MARI MORTENSEN LCSW PLLC
NPI 1780412403
Social Worker - Clinical in Oak Park, IL
About Mari Mortensen Lcsw Pllc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARI MORTENSEN LCSW PLLC (NPI 1780412403) is a healthcare organization registered as a clinical in Oak Park, Illinois and active in the NPI registry since July 2024. The organization lists Mari Mortensen, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mari Mortensen Lcsw Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Mari Mortensen Lcsw PLLC, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Mari Mortensen Lcsw PLLC's NPI number?
The NPI number for Mari Mortensen Lcsw PLLC is 1780412403. It was assigned to this organization in the NPPES registry on July 24, 2024.
Where is Mari Mortensen Lcsw PLLC located?
Mari Mortensen Lcsw PLLC is located at 101 N Marion St Ste 300, Oak Park, IL 60301. The listed phone number is (708) 650-4356.
What is Mari Mortensen Lcsw PLLC's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Mari Mortensen Lcsw PLLC enrolled in Medicare?
Yes. Mari Mortensen Lcsw PLLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mari Mortensen Lcsw PLLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Social Worker) reassigns their Medicare billing to Mari Mortensen Lcsw PLLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Mari Mortensen Lcsw PLLC was last updated on February 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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.