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

Mari Mortensen LCSW PLLC

Organization Clinical Social Worker · NPI 1780412403

Mari Mortensen LCSW PLLC is a Clinical Social Worker in Oak Park, Illinois. Registered with an NPI since 2024.

In the registry since
2024
Specialties on file
2
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

101 N Marion St Ste 300
Oak Park, IL 60301-1023
Phone: (708) 650-4356
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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
Adolescent and Children Mental Health Clinic/Center Taxonomy 261QM0855X

Record details

NPI number1780412403
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mari Mortensen — Owner · (708) 650-4356
NPI enumeratedJuly 24, 2024
Last updated in NPPESFebruary 27, 2025
Certification dateFebruary 27, 2025
Mailing address9265 Waterfall Glen Blvd, Darien, IL 60561-5282

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