Active NPI
Karl Pennau, MD
- Orthopaedic Surgery Physician
- Fond Du Lac, WI
National Provider Identifier
1487636536
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Orthopaedic Surgery Physician
- License
- 24240
- Practice address
- 421 Camelot Dr
Fond Du Lac, WI 54935-4560 - Phone
- (920) 926-8616
- NPI assigned
- Nov 15, 2005
- Last updated
- Jul 13, 2026
- 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Orthopaedic Surgery Physician | 207X00000X | 24240 | WI | Primary |
Addresses
Primary practice location
421 Camelot Dr
Fond Du Lac, WI 54935-4560
Mailing address
420 E Division St
Fond Du Lac, WI 54935-4560
Phone (920) 926-8340
Other identifiers 4
| Identifier | Type | State | Issuer |
|---|---|---|---|
| P00224646 | Other | WI | RAILROAD MEDICARE |
| WI01S7 | Other | WI | JOHN DEERE |
| 30286500 | Medicaid | WI | |
| 13880 | Other | WI | DEAN |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1132012800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1487636536",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "420 E DIVISION ST",
"city": "FOND DU LAC",
"state": "WI",
"postal_code": "549354560",
"telephone_number": "920-926-8340"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "421 CAMELOT DR",
"city": "FOND DU LAC",
"state": "WI",
"postal_code": "549354560",
"telephone_number": "920-926-8616"
}
],
"practiceLocations": [],
"basic": {
"last_name": "PENNAU",
"first_name": "KARL",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-11-15",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207X00000X",
"taxonomy_group": "",
"desc": "Orthopaedic Surgery",
"state": "WI",
"license": "24240",
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "RAILROAD MEDICARE",
"identifier": "P00224646",
"state": "WI"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "JOHN DEERE",
"identifier": "WI01S7",
"state": "WI"
},
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "30286500",
"state": "WI"
},
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "DEAN",
"identifier": "13880",
"state": "WI"
}
],
"endpoints": [],
"other_names": []
}
Other providers in Fond Du Lac, WI
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.