Kathy L. Errthum, CNM

Primary specialty

Advanced Practice MidwifeTaxonomy code 367A00000X

License

3387-33 Issued in WI

Practice address

800 West Ave S
La Crosse, WI 54601-8806

Phone

(608) 782-9760

NPI assigned

Jun 19, 2007

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in WI

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Certified Nurse Midwife (CNM)

Education

Other, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mayo Clinic Health System-Southwest Wisconsin Region IncGroup PAC ID 0345152443, 539 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mayo Clinic Health System-Franciscan Medical Center Inc Hospital, La Crosse, WI, CCN 520004

Medicare enrollment (NPD)

Enrolled

Credentials

Certified Nurse Midwife

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: kerrthum25932@ehrdirect.mayoclinicmsg.org

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.

• Mayo Clinic Health System-Southwest Wisconsin Region, Inc.

  dba Mayo Clinic Health System - La Crosse

  • Multi-Specialty Clinic/Center
  • La Crosse, WI
  • NPI 1629056049
  Medicare reassignment Care Compare group NPD
• Mayo Clinic Health System-Southwest Wisconsin Region, Inc.

  dba Mayo Clinic Health System - La Crosse

  • Multi-Specialty Clinic/Center
  • La Crosse, WI
  • NPI 1942980917
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Mayo Clinic Health System-Southwest Wisconsin Region, Inc.

  dba Franciscan Healthcare - La Crosse

  • General Acute Care Hospital
  • La Crosse, WI
  • NPI 1801874227
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1182211200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788998400000",
    "number": "1326243445",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 860912",
            "address_2": "PROVIDER ENROLLMENT",
            "city": "MINNEAPOLIS",
            "state": "MN",
            "postal_code": "554860912",
            "telephone_number": "608-785-0940"
        },
        {
            "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": [],
    "basic": {
        "last_name": "ERRTHUM",
        "first_name": "KATHY",
        "middle_name": "L.",
        "credential": "CNM",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-06-19",
        "last_updated": "2026-09-10",
        "certification_date": "2026-09-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367A00000X",
            "taxonomy_group": "",
            "desc": "Advanced Practice Midwife",
            "state": "MN",
            "license": "R1782408",
            "primary": false
        },
        {
            "code": "367A00000X",
            "taxonomy_group": "",
            "desc": "Advanced Practice Midwife",
            "state": "WI",
            "license": "3387-33",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "kerrthum25932@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": []
}

• Tori Erickson, RDN
• Jay C Erie, M.D.
• Jennifer Erin, CRNA
• Martin Erlandson, DO
• Nancy L Ernst, RD
• Marc Christopher Ertz, R.PH.
• James S Erwin, MD
• Scott A Escher, MD
• Brendon Michael Esquibel, MD
• Robert S Ettinger, MD

• Advanced Practice Midwife in La Crosse, WI
• Providers in La Crosse, WI by specialty
• Advanced Practice Midwife in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 10, 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.

Verify at the official NPI Registry.