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

Dr. Gregory Lynn Clark, MD

Individual provider Specialist · NPI 1225141823

Dr. Gregory Lynn Clark, MD is a Specialist in Portland, Oregon. Licensed in Oregon and Washington. Registered with an NPI since 2006.

Licensed in
OR, WA
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

11790 SW Barnes Rd Ste 330
Portland, OR 97225-5934
Phone: (503) 228-4414
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Sleep Medicine (Psychiatry & Neurology) Physician (primary) Taxonomy 2084S0012X · Licence MD18493 (OR)
Specialist Taxonomy 174400000X · Licence OR MD18493 (OR)
Specialist Taxonomy 174400000X · Licence WA MD00035294 (WA)

Record details

NPI number1225141823
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 16, 2006
Last updated in NPPESMarch 10, 2014

Other providers in Portland