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

Dr. Merle Dean Williamson, MD

Individual provider Addiction Medicine (Anesthesiology) Physician · NPI 1467465823

Dr. Merle Dean Williamson, MD is an Addiction Medicine (Anesthesiology) Physician in Happy Valley, 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.

See every abbreviation used in this directory →

Practice location Address checks out

11167 SE Valley View Ter
Happy Valley, OR 97086-9715
Phone: (503) 880-4852
Fax: (503) 698-5268
Show map & directions

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

Specialties & licences

Addiction Medicine (Anesthesiology) Physician (primary) Taxonomy 207LA0401X · Licence MD14580 (OR)

Record details

NPI number1467465823
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 15, 2006
Last updated in NPPESJune 29, 2012