Alexandra Diersen, FNP-C

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

17382-33 Issued in WI

Practice address

2400 W Villard Ave
Milwaukee, WI 53209-4901

Phone

(414) 527-8191

NPI assigned

Aug 27, 2025

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

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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2024

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Ascension Medical Group-Southeast Wisconsin IncGroup PAC ID 8628980943, 551 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Ascension All Saints Hospital Hospital, Racine, WI, CCN 520096

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

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.

• Ascension Medical Group-Southeast Wisconsin Inc

  • Internal Medicine Physician
  • Glendale, WI
  • NPI 1609881077
  Medicare reassignment Care Compare group NPD
• Ascension All Saints Hospital, Inc

  • Rehabilitation Hospital Unit
  • Racine, WI
  • NPI 1417966540
  NPD (past)

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

• Ascension All Saints Hospital, Inc

  • General Acute Care Hospital
  • Racine, WI
  • NPI 1639123284
  Care Compare affiliation

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

{
    "created_epoch": "1756252800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1762992000000",
    "number": "1417836396",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2400 W VILLARD AVE",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532094901",
            "telephone_number": "414-527-8191"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2400 W VILLARD AVE",
            "city": "MILWAUKEE",
            "state": "WI",
            "postal_code": "532094901",
            "telephone_number": "414-527-8191"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIERSEN",
        "first_name": "ALEXANDRA",
        "credential": "FNP-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-08-27",
        "last_updated": "2025-11-13",
        "certification_date": "2025-11-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "IA",
            "license": "164167",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "WI",
            "license": "17382-33",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Becky Dienberg, NP
• Maria L Diener, PA-C
• Stephanie A Diener, OT
• Jenna Dieringer
• Lucas W Dieringer, MPT
• Amy L Diestelhorst, M.D.
• Ashley Marie Dietrich, MD
• Lisa Dietrich
• Margaret Elizabeth Jonas Dietrich, MPT
• Peter N Dietrich, M.D.

• Family Nurse Practitioner in Milwaukee, WI
• Providers in Milwaukee, WI by specialty
• Family Nurse Practitioner in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 13, 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.

Verify at the official NPI Registry.