_number": "507-284-2511",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DAMROTH",
        "first_name": "KARL",
        "middle_name": "ALEXANDER",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-03-24",
        "last_updated": "2025-08-27",
        "certification_date": "2025-08-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "MN",
            "license": "71809",
            "primary": false
        },
        {
            "code": "208G00000X",
            "taxonomy_group": "",
            "desc": "Thoracic Surgery (Cardiothoracic Vascular Surgery)",
            "state": "WI",
            "license": "86217-20",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Green Bay, WI

Sources for this page

Verify at the official NPI Registry.