Active NPI
Karl Alexander Damroth, M.D.
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
- Green Bay, WI
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
- License
- 86217-20
- 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
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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
Enrollment records 1
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
Practice addresses (Care Compare)
744 S Webster Ave
Green Bay, WI 54301-3505
Phone (920) 433-6025
Hospital & facility affiliations
- Bellin Memorial Hospital
- Osf St Francis Hospital and Medical Group
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Coronary artery bypass graft (CABG) | 1-10 |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 1-10 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 71809 | MN | MD | Surgery Physician |
| 86217-20 | WI | MD | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Bellin Memorial Hospital Inc | Current | Accepting new patients | |
| Bellin Memorial Hospital Inc | Current | Accepting new patients | |
| Bellin Memorial Hospital Inc | Current | Accepting new patients | |
| Green Bay Cardiothoracic & Vascular LLC | Past | Accepting new patients | |
| Bellin Memorial Hospital Inc | Past | 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
- kdamroth1127957@direct.emplifyhealth.org
- 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.
-
- Rural Health Clinic/Center
- Algoma, WI
- NPI 1609838473
-
- Family Medicine Physician
- Green Bay, WI
- NPI 1033172390
-
- Orthopaedic Surgery Physician
- Green Bay, WI
- NPI 1114398849
-
- Family Medicine Physician
- Brillion, WI
- NPI 1962464784
-
- Cardiovascular Disease Physician
- Green Bay, WI
- NPI 1659412401
Hospital & facility affiliations 2
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Green Bay, WI
- NPI 1891740585
-
- Critical Access Hospital
- Escanaba, MI
- NPI 1922058551
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
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 27, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.