Rette Marie Riley Olsen, DNP, APRN, FNP-C

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

241721 Issued in MT

Practice address

1401 25TH St S
Great Falls, MT 59405-5183

Phone

(406) 731-8888

Fax

(406) 731-8318

NPI assigned

Jan 30, 2023

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 MT

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

Benefis Hospitals IncGroup PAC ID 1153235296, 390 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Benefis Community Care Inc Home health agency, Great Falls, MT, CCN 277090
• Benefis Hospitals Inc Hospital, Great Falls, MT, CCN 270012

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: rolsen53741@benefishs.direct-ci.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.

• Benefis Hospitals Inc

  dba Benefis Medical Group

  • Multi-Specialty Clinic/Center
  • Great Falls, MT
  • NPI 1780968974
  Medicare reassignment Care Compare group NPD

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

• Benefis Community Care, Inc.

  dba Spectrum Home Health

  • Home Health Agency
  • Great Falls, MT
  • NPI 1811927452
  Care Compare affiliation
• Benefis Hospitals Inc

  dba Benefis Medical Group

  • Multi-Specialty Clinic/Center
  • Great Falls, MT
  • NPI 1780968974

  Hospital

  Care Compare affiliation
• Benefis Hospitals, Inc.

  • Air Ambulance
  • Great Falls, MT
  • NPI 1114934023

  Hospital

  Care Compare affiliation
• Benefis Hospitals, Inc.

  • General Acute Care Hospital
  • Great Falls, MT
  • NPI 1881650737
  Care Compare affiliation

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

{
    "created_epoch": "1675036800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767744000000",
    "number": "1013623453",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 6010",
            "city": "GREAT FALLS",
            "state": "MT",
            "postal_code": "594066010"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1401 25TH ST S",
            "city": "GREAT FALLS",
            "state": "MT",
            "postal_code": "594055183",
            "telephone_number": "406-731-8888",
            "fax_number": "406-731-8318"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OLSEN",
        "first_name": "RETTE",
        "middle_name": "MARIE RILEY",
        "credential": "DNP, APRN, FNP-C",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-01-30",
        "last_updated": "2026-01-07",
        "certification_date": "2026-01-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP2300X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Primary Care",
            "state": "MT",
            "license": "NUR-APRN-LIC-241721",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MT",
            "license": "241721",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Courtney Erin O'Connor, LCPC
• Elizabeth A Oconnor, FNP APRN MSN CCRN
• Deborah L Oleynik, ND
• Trent Oliver
• Morgan Laux Olsen, ATC
• Brittany Rae Olson
• Wendy Rae Olson, OTR/L
• Sarah Christine Onstad-Layton, LCPC
• Lyle J Onstad, MD
• Open Door Counseling

• Family Nurse Practitioner in Great Falls, MT
• Providers in Great Falls, MT by specialty
• Family Nurse Practitioner in Montana

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 7, 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.