Active NPI
Bradley Joseph Maerz, MD
- Emergency Medicine Physician
- Milwaukee, WI
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Emergency Medicine Physician
- License
- 81885-20
- Practice address
- 2900 W Oklahoma Ave
Milwaukee, WI 53215-4330 - Phone
- (414) 649-7299
- NPI assigned
- Apr 14, 2021
- 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 | 81885-20 | WI | Primary |
Addresses
Primary practice location
2900 W Oklahoma Ave
Milwaukee, WI 53215-4330
Mailing address
PO Box 735044
Chicago, IL 60673-5044
Phone (800) 326-2250
Other practice location 1
8701 W Watertown Plank Rd
Milwaukee, WI 53226-3548
Phone (414) 955-6450
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 100223114 | Medicaid | WI |
Electronic endpoints 2
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| Direct Messaging Address | bjoseph219371@direct.myadvocateaurora.org | Direct | |
| FHIR URL | https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/ |
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
- Emergency Medicine
- Education
- University of Wisconsin School of Medicine, 2021
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
200 E Ryan Rd
Oak Creek, WI 53154-4563
Phone (414) 570-3590
2900 W Oklahoma Ave
Milwaukee, WI 53215-4330
Phone (414) 649-6588
3003 University Dr
Marinette, WI 54143-4110
Phone (715) 735-6621
3003 W Good Hope Rd
Milwaukee, WI 53209-2042
Phone (414) 352-3100
Hospital & facility affiliations
- Aurora St Lukes Medical Center
- West Allis Memorial Hospital
- Aurora Medical Center Bay Area
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Aurora Medical Group, Inc. | Current | Accepting new patients | |
| Aurora Medical Group, Inc. | Current | Accepting new patients | |
| Milwaukee Radiologists LTD | Current | Accepting new patients | |
| Aurora Advanced Healthcare Inc | Current | Accepting new patients | |
| Ermed, SC | Emergency Medicine | Current | Accepting new patients |
| Lakeshore Medical Clinic, LLC | Current | Accepting new patients | |
| Aurora Advanced Healthcare, Inc. | Current | Accepting new patients |
Locations
5900 S Lake Dr
Cudahy, WI 53110
Phone (414) 489-4055
3003 W Good Hope Rd
Glendale, WI 53209
Phone (414) 352-3100
3003 University Dr
Marinette, WI 54143
Phone (715) 735-4200
12203 N Corporate Pkwy
Mequon, WI 53092
Phone (262) 387-8200
2900 W Oklahoma Ave
Milwaukee, WI 53215
Phone (414) 385-2590
1020 N 12th St
Milwaukee, WI 53233
Phone (414) 219-3056
S74W16775 Janesville Rd
Muskego, WI 53150
Phone (414) 422-4747
200 E Ryan Rd
Oak Creek, WI 53154
Phone (414) 570-3590
2000 E Layton Ave
St Francis, WI 53235
Phone (414) 744-7880
Interoperability endpoints
- bjoseph219371@direct.myadvocateaurora.org
Organizations & group practices 7
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.
-
- Family Medicine Physician
- Milwaukee, WI
- NPI 1265629133
-
- Certified Registered Nurse Anesthetist
- Milwaukee, WI
- NPI 1427271378
-
- Emergency Medicine Physician
- Milwaukee, WI
- NPI 1023076296
-
- Family Medicine Physician
- Saint Francis, WI
- NPI 1003861188
-
- Durable Medical Equipment & Medical Supplies
- Summit, WI
- NPI 1477186633
-
- Durable Medical Equipment & Medical Supplies
- Oshkosh, WI
- NPI 1326858044
-
- Diagnostic Radiology Physician
- Greenfield, WI
- NPI 1568564904
Hospital & facility affiliations 7
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Mental Health Clinic/Center (Including Community Mental Health Center)
- Cudahy, WI
- NPI 1235355983
Hospital
-
- General Acute Care Hospital
- Milwaukee, WI
- NPI 1861447179
-
- General Acute Care Hospital
- Marinette, WI
- NPI 1043397177
-
- Clinical Medical Laboratory
- Marinette, WI
- NPI 1083791115
Hospital
-
- General Acute Care Hospital
- West Allis, WI
- NPI 1407801640
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1618358400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1762214400000",
"number": "1780264580",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 735044",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606735044",
"telephone_number": "800-326-2250"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "2900 W OKLAHOMA AVE",
"city": "MILWAUKEE",
"state": "WI",
"postal_code": "532154330",
"telephone_number": "414-649-7299"
}
],
"practiceLocations": [
{
"address_1": "8701 W Watertown Plank Rd",
"address_purpose": "LOCATION",
"city": "Milwaukee",
"state": "WI",
"postal_code": "532263548",
"country_code": "US",
"telephone_number": "414-955-6450",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "MAERZ",
"first_name": "BRADLEY",
"middle_name": "JOSEPH",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2021-04-14",
"last_updated": "2025-11-04",
"certification_date": "2025-11-04",
"status": "A"
},
"taxonomies": [
{
"code": "207P00000X",
"taxonomy_group": "",
"desc": "Emergency Medicine",
"state": "WI",
"license": "81885-20",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "100223114",
"state": "WI"
}
],
"endpoints": [
{
"endpointType": "DIRECT",
"endpointTypeDescription": "Direct Messaging Address",
"endpoint": "bjoseph219371@direct.myadvocateaurora.org",
"affiliation": "N",
"use": "DIRECT",
"useDescription": "Direct",
"address_1": "2900 W Oklahoma Ave",
"city": "Milwaukee",
"state": "WI",
"country_code": "US",
"postal_code": "532154330",
"country_name": "United States",
"address_type": "DOM"
},
{
"endpointType": "FHIR",
"endpointTypeDescription": "FHIR URL",
"endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
"affiliation": "N",
"address_1": "2900 W Oklahoma Ave",
"city": "Milwaukee",
"state": "WI",
"country_code": "US",
"postal_code": "532154330",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": []
}
Other providers in Milwaukee, WI
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 4, 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.