Marion Arthur Fossum, MD

Primary specialty

Neurology PhysicianTaxonomy code 2084N0400X

License

2024012104 Issued in MO

Practice address

1717 S Ritchey Rd
Medical Lake, WA 99022-8792

Phone

(509) 590-8766

NPI assigned

Apr 12, 2017

Sex

Male

Sole proprietor

No

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

Specialties & licenses 14

Addresses

Medicare fee-for-service enrollment

Enrolled in MO, IN, NC, FL, WA, ME, OR7 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 7

Specialty

Neuropsychiatry

Education

Other, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Hendricks County HospitalGroup PAC ID 4880505528, 341 clinicians

Freeman-Oak Hill Health SystemGroup PAC ID 8325942253, shared by 14 NPIs, 385 clinicians

Franciscan Physician NetworkGroup PAC ID 3072790682, 1,152 clinicians

Novant Health Medical Group, LLCGroup PAC ID 1153234893, 2,413 clinicians

Multicare Health SystemGroup PAC ID 7719899897, 2,312 clinicians

Hannibal Regional Healthcare System IncGroup PAC ID 1254236300, 256 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Freeman Health System - Freeman West Hospital, Joplin, MO, CCN 260137
• Hannibal Regional Hospital Hospital, Hannibal, MO, CCN 260025
• Franciscan Health Lafayette Hospital, Lafayette, IN, CCN 150109
• Freeman Neosho Hospital Hospital, Neosho, MO, CCN 261331
• Novant Health Rowan Medical Center Hospital, Salisbury, NC, CCN 340015

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations (25 of 27)

Interoperability endpoints

• FHIR API: https://fhir-myrecord.cerner.com/r4/4517c430-03bf-4e32-b324-1387cc4e73f3/
• FHIR API: https://fhir.fhirpoint.open.allscripts.com/fhirroute/open/10040602
• FHIR API: https://sehproxy.stelizabeth.com/arr-fhir/api/FHIR/R4
• Direct secure messaging: marion.fossum@hca4.eclinicaldirectplus.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.

• Multicare Health System

  dba Multicare Neurological Surgery

  • Neurological Surgery Physician
  • Tacoma, WA
  • NPI 1497766638
  Medicare reassignment Care Compare group NPD
• Franciscan Physician Network

  • Family Medicine Physician
  • Indianapolis, IN
  • NPI 1225327984
  Medicare reassignment Care Compare group NPD
• Hannibal Regional Healthcare System Inc

  • Multi-Specialty Clinic/Center
  • Hannibal, MO
  • NPI 1003956095
  Medicare reassignment Care Compare group NPD
• Hendricks County Hospital

  dba HRH Associate Health

  • General Practice Physician
  • Danville, IN
  • NPI 1497536163
  Medicare reassignment Care Compare group NPD
• Novant Health Medical Group, LLC

  dba Novant Health Pediatric Neurology & Sleep

  • Neurology with Special Qualifications in Child Neurology Physician
  • Charlotte, NC
  • NPI 1366409492

  Clinical Neurophysiology

  Medicare reassignment Care Compare group NPD
• Legacy Salmon Creek Hospital

  dba Legacy Salmon Creek Providers

  • Clinic/Center
  • Vancouver, WA
  • NPI 1356357784
  Medicare reassignment NPD
• Bridgton Hospital

  • Critical Access Hospital
  • Bridgton, ME
  • NPI 1154370153
  Medicare reassignment NPD
• Centra Medical Group, LLC

  • Family Medicine Physician
  • Lynchburg, VA
  • NPI 1649228966

  WA

  Medicare reassignment NPD
• Central Maine Medical Center

  • General Acute Care Hospital
  • Lewiston, ME
  • NPI 1689653487
  Medicare reassignment NPD
• Freeman-Oak Hill Health System

  dba Freeman Physician Group

  • Multi-Specialty Clinic/Center
  • Joplin, MO
  • NPI 1679517023

  Neurology

  Medicare reassignment NPD
• Freeman-Oak Hill Health System

  dba Freeman Health System

  • General Acute Care Hospital
  • Joplin, MO
  • NPI 1891809679
  Medicare reassignment NPD
• Halifax Healthcare Systems Inc

  dba HHCSI Halifax Family Health Center

  • Family Medicine Physician
  • Daytona Beach, FL
  • NPI 1245283530
  Medicare reassignment NPD

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

• Franciscan Health Lafayette

  dba Franciscan St. Elizabeth Health

  • General Acute Care Hospital
  • Lafayette, IN
  • NPI 1356435341
  Care Compare affiliation
• Freeman Neosho Hospital

  • Critical Access Hospital
  • Neosho, MO
  • NPI 1598873796
  Care Compare affiliation
• Freeman-Oak Hill Health System

  dba Freeman Health System

  • End-Stage Renal Disease (ESRD) Treatment Clinic/Center
  • Webb City, MO
  • NPI 1114394228

  Hospital

  Care Compare affiliation
• Freeman-Oak Hill Health System

  dba Freeman Health System

  • General Acute Care Hospital
  • Joplin, MO
  • NPI 1265546048
  Care Compare affiliation
• Hannibal Regional Healthcare System, Inc

  • Rural Acute Care Hospital
  • Hannibal, MO
  • NPI 1922042704
  Care Compare affiliation
• Novant Health Rowan Medical Center LLC

  dba Novant Health Rowan Medical Center

  • General Acute Care Hospital
  • Salisbury, NC
  • NPI 1508843566
  Care Compare affiliation

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

{
    "created_epoch": "1491955200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1760572800000",
    "number": "1356875736",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1717 S RITCHEY RD",
            "city": "MEDICAL LAKE",
            "state": "WA",
            "postal_code": "990228792",
            "telephone_number": "509-590-8766"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1717 S RITCHEY RD",
            "city": "MEDICAL LAKE",
            "state": "WA",
            "postal_code": "990228792",
            "telephone_number": "509-590-8766"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "19300 SW 65th Ave",
            "address_purpose": "LOCATION",
            "city": "Tualatin",
            "state": "OR",
            "postal_code": "970627706",
            "country_code": "US",
            "telephone_number": "503-692-1212",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1102 W 32nd St",
            "address_purpose": "LOCATION",
            "city": "Joplin",
            "state": "MO",
            "postal_code": "648043503",
            "country_code": "US",
            "telephone_number": "417-347-4570",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "90 Presidential Plz # 4",
            "address_purpose": "LOCATION",
            "city": "Syracuse",
            "state": "NY",
            "postal_code": "132022240",
            "country_code": "US",
            "telephone_number": "315-464-4243",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "6000 Hospital Dr",
            "address_purpose": "LOCATION",
            "city": "Hannibal",
            "state": "MO",
            "postal_code": "634016887",
            "country_code": "US",
            "telephone_number": "573-629-3342",
            "fax_number": "573-629-3432",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1701 S Creasy Ln",
            "address_purpose": "LOCATION",
            "city": "Lafayette",
            "state": "IN",
            "postal_code": "479054972",
            "country_code": "US",
            "telephone_number": "765-502-4400",
            "fax_number": "765-502-4401",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2041 Georgia Ave NW # 5B05",
            "address_purpose": "LOCATION",
            "city": "Washington",
            "state": "DC",
            "postal_code": "20060",
            "country_code": "US",
            "telephone_number": "202-865-6611",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "200 Hawthorne Ln",
            "address_purpose": "LOCATION",
            "city": "Charlotte",
            "state": "NC",
            "postal_code": "282042515",
            "country_code": "US",
            "telephone_number": "704-384-9437",
            "fax_number": "704-384-9440",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "FOSSUM",
        "first_name": "MARION",
        "middle_name": "ARTHUR",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-04-12",
        "last_updated": "2025-10-16",
        "certification_date": "2025-10-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "MS",
            "license": "33801",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "WI",
            "license": "83574-20",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "MO",
            "license": "2024012104",
            "primary": true
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "WA",
            "license": "61254901",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "NC",
            "license": "2024-00610",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "NV",
            "license": "26243",
            "primary": false
        },
        {
            "code": "2084N0600X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Clinical Neurophysiology",
            "state": "WA",
            "license": "61254901",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "FL",
            "license": "ME167370",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "VA",
            "license": "0101281448",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "NJ",
            "license": "25MA12260400",
            "primary": false
        },
        {
            "code": "2084E0001X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Epilepsy",
            "state": "WA",
            "license": "61254901",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "IL",
            "license": "036.169354",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "OR",
            "license": "MD220784",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "IN",
            "license": "01092935A",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Educational Support Services (Medical Lake School District)
• David W. Elkins Jr., PHD
• Aubry Elizabeth Espinosa, RCIS
• Essential Psychiatry, PLLC
• Robert Cory Fanto, PHD
• W Timm Fredrickson, PHD
• Vance Frenzel, PHARMD
• Angela M Gerry, LMT
• Christina Geschke - Lagrou, RDN, CD
• Summer Gibby, SLP

• Neurology Physician in Medical Lake, WA
• Providers in Medical Lake, WA by specialty
• Neurology Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 16, 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.