Active NPI
Nicholas William Karlow, MD
- Emergency Medicine Physician
- Saint Louis, MO
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Emergency Medicine Physician
- License
- 2022044117
- Practice address
- 11133 Dunn Rd
Dept Emergency Med
Saint Louis, MO 63136-6163 - Phone
- (314) 362-9123
- Fax
- (314) 747-9160
- NPI assigned
- Jun 27, 2019
- Last updated
- Sep 9, 2025
- 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 |
|---|---|---|---|---|
| Emergency Medicine Physician | 207P00000X | 2022044117 | MO | Primary |
Addresses
Primary practice location
11133 Dunn Rd
Dept Emergency Med
Saint Louis, MO 63136-6163
Mailing address
PO Box 7412011
Chicago, IL 60674-2011
Phone (314) 362-9123
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 200071816 | Medicaid | MO |
Electronic endpoints 1
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| FHIR URL | https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/ | Washington University |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MO
- 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
- Emergency Medicine
- Education
- Other, 2019
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
10 Hospital Dr
Saint Peters, MO 63376-1659
Phone (314) 362-9123
232 S Woods Mill Rd
Chesterfield, MO 63017-3406
Phone (314) 434-1500
Hospital & facility affiliations
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 2022044117 | MO | MD | Emergency Medicine Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Mercy Hospital South | Current | Accepting new patients | |
| Mercy Hospitals East Communities | Current | Accepting new patients | |
| Emergency Physicians of St. Luke's, LLC | Emergency Medicine | Current | Accepting new patients |
| Physician Specialists of St Lukes LLC | Emergency Medicine | Current | Accepting new patients |
| Mercy Hospitals East Communities | Emergency Medicine | Current | Accepting new patients |
| Mercy Hospital Jefferson | Current | Accepting new patients | |
| Mercy Hospitals East Communities | Emergency Medicine | Current | Accepting new patients |
| Southeastern Emergency Physicians of Memphis LLC | Emergency Medicine | Current | Accepting new patients |
| Mercy Hospital Jefferson | Current | Accepting new patients | |
| Mercy Hospital South | Emergency Medicine | Current | Accepting new patients |
| Mercy Hospitals East Communities | Current | Accepting new patients | |
| Washington University Community Specialists, LLC | Current | Accepting new patients |
Locations
1600 E Broadway
Columbia, MO 65201
Phone (573) 632-5000
1400 US Highway 61
Crystal Cty, MO 63028
Phone (636) 933-1111
233 Clarkson Rd
Ellisville, MO 63011
Phone (636) 256-8644
1225 Graham Rd
#U
Florissant, MO 63031
10010 Kennerly Rd
Saint Louis, MO 63128
Phone (314) 525-1328
11133 Dunn Rd
Saint Louis, MO 63136
Phone (314) 653-5000
11133 Dunn Rd
#U
Saint Louis, MO 63136
2345 Dougherty Ferry Rd
Saint Louis, MO 63122
Phone (314) 821-5850
615 S New Ballas Rd
Saint Louis, MO 63141
Phone (314) 251-4687
10 Hospital Dr
#U
Saint Peters, MO 63376
232 S Woods Mill Rd
Town and Country, MO 63017
Phone (314) 205-6030
901 E 5th St
Washington, MO 63090
Phone (636) 239-8000
Organizations & group practices 12
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.
-
- Emergency Medicine Physician
- Chesterfield, MO
- NPI 1215359815
-
- Emergency Care Clinic/Center
- Saint Louis, MO
- NPI 1922812254
-
- General Acute Care Hospital
- Festus, MO
- NPI 1508859661
-
dba Mercy Hospital Washington
- General Acute Care Hospital
- Washington, MO
- NPI 1285664177
Emergency Medicine
-
dba Mercy Hospital St Louis
- General Acute Care Hospital
- Saint Louis, MO
- NPI 1427098169
Emergency Medicine
-
- Internal Medicine Physician
- Chesterfield, MO
- NPI 1235168410
Emergency Medicine
-
- Emergency Medicine Physician
- Alton, IL
- NPI 1437105277
MO
-
- Medicare Defined Swing Bed Hospital Unit
- Saint Louis, MO
- NPI 1033714209
-
dba Mercy Hospital Washington McAuley Clinic
- Rural Health Clinic/Center
- Washington, MO
- NPI 1104912997
-
dba Mercy St. Louis Transport Ambulance
- Land Ambulance
- Saint Louis, MO
- NPI 1881329902
Hospital & facility affiliations 3
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Saint Louis, MO
- NPI 1639186760
-
dba Christian Hospital
- Ambulance
- Saint Louis, MO
- NPI 1073769329
Hospital
-
dba St. Luke's Hospital
- General Acute Care Hospital
- Chesterfield, MO
- NPI 1346251543
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1561593600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757376000000",
"number": "1922669167",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 7412011",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606742011",
"telephone_number": "314-362-9123",
"fax_number": "314-747-9160"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "11133 DUNN RD",
"address_2": "DEPT EMERGENCY MED",
"city": "SAINT LOUIS",
"state": "MO",
"postal_code": "631366163",
"telephone_number": "314-362-9123",
"fax_number": "314-747-9160"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KARLOW",
"first_name": "NICHOLAS",
"middle_name": "WILLIAM",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2019-06-27",
"last_updated": "2025-09-09",
"certification_date": "2023-03-09",
"status": "A"
},
"taxonomies": [
{
"code": "207P00000X",
"taxonomy_group": "",
"desc": "Emergency Medicine",
"state": "MO",
"license": "2022044117",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "200071816",
"state": "MO"
}
],
"endpoints": [
{
"endpointType": "FHIR",
"endpointTypeDescription": "FHIR URL",
"endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
"affiliation": "Y",
"affiliationName": "Washington University",
"address_1": "11133 Dunn Rd",
"address_2": "Dept Emergency Med",
"city": "Saint Louis",
"state": "MO",
"country_code": "US",
"postal_code": "631366163",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": []
}
Other providers in Saint Louis, MO
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 9, 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.