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

Donna J. Mahnen, LCSW

Individual provider Clinical Social Worker · NPI 1215929385

Donna J. Mahnen, LCSW is a Clinical Social Worker in Denver, Colorado. Licensed in Colorado. Registered with an NPI since 2005.

Licensed in
CO
In the registry since
2005
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

1405 Federal Blvd
Denver, CO 80204-2211
Phone: (303) 504-1500
Fax: (303) 825-1711
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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 992535 (CO)

Record details

NPI number1215929385
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedAugust 16, 2005
Last updated in NPPESJuly 13, 2026

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