Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marion Arthur Fossum, MD

Neurology Physician in Medical Lake, WA · enumerated 2017.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1356875736

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Marion Arthur Fossum

Credential MD

Sex Male

Practice address 1717 S Ritchey Rd, Medical Lake, WA, 99022

Phone (509) 590-8766

Enumeration date Apr 12, 2017

Last updated in NPPES Oct 16, 2025

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 33801 (MS) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 83574-20 (WI) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 2024012104 (MO) Primary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 61254901 (WA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 2024-00610 (NC) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 26243 (NV) Secondary

2084N0600X Clinical Neurophysiology Physician Allopathic & Osteopathic Physicians · License 61254901 (WA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License ME167370 (FL) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 0101281448 (VA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 25MA12260400 (NJ) Secondary

2084E0001X Epilepsy Physician Allopathic & Osteopathic Physicians · License 61254901 (WA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 036.169354 (IL) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License MD220784 (OR) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 01092935A (IN) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Marion Fossum's NPI record?

Cross-check NPI 1356875736 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356875736 active?

Yes, as of the latest NPPES snapshot, NPI 1356875736 is active (record last updated 2025-10-16).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-16.