MCKENZIE MORTENSEN MS OTR/L
NPI 1336508159
Occupational Therapist in Ann Arbor, MI

Active since February 22, 2016
1540 E HOSPITAL DR, ANN ARBOR, MI 48109(734) 936-4000 Get Directions Write a Review

NPPES record last updated: November 21, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 21, 2025, Aug 14, 2024, Aug 29, 2022 and 2 more (5 updates tracked since 2016).

About Mckenzie Mortensen Ms Otr/l NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MCKENZIE MORTENSEN MS OTR/L (NPI 1336508159) is an individual occupational therapist in Ann Arbor, Michigan, licensed in Michigan (5201012978) and active in the NPI registry since February 2016.

NPPES Registry Identity

NPI1336508159
Entity TypeIndividualFemale
Primary Taxonomy225X00000X
Provider Legal NameMCKENZIE MORTENSENCredential: MS OTR/L
Location Address1540 E HOSPITAL DRAnn Arbor, MI 48109-4000
Mailing Address635 S Maple Rd Ste 2Ann Arbor, MI 48103-3838 · (734) 369-6002
Sole ProprietorNo
Enumeration DateFebruary 22, 2016
Last NPPES UpdateNovember 21, 20255 updates tracked since enumeration
NPPES CertifiedNovember 21, 2025
✔ NPI 1336508159 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOccupational TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Code225X00000X
Licenses✔ Licensed in MI · 5201012978✔ Licensed in NC · 11840✔ Licensed in AZ · 6475
Definition
An occupational therapist is a person who has graduated from an entry-level occupational therapy program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, or approved by the World Federation of Occupational Therapists (WFOT), or an equivalent international occupational therapy education program; has successfully completed a period of supervised fieldwork experience required by the occupational therapy program; has passed a nationally recognized entry-level examination for occupational therapists, and fulfills state requirements for licensure, certification, or registration. An occupational therapist provides interventions based on evaluation and which emphasize the therapeutic use of everyday life activities (i.e., occupations) with individuals or groups for the purpose of facilitating participation in roles and situations and in home, school, workplace, community and other settings. Occupational therapy services are provided for the purpose of promoting health and wellness and are provided to those who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. Occupational therapists address the physical, cognitive, psychosocial, sensory, and other aspects of occupational performance in a variety of contexts to support engagement in everyday life activities that affect health, well-being, and quality of life.
1540 E HOSPITAL DR, Ann Arbor, MI 48109

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mckenzie Mortensen Ms Otr/l is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignment

Medicare enrollment records show Mckenzie Mortensen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Speech-Language Pathologist
635 S MAPLE RD STE 2
Ann Arbor, MI 48103
  • Reassigned Medicare billing, Michigan enrollment
  • 23 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.

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.

Occupational Therapist
1540 E HOSPITAL DR
ANN ARBOR, MI 48109
Pediatrics
1540 E HOSPITAL DR
ANN ARBOR, MI 48109
Pediatrics (Pediatric Cardiology)
1540 E HOSPITAL DR, CW 11-701 SPC 4204
ANN ARBOR, MI 48109
Student in an Organized Health Care Education/Training Program
1540 E HOSPITAL DR
ANN ARBOR, MI 48109
Student in an Organized Health Care Education/Training Program
1540 E HOSPITAL DR
ANN ARBOR, MI 48109
Anesthesiology
1540 E HOSPITAL DR
ANN ARBOR, MI 48109
Pediatrics (Pediatric Cardiology)
1540 E HOSPITAL DR
ANN ARBOR, MI 48109
Social Worker (Clinical)
1540 E HOSPITAL DR
ANN ARBOR, MI 48109

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 Mckenzie Mortensen's NPI number?

The NPI number for Mckenzie Mortensen is 1336508159. It was assigned to this individual provider in the NPPES registry on February 22, 2016.

Where is Mckenzie Mortensen located?

Mckenzie Mortensen practices at 1540 E Hospital Dr, Ann Arbor, MI 48109. The listed phone number is (734) 936-4000.

What is Mckenzie Mortensen's specialty?

The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.

Is Mckenzie Mortensen enrolled in Medicare?

Yes. Mckenzie Mortensen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mckenzie Mortensen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mckenzie Mortensen reassigns Medicare benefits to Aa Therapy Works, LLC (Ann Arbor, MI). 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 Mckenzie Mortensen'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 Mckenzie Mortensen was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.