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

Mark Hasselman, LCSW

Individual provider Clinical Social Worker · NPI 1255462024

Mark Hasselman, LCSW is a Clinical Social Worker in West Dundee, Illinois. Licensed in Illinois. Registered with an NPI since 2007.

Licensed in
IL
In the registry since
2007
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

See every abbreviation used in this directory →

Practice location Address checks out

745 S 8th St
West Dundee, IL 60118-2108
Phone: (800) 428-7260
Fax: (847) 428-7269
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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 149006334 (IL)

Record details

NPI number1255462024
Entity typeIndividual (Type 1)
GenderMale
Credentials LCSW
Sole proprietorNo
NPI enumeratedMarch 7, 2007
Last updated in NPPESAugust 7, 2008
Mailing address745 S 8th St, West Dundee, IL 60118-2108

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