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

Nancy Ann Thieman, LISW

Individual provider Mental Health Counselor · NPI 1699095919

Nancy Ann Thieman, LISW is a Clinical Social Worker in Sioux City, Iowa. Qualified in 2008, 18 years ago. Practices with Siouxland Mental Health Services Inc, a 31-clinician group and accepts Medicare assignment. Licensed in Iowa and Nebraska.

Years since qualifying
18
Licensed in
IA, NE
In the registry since
2010
Specialties on file
2
What do these letters mean?
LISW — Licensed Independent Social Worker
A social worker licensed to practise independently.

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Practice location Address checks out

625 Court St
Sioux City, IA 51101-1919
Phone: (712) 252-3871
Fax: (712) 252-3157
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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 007113 (IA)
Mental Health Counselor Taxonomy 101YM0800X · Licence 6715 (NE)

Record details

NPI number1699095919
Entity typeIndividual (Type 1)
GenderFemale
Credentials LISW
Sole proprietorNo
NPI enumeratedJune 9, 2010
Last updated in NPPESJune 1, 2022
Certification dateJune 1, 2022
Mailing address625 Court Street, Sioux City, IA 51101-1919

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Siouxland Mental Health Services Inc — 31 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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