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

Sonja Marie Halverson, LCSW

Individual provider Social Worker · NPI 1740966555

Sonja Marie Halverson, LCSW is a Clinical Social Worker in Spearfish, South Dakota. Qualified in 2022, 4 years ago. Licensed in South Dakota.

Years since qualifying
4
Licensed in
SD
In the registry since
2023
Specialties on file
2
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

115 N 7th St Ste 6
Spearfish, SD 57783-2710
Phone: (605) 645-0100
Fax: (605) 717-1009
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 6391 (SD)
Social Worker Taxonomy 104100000X · Licence 6391 (SD)

Record details

NPI number1740966555
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedJune 26, 2023
Last updated in NPPESMarch 14, 2024
Certification dateMarch 14, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Accepts Medicare assignment Not indicated

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