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

William Edward Mosiman, MD

Individual provider Child & Adolescent Psychiatry Physician · NPI 1497771372

William Edward Mosiman, MD is a Child & Adolescent Psychiatry Physician in LA Grande, Oregon. Licensed in Oregon. Registered with an NPI since 2006.

Licensed in
OR
In the registry since
2006
Specialties on file
2
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

1100 K Ave
LA Grande, OR 97850-2131
Phone: (541) 962-8868
Fax: (541) 963-5272
Show map & directions

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

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence MD14186 (OR)
Child & Adolescent Psychiatry Physician Taxonomy 2084P0804X · Licence MD14186 (OR)

Record details

NPI number1497771372
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 14, 2006
Last updated in NPPESSeptember 11, 2025
Mailing address1100 K Ave, La Grande, OR 97850-2131