Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Marion Arthur Fossum, MD

Individual provider Neurology Physician · NPI 1356875736

Marion Arthur Fossum, MD is a Neuropsychiatry in Medical Lake, Washington. Qualified in 2016, 10 years ago. Practices with Hendricks County Hospital, a 340-clinician group, works from 8 locations, accepts Medicare assignment and offers telehealth. Licensed in Florida, Illinois, Indiana and Missouri and 8 more.

Years since qualifying
10
Licensed in
FL, IL, IN, MO, MS, NC
In the registry since
2017
Specialties on file
14
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1717 S Ritchey Rd
Medical Lake, WA 99022-8792
Phone: (509) 590-8766
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (7)

  • 2041 Georgia Ave Nw # 5b05, Washington, DC 20060 — (202) 865-6611
  • 1701 S Creasy Ln, Lafayette, IN 47905-4972 — (765) 502-4400
  • 6000 Hospital Dr, Hannibal, MO 63401-6887 — (573) 629-3342
  • 1102 W 32nd St, Joplin, MO 64804-3503 — (417) 347-4570
  • 200 Hawthorne Ln, Charlotte, NC 28204-2515 — (704) 384-9437
  • 90 Presidential Plz # 4, Syracuse, NY 13202-2240 — (315) 464-4243
  • 19300 Sw 65th Ave, Tualatin, OR 97062-7706 — (503) 692-1212

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence 2024012104 (MO)
Neurology Physician Taxonomy 2084N0400X · Licence 33801 (MS)
Neurology Physician Taxonomy 2084N0400X · Licence 83574-20 (WI)
Neurology Physician Taxonomy 2084N0400X · Licence 61254901 (WA)
Neurology Physician Taxonomy 2084N0400X · Licence 2024-00610 (NC)
Neurology Physician Taxonomy 2084N0400X · Licence 26243 (NV)
Clinical Neurophysiology Physician Taxonomy 2084N0600X · Licence 61254901 (WA)
Neurology Physician Taxonomy 2084N0400X · Licence ME167370 (FL)
Neurology Physician Taxonomy 2084N0400X · Licence 0101281448 (VA)
Neurology Physician Taxonomy 2084N0400X · Licence 25MA12260400 (NJ)
Epilepsy Physician Taxonomy 2084E0001X · Licence 61254901 (WA)
Neurology Physician Taxonomy 2084N0400X · Licence 036.169354 (IL)
Neurology Physician Taxonomy 2084N0400X · Licence MD220784 (OR)
Neurology Physician Taxonomy 2084N0400X · Licence 01092935A (IN)

Record details

NPI number1356875736
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 12, 2017
Last updated in NPPESOctober 16, 2025
Certification dateOctober 16, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROPSYCHIATRY
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Hendricks County Hospital — 340 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations10 on file with Medicare