MARY ANNE LANDRETH OT
NPI 1790796985
Occupational Therapist in Chicago, IL
About Mary Anne Landreth Ot NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY ANNE LANDRETH OT (NPI 1790796985) is an individual occupational therapist in Chicago, Illinois, licensed in Illinois (056-007516) and active in the NPI registry since August 2006. She is a graduate of Other (2001).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mary Anne Landreth Ot is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Mary Landreth reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60643
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Athletic And Therapeutic Institute Of Naperville, LLC
- 501 clinicians in this Medicare group
Western Springs, IL 60558
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Hinsdale Orthopaedic Associates, S.C.
- 58 clinicians in this Medicare group
Orland Park, IL 60467
- Reassigned Medicare billing, Illinois enrollment
- 40 clinicians in this Medicare group
Downers Grove, IL 60515
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Athletic And Therapeutic Institute Of Bourbonnais, LLC
- 408 clinicians in this Medicare group
Bannockburn, IL 60015
- Reassigned Medicare billing, Illinois enrollment
- 538 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Mary Landreth's NPI number?
The NPI number for Mary Landreth is 1790796985. It was assigned to this individual provider in the NPPES registry on August 11, 2006. The provider is also known as Mary A Dykstra Ot.
Where is Mary Landreth located?
Mary Landreth practices at 9645 S Western Ave, Chicago, IL 60643. The listed phone number is (773) 239-2734.
What is Mary Landreth's specialty?
The primary specialty registered for this NPI is Occupational Therapist with taxonomy code 225X00000X.
Is Mary Landreth enrolled in Medicare?
Yes. Mary Landreth is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mary Landreth's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Landreth reassigns Medicare benefits to 5 organizations: Athletic & Therapeutic Institute Of Naperville, LLC (Chicago, IL), Hinsdale Orthopaedic Associates, Sc (Western Springs, IL), Midwest Orthopedic Consultants Sc (Orland Park, IL), Athletic & Therapeutic Institute Of Bourbonnais, LLC (Downers Grove, IL) and Illinois Bone And Joint Institute LLC (Bannockburn, IL). Each 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 Mary Landreth's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Landreth accept?
Health plans from Oscar Health list Mary Landreth as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Mary Landreth was last updated on July 5, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.