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

Individual provider Clinical Social Worker · NPI 1316190192

Illena K Klassen, LCSW is a Clinical Social Worker in Littleton, Colorado. Qualified in 2000, 26 years ago. Practices with Colorado Permanente Medical Group PC, a 1,325-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Colorado.

Years since qualifying
26
Licensed in
CO
In the registry since
2008
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

5257 S Wadsworth Blvd
Littleton, CO 80123-2228
Phone: (303) 338-4545
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2955 S Broadway, Englewood, CO 80113-1526 — (303) 338-4545

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 905 (CO)

Record details

NPI number1316190192
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedOctober 24, 2008
Last updated in NPPESJuly 21, 2022
Certification dateFebruary 3, 2022

Medicare enrollment

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

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Colorado Permanente Medical Group Pc — 1325 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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