Erik Sievertsen, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

86111 Issued in WI

Practice address

1700 Clinton St
Muskegon, MI 49443

Phone

(231) 728-4601

NPI assigned

Aug 4, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in MI, WI2 enrollments

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 2

Specialty

Emergency Medicine

Education

Other, 1991

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

MCHS Hospitals IncGroup PAC ID 5698071173, shared by 28 NPIs, 1,195 clinicians

Vituity-Michigan Health Services PCGroup PAC ID 9931635430, 56 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Flambeau Hospital Hospital, Park Falls, WI, CCN 521325
• Marshfield Medical Center Hospital, Marshfield, WI, CCN 520037
• Beacon Plainwell Long-term care hospital, Plainwell, MI, CCN 232034

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir-myrecord.cerner.com/r4/67ff075a-8289-4f2d-a8eb-5dc1f0d954ab/
• Direct secure messaging: him@marshfieldclinichealthsystem.cernerdirect.com

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.

• Vituity-Michigan Health Services PC

  • Emergency Medicine Physician
  • Kalamazoo, MI
  • NPI 1750102323
  Medicare reassignment Care Compare group NPD
• Ascension Borgess Hospital

  • General Acute Care Hospital
  • Kalamazoo, MI
  • NPI 1568416311
  Medicare reassignment NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Saginaw, MI
  • NPI 1912687328
  Medicare reassignment NPD
• Degara App, PLLC

  • Emergency Medicine Physician
  • Lansing, MI
  • NPI 1265976971
  Medicare reassignment NPD
• Lake Michigan Emergency Specialists, PLLC

  • Emergency Medicine Physician
  • Muskegon, MI
  • NPI 1124574520
  Medicare reassignment NPD
• Sparrow Ionia Hospital

  • Critical Access Hospital
  • Ionia, MI
  • NPI 1700820065
  Medicare reassignment NPD
• Beaver Dam Community Hospitals Inc

  • Clinic/Center
  • Beaver Dam, WI
  • NPI 1972188555
  Medicare reassignment NPD
• Flambeau Hospital Inc

  • Clinic/Center
  • Park Falls, WI
  • NPI 1194317966
  Medicare reassignment NPD
• Flambeau Hospital Inc

  • Critical Access Hospital
  • Park Falls, WI
  • NPI 1700963048
  Medicare reassignment NPD
• Lakeview Medical Center Inc of Rice Lake

  • Clinic/Center
  • Rice Lake, WI
  • NPI 1093201832
  Medicare reassignment NPD
• Marshfield Clinic Inc

  • Clinic/Center
  • Marshfield, WI
  • NPI 1952347981
  Medicare reassignment NPD
• MCHS Hospitals Inc

  • Clinic/Center
  • Marshfield, WI
  • NPI 1093221434

  Emergency Medicine

  Medicare reassignment NPD

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

• Ascension Borgess Hospital

  • Long Term Care Hospital
  • Plainwell, MI
  • NPI 1154504892

  Long-term care hospital

  Care Compare affiliation
• Flambeau Hospital Inc

  • Critical Access Hospital
  • Park Falls, WI
  • NPI 1700963048
  Care Compare affiliation
• MCHS Hospitals Inc

  • Rural Acute Care Hospital
  • Marshfield, WI
  • NPI 1942749387
  Care Compare affiliation

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

{
    "created_epoch": "1154649600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770249600000",
    "number": "1134137136",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 1487",
            "city": "MUSKEGON",
            "state": "MI",
            "postal_code": "494431487",
            "telephone_number": "616-975-1845",
            "fax_number": "616-975-1870"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1700 CLINTON ST",
            "city": "MUSKEGON",
            "state": "MI",
            "postal_code": "49443",
            "telephone_number": "231-728-4601"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4100 State Highway 66",
            "address_purpose": "LOCATION",
            "city": "Stevens Point",
            "state": "WI",
            "postal_code": "544828410",
            "country_code": "US",
            "telephone_number": "715-343-7700",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIEVERTSEN",
        "first_name": "ERIK",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-08-04",
        "last_updated": "2026-02-05",
        "certification_date": "2026-02-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207PE0004X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Emergency Medical Services",
            "state": "MI",
            "license": "4301072224",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "WI",
            "license": "86111",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "930103748",
            "state": "MI"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "him@marshfieldclinichealthsystem.cernerdirect.com",
            "affiliation": "N",
            "address_1": "4100 State Highway 66",
            "city": "Stevens Point",
            "state": "WI",
            "country_code": "US",
            "postal_code": "544828410",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Michael Shuster, AT, ATC
• Kimberly R Sidlauskas, LLMSW
• Gabriel J Sidor
• Callie Sierra
• Brietney Jeanne Sierzant, PA
• Lara Sigmon, MA, LLPC
• Ericka Shannon Sikkenga, D.O.
• Vonda Kay Sillman
• Rachel C Silver, DPT
• Alexandra Simon, PHARMD

• Emergency Medicine Physician in Muskegon, MI
• Providers in Muskegon, MI by specialty
• Emergency Medicine Physician in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 5, 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.