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MARION ARTHUR FOSSUM MD
NPI 1356875736
Psychiatry & Neurology - Neurology in Medical Lake, WA

Active since April 12, 2017PECOS EnrolledAccepts Medicare Assignment
1717 S RITCHEY RD, MEDICAL LAKE, WA 99022(509) 590-8766 Get Directions Write a Review

NPPES record last updated: October 16, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 5, 2025, Dec 3, 2024, Jul 12, 2024 and 3 more (6 updates tracked since 2017).

About Marion Arthur Fossum Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARION ARTHUR FOSSUM MD (NPI 1356875736) is an individual neurology provider in Medical Lake, Washington, licensed in Missouri (2024012104) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, is affiliated with Franciscan Health Lafayette, and maintains 7 additional practice locations.

NPPES Registry Identity

NPI1356875736
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameMARION ARTHUR FOSSUMCredential: MD
Location Address1717 S RITCHEY RDMedical Lake, WA 99022-8792
Mailing Address1717 S Ritchey RdMedical Lake, WA 99022-8792 · (509) 590-8766
Phone(509) 590-8766
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateApril 12, 2017
Last NPPES UpdateOctober 16, 20256 updates tracked since enumeration
NPPES CertifiedOctober 16, 2025
✔ NPI 1356875736 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
Licenses✔ Licensed in MO · 2024012104✔ Licensed in MS · 33801✔ Licensed in WI · 83574-20✔ Licensed in WA · 61254901✔ Licensed in NC · 2024-00610✔ Licensed in NV · 26243✔ Licensed in FL · ME167370✔ Licensed in VA · 0101281448✔ Licensed in NJ · 25MA12260400✔ Licensed in IL · 036.169354✔ Licensed in OR · MD220784✔ Licensed in IN · 01092935A
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
Also ListedPsychiatry & Neurology · EpilepsyTaxonomy 2084E0001X · License 61254901 (WA)
Also ListedPsychiatry & Neurology · Clinical NeurophysiologyTaxonomy 2084N0600X · License 61254901 (WA)
1717 S RITCHEY RD, Medical Lake, WA 99022
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Secondary Practice Locations 7

Location 119300 SW 65th AveTualatin, OR 97062-7706 · Phone (503) 692-1212
Location 21102 W 32nd StJoplin, MO 64804-3503 · Phone (417) 347-4570
Location 390 Presidential Plz # 4Syracuse, NY 13202-2240 · Phone (315) 464-4243
Location 46000 Hospital DrHannibal, MO 63401-6887 · Phone (573) 629-3342 · Fax (573) 629-3432
Location 51701 S Creasy LnLafayette, IN 47905-4972 · Phone (765) 502-4400 · Fax (765) 502-4401
Location 62041 Georgia Ave NW # 5B05Washington, DC 20060 · Phone (202) 865-6611
Location 7200 Hawthorne LnCharlotte, NC 28204-2515 · Phone (704) 384-9437 · Fax (704) 384-9440

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of NC, CareSource and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marion Arthur Fossum Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID244772507
PECOS Enrollment IDI20240603001900, I20240708004123, I20240816001560, I20250108002917, I20250317000788
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
68 services38 patients
Measurement of brain wave activity (eeg), awake and asleep 95819
The measurement of brain wave activity, known as an EEG, records the brain's electrical signals. It's performed when you're awake and asleep to monitor your brain's functioning. It helps in diagnosing conditions like epilepsy, sleep disorders, and other neurological issues.
24 services23 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
15 services15 patients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes 99221
Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.
12 services12 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Franciscan Health Lafayette

Acute Care Hospitals · Lafayette, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number150109
Location1701 S Creasy LnLafayette, IN 47905 · Tippecanoe County
Emergency services Birthing friendly

Ssm Health St Mary's Hospital Jefferson City

Acute Care Hospitals · Jefferson City, MO
3/5 CMS rating
OwnershipProprietary
CMS Certification Number260011
Location2505 Mission DriveJefferson City, MO 65109 · Cole County
Emergency services Birthing friendly

Freeman Health System - Freeman West

Acute Care Hospitals · Joplin, MO
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260137
Location1102 West 32nd StreetJoplin, MO 64804 · Jasper County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 99022 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.99 typical visit price
range $57.27 – $172.80
Typical copayment $32.74 (range $14.31 – $43.20)
Most-billed visit code 99204
Established Patient
$100.78 typical visit price
range $18.56 – $141.11
Typical copayment $25.19 (range $4.64 – $35.27)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marion Fossum's NPI number?

The NPI number for Marion Fossum is 1356875736. It was assigned to this individual provider in the NPPES registry on April 12, 2017.

Where is Marion Fossum located?

Marion Fossum practices at 1717 S Ritchey Rd, Medical Lake, WA 99022. The listed phone number is (509) 590-8766.

What is Marion Fossum's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Marion Fossum enrolled in Medicare?

Yes. Marion Fossum is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Marion Fossum accept?

Health plans from Anthem Blue Cross and Blue Shield, Blue Cross and Blue Shield of NC, CareSource, CommunityCare and Florida Blue (BlueCross BlueShield FL) and 4 other insurers list Marion Fossum as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marion Fossum affiliated with any hospitals?

According to CMS data, Marion Fossum is affiliated with Franciscan Health Lafayette, Ssm Health St Mary's Hospital Jefferson City and Freeman Health System - Freeman West.

When was this NPI record last updated?

The NPPES record for Marion Fossum was last updated on October 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.