What is Marion Fossum's NPI number?

Marion Fossum's National Provider Identifier (NPI) is 1356875736, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Marion Fossum's specialty?

Marion Fossum is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).

Where is Marion Fossum located?

Marion Fossum's practice location on file with NPPES is 1717 S Ritchey Rd, Medical Lake, WA 99022-8792.

What is Marion Fossum's phone number?

The practice phone number listed in the NPPES registry for Marion Fossum is (509) 590-8766.

Does Marion Fossum accept Medicare?

Marion Fossum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Marion Fossum's NPI active?

Yes — Marion Fossum's NPI (1356875736) is active in the NPPES registry as of the last update on 2025-10-16.

IndividualActiveAccepts Medicare

Marion Fossum, MD

NPI 1356875736 · Neurology Physician · Medical Lake, WA

Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Marion Fossum, MD is a Neurology Physician provider in Medical Lake, WA (NPI 1356875736).

Provider details

NPI number: 1356875736
Entity type: Individual
Primary specialty: Neurology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 33801 (MS)

Specialties & taxonomies

Neurology PhysicianPrimary2084N0400XLicense 2024012104 (MO)
Allopathic & Osteopathic Physicians
Neurology Physician2084N0400XLicense 33801 (MS)
Allopathic & Osteopathic Physicians
Neurology Physician2084N0400XLicense 83574-20 (WI)
Allopathic & Osteopathic Physicians
Neurology Physician2084N0400XLicense 61254901 (WA)
Allopathic & Osteopathic Physicians
Neurology Physician2084N0400XLicense 2024-00610 (NC)
Allopathic & Osteopathic Physicians
Neurology Physician2084N0400XLicense 26243 (NV)
Allopathic & Osteopathic Physicians

Profile Score

Established profile(59/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
9 yrs in NPPES registry
Profile completeness28% of score
100% of core fields populated
Practice footprint17% of score
8 documented practice locations
Medicare service volume (vs. specialty peers)28% of score
119 Medicare services, 2024 (ranked within specialty)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231	68	$46
Measurement of Brain Wave Activity (eeg), Awake and Asleep95819	24	$52
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	15	$62
Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221	12	$77

Typical Medicare-allowed amounts for these services range $46–$77 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

Practice location

1717 S Ritchey Rd

Medical Lake, WA 99022-8792

Phone: (509) 590-8766

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Mailing address