Active NPI
Laura J Prosperi, CNM
- Advanced Practice Midwife
- La Crosse, WI
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Advanced Practice Midwife
- License
- 137179
- Practice address
- 800 West Ave S
La Crosse, WI 54601-8806 - Phone
- (608) 782-9760
- NPI assigned
- Nov 9, 2005
- Sex
- Female
- 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 |
|---|---|---|---|---|
| Advanced Practice Midwife | 367A00000X | 137179 | WI | Primary |
Addresses
Primary practice location
800 West Ave S
La Crosse, WI 54601-8806
Mailing address
PO Box 860912
Minneapolis, MN 55486-0912
Phone (507) 284-2511
Other practice location 1
1025 Marsh St
Mankato, MN 56001-4752
Phone (507) 625-4031
Other names 1
- Laura J Harkness
Electronic endpoints 1
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| Direct Messaging Address | lharkness26170@ehrdirect.mayoclinicmsg.org |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in WI, MN
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: No
- Power mobility devices: No
- Hospice: No
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Certified Nurse Midwife (CNM)
- Education
- Other, 2024
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
800 E Blackhawk Ave
Prairie Du Chien, WI 53821-1698
Phone (608) 326-0808
800 W Ave S
La Crosse, WI 54601-8806
Phone (608) 785-0940
Hospital & facility affiliations
- Mayo Clinic Health System-Franciscan Medical Center Inc
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Certified Nurse Midwife
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 137179 | WI | MD | Advanced Practice Midwife |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Mayo Clinic Health System-Southwest Wisconsin Region, Inc. | Current | Accepting new patients | |
| Mayo Clinic Health System-Southwest Wisconsin Region, Inc. | Current | Accepting new patients | |
| Mayo Clinic Health System-Southwest Minnesota Region | Current | Accepting new patients | |
| Mayo Clinic Health System-Southwest Minnesota Region | Current | Accepting new patients |
Locations
901 Montgomery St
Decorah, IA 52101
Phone (319) 382-2911
1025 Marsh St
Mankato, MN 56001
Phone (507) 345-2623
200 1st St SW
Rochester, MN 55905
Phone (507) 266-4850
1400 Bellinger St
Eau Claire, WI 54703
Phone (715) 838-3311
800 West Ave S
La Crosse, WI 54601
Phone (608) 372-5951
800 E Blackhawk Ave
Prairie du Chien, WI 53821
Phone (608) 326-0808
310 W Main St
Sparta, WI 54656
Phone (608) 269-1700
325 Butts Ave
Tomah, WI 54660
Phone (608) 372-5951
Interoperability endpoints
- lharkness26170@ehrdirect.mayoclinicmsg.org
Organizations & group practices 4
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.
-
- Multi-Specialty Clinic/Center
- La Crosse, WI
- NPI 1629056049
-
- Multi-Specialty Clinic/Center
- Mankato, MN
- NPI 1578545422
-
- Multi-Specialty Clinic/Center
- La Crosse, WI
- NPI 1942980917
-
- Multi-Specialty Clinic/Center
- Waseca, MN
- NPI 1518494251
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- La Crosse, WI
- NPI 1801874227
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1131494400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783468800000",
"number": "1386625150",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 860912",
"city": "MINNEAPOLIS",
"state": "MN",
"postal_code": "554860912",
"telephone_number": "507-284-2511"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "800 WEST AVE S",
"city": "LA CROSSE",
"state": "WI",
"postal_code": "546018806",
"telephone_number": "608-782-9760"
}
],
"practiceLocations": [
{
"address_1": "1025 Marsh St",
"address_purpose": "LOCATION",
"city": "Mankato",
"state": "MN",
"postal_code": "560014752",
"country_code": "US",
"telephone_number": "507-625-4031",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "PROSPERI",
"first_name": "LAURA",
"middle_name": "J",
"credential": "CNM",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2005-11-09",
"last_updated": "2026-07-08",
"certification_date": "2026-07-08",
"status": "A"
},
"taxonomies": [
{
"code": "367A00000X",
"taxonomy_group": "",
"desc": "Advanced Practice Midwife",
"state": "WI",
"license": "137179",
"primary": true
}
],
"identifiers": [],
"endpoints": [
{
"endpointType": "DIRECT",
"endpointTypeDescription": "Direct Messaging Address",
"endpoint": "lharkness26170@ehrdirect.mayoclinicmsg.org",
"affiliation": "N",
"address_1": "800 West Ave S",
"city": "La Crosse",
"state": "WI",
"country_code": "US",
"postal_code": "546018806",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": [
{
"first_name": "LAURA",
"last_name": "HARKNESS",
"middle_name": "J",
"code": "1",
"type": "Former Name"
}
]
}
Other providers in La Crosse, WI
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 8, 2026; 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.