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

Jeffrey James Knowles, MD

Individual provider Psychiatry Physician · NPI 1376618694

Jeffrey James Knowles, MD is a Psychiatry Physician in Salem, Oregon. Licensed in Oregon. Registered with an NPI since 2006.

Licensed in
OR
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2600 Center St NE Oregon State Hospital Salem
Salem, OR 97301
Phone: (503) 945-2800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence MD22536 (OR)

Record details

NPI number1376618694
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 21, 2006
Last updated in NPPESJuly 8, 2007
Mailing addressPo Box 14900, State Of Oregon Irs Init, Salem, OR 97309-5016

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