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

Melissa M Williamson, CADCI

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1184822033

Melissa M Williamson, CADCI is an Addiction (Substance Use Disorder) Counselor in Oregon City, Oregon. Registered with an NPI since 2007.

In the registry since
2007

Practice location Address checks out

998 Library Ct
Oregon City, OR 97045-4041
Phone: (503) 655-8401
Fax: (503) 655-8429
Show map & directions

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

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X

Record details

NPI number1184822033
Entity typeIndividual (Type 1)
GenderFemale
Credentials CADCI
Sole proprietorNo
NPI enumeratedJuly 3, 2007
Last updated in NPPESJuly 8, 2007

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