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

Matthew B Ellefson, SUDP

Individual provider Addiction (Substance Use Disorder) Counselor · NPI 1609574144

Matthew B Ellefson, SUDP is an Addiction (Substance Use Disorder) Counselor in Seattle, Washington. Licensed in Washington. Registered with an NPI since 2023.

Licensed in
WA
In the registry since
2023

Practice location Address checks out

1618 S Lane St
Seattle, WA 98144-2829
Phone: (206) 550-5894
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

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

Record details

NPI number1609574144
Entity typeIndividual (Type 1)
GenderMale
Credentials SUDP
Sole proprietorNo
NPI enumeratedFebruary 22, 2023
Last updated in NPPESFebruary 22, 2023
Certification dateFebruary 22, 2023
Mailing address1618 S Lane St, Seattle, WA 98144-2829

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