ILLENA K KLASSEN LCSW
NPI 1316190192
Social Worker - Clinical in Littleton, CO
About Illena K Klassen Lcsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ILLENA K KLASSEN LCSW (NPI 1316190192) is an individual clinical provider in Littleton, Colorado, licensed in Colorado (905) and active in the NPI registry since October 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in Englewood.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Illena K Klassen Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Illena Klassen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Denver, CO 80247
- Reassigned Medicare billing, Colorado enrollment
- Medicare enrollment name: Colorado Permanente Medical Group PC
- 1,715 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80123 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Illena Klassen's NPI number?
The NPI number for Illena Klassen is 1316190192. It was assigned to this individual provider in the NPPES registry on October 24, 2008. The provider is also known as Illena K Boller Lcsw.
Where is Illena Klassen located?
Illena Klassen practices at 5257 S Wadsworth Blvd, Littleton, CO 80123. The listed phone number is (303) 338-4545.
What is Illena Klassen's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Illena Klassen enrolled in Medicare?
Yes. Illena Klassen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Illena Klassen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Illena Klassen reassigns Medicare benefits to Colorado Permanente Medical Group, P.C. (Denver, CO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Illena Klassen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Illena Klassen was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Illena K Klassen, LCSW · NPI 1316190192
Clinical provider in Littleton, Colorado. Individual provider, active in the CMS NPPES registry since October 24, 2008.
## Identity
- **NPI:** 1316190192 (Entity type: Individual)
- **Enumerated:** October 24, 2008
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 905 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 5257 S WADSWORTH BLVD, Littleton, CO 80123-2228
- **Phone:** (303) 338-4545
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Colorado Permanente Medical Group, P.C. (NPI 1760599724, Denver, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 21, 2022
- **Other identifiers:** Medicaid 91139767 (CO); Other 021503 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1316190192) · Data from the CMS NPPES public registry.