David Nilsen, D.O.

Primary specialty

Orthopaedic Surgery PhysicianTaxonomy code 207X00000X

License

1735-321 Issued in WI

Practice address

557 N Washington St
Janesville, WI 53548-2907

Phone

(608) 754-6000

NPI assigned

Aug 25, 2008

Last updated

Jun 22, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Orthopedic Surgery

Education

Michigan State University College of Osteopathic Medicine, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mercy Health System CorporationGroup PAC ID 7416860440, 749 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mercy Health System Corp Hospital, Janesville, WI, CCN 520066
• Javon Bea Hospital Hospital, Rockford, IL, CCN 140239

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: dnilsen93676@direct.mhemail.org

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.

• Mercy Health System Corporation

  dba MHS Physician Services

  • Multi-Specialty Clinic/Center
  • Janesville, WI
  • NPI 1598718603
  Medicare reassignment Care Compare group NPD
• Mercy Health System Corporation

  dba Mercy Hospital Janesville

  • General Acute Care Hospital
  • Janesville, WI
  • NPI 1093768962
  NPD
• Mercy Health System Corporation

  dba Mercy Walworth Hospital and Medical Center

  • Critical Access Hospital
  • Lake Geneva, WI
  • NPI 1699728550
  NPD

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

• Mercy Health System Corporation

  dba Mercy Hospital Janesville

  • General Acute Care Hospital
  • Janesville, WI
  • NPI 1093768962
  Care Compare affiliation
• Javon Bea Hospital

  • General Acute Care Hospital
  • Rockford, IL
  • NPI 1629118609
  Care Compare affiliation

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

{
    "created_epoch": "1219622400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782086400000",
    "number": "1588811244",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4945 SUMPTER DR",
            "city": "MILTON",
            "state": "WI",
            "postal_code": "535638482",
            "telephone_number": "480-734-3967"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "557 N WASHINGTON ST",
            "city": "JANESVILLE",
            "state": "WI",
            "postal_code": "535482907",
            "telephone_number": "608-754-6000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "N2950 State Road 67",
            "address_purpose": "LOCATION",
            "city": "Lake Geneva",
            "state": "WI",
            "postal_code": "531472655",
            "country_code": "US",
            "telephone_number": "262-245-0535",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NILSEN",
        "first_name": "DAVID",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-08-25",
        "last_updated": "2026-06-22",
        "certification_date": "2026-06-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "PA",
            "license": "OS013810",
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "AZ",
            "license": "005533",
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "WI",
            "license": "1735-321",
            "primary": true
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "PA",
            "license": "OT011238",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Karl A Nibbelink, MD
• Jeffrey R. Nichols, DO
• Ryan Nichols, DC
• Alfred C Nicolosi, MD
• Brandon James Niebuhr
• Sheila Kay Nitz, LPN
• Todd Allen Noggle, MS, LPC, NCC, LCPC
• Nolte Chiropractic LLC
• Jeffery Dean Nolte, D.C.
• Margo Beth Nolte, D.C.

• Orthopaedic Surgery Physician in Janesville, WI
• Providers in Janesville, WI by specialty
• Orthopaedic Surgery Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 22, 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.