Active NPI
William Keith Hornung, M.D.
- Critical Care Medicine (Anesthesiology) Physician
- Louisville, KY
National Provider Identifier
1093767618
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Critical Care Medicine (Anesthesiology) Physician
- License
- 25515
- Practice address
- 200 Abraham Flexner Way
Louisville, KY 40202-1818 - Phone
- (502) 587-4404
- Fax
- (502) 584-0144
- NPI assigned
- May 16, 2006
- 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 |
|---|---|---|---|---|
| Anesthesiology Physician | 207L00000X | 25515 | KY | |
| Critical Care Medicine (Anesthesiology) Physician | 207LC0200X | 25515 | KY | Primary |
Addresses
Primary practice location
200 Abraham Flexner Way
Louisville, KY 40202-1818
Mailing address
100 E Liberty St
Suite 303
Louisville, KY 40202-1434
Phone (502) 584-0166
Other identifiers 2
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 000000359009 | Other | KY | ANTHEM |
| 64255151 | Medicaid | KY |
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
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Anesthesia Associates of Louisville, PSC | Anesthesiology | Past | Accepting new patients |
Organizations & group practices 1
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.
-
- Anesthesiology Physician
- Louisville, KY
- NPI 1447200621
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1147737600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1093767618",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "100 E LIBERTY ST",
"address_2": "SUITE 303",
"city": "LOUISVILLE",
"state": "KY",
"postal_code": "402021434",
"telephone_number": "502-584-0166",
"fax_number": "502-584-0144"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "200 ABRAHAM FLEXNER WAY",
"city": "LOUISVILLE",
"state": "KY",
"postal_code": "402021818",
"telephone_number": "502-587-4404",
"fax_number": "502-584-0144"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HORNUNG",
"first_name": "WILLIAM",
"middle_name": "KEITH",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-05-16",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207L00000X",
"taxonomy_group": "",
"desc": "Anesthesiology",
"state": "KY",
"license": "25515",
"primary": false
},
{
"code": "207LC0200X",
"taxonomy_group": "",
"desc": "Anesthesiology, Critical Care Medicine",
"state": "KY",
"license": "25515",
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "ANTHEM",
"identifier": "000000359009",
"state": "KY"
},
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "64255151",
"state": "KY"
}
],
"endpoints": [],
"other_names": []
}Other providers in Louisville, KY
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.