ATI PHYSICAL THERAPY
NPI 1396939104
Physical Therapist in Chicago, IL

Active since September 05, 2007
9645 S WESTERN AVE, CHICAGO, IL 60643(773) 239-2734(773) 239-2784 Get Directions Write a Review

NPPES record last updated: April 6, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Ati Physical Therapy NPPES

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

ATI PHYSICAL THERAPY (NPI 1396939104) is a healthcare organization registered as a physical therapist in Chicago, Illinois and active in the NPI registry since September 2007. The organization lists Lynn Mcgivern, Chief Compliance Officer, as its authorized official.

NPPES Registry Identity

NPI1396939104
Entity TypeOrganization
Primary Taxonomy225100000X
Legal Business NameATHLETIC & THERAPEUTIC INSTITUTE OF NAPERVILLE, LLC
Location Address9645 S WESTERN AVEChicago, IL 60643-1722
Mailing Address4947 Paysphere CirChicago, IL 60674-0049 · (630) 296-2223
Fax(773) 239-2784
Organization SubpartNo
Authorized OfficialLynn McgivernChief Compliance Officer · (630) 296-2222
Enumeration DateSeptember 5, 2007
Last NPPES UpdateApril 6, 2011
✔ NPI 1396939104 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysical TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Code225100000X
Definition
Physical therapists (PTs) are licensed health care professionals who diagnose and treat individuals of all ages, from newborns to the very oldest, who have medical problems or other health-related conditions that limit their abilities to move and perform functional activities in their daily lives. PTs examine each individual and develop a plan using treatment techniques to promote the ability to move, reduce pain, restore function, and prevent disability. In addition, PTs work with individuals to prevent the loss of mobility before it occurs by developing fitness- and wellness-oriented programs for healthier and more active lifestyles. PTs:
  • Diagnose and manage movement dysfunction and enhance physical and functional abilities.
  • Restore, maintain, and promote not only optimal physical function but optimal wellness and fitness and optimal quality of life as it relates to movement and health.
  • Prevent the onset, symptoms, and progression of impairments, functional limitations, and disabilities that may result from diseases, disorders, conditions, or injuries.
  • Treat conditions of the musculoskeletal, neuromuscular, cardiovascular, pulmonary, and/or integumentary systems.
  • Address the negative effects attributable to unique personal and environmental factors as they relate to human performance.
PTs provide care for people in a variety of settings, including hospitals, private practices, outpatient clinics, home health agencies, schools, sports and fitness facilities, work settings, and nursing homes. State licensure is required in each state in which a PT practices.
9645 S WESTERN AVE, Chicago, IL 60643

Other Names 1

Doing Business AsAti Physical Therapy

Other Identifiers 5

Other610078604IL · Department Of Labor Provider Number
Medicare PIN215696IL
Medicare PINDD3861IL
Medicare PIN211585IL
Medicare PIN216859IL

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ati Physical Therapy is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by March 31, 2027

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateIllinoisEnrollment IDO20040903000494Non-DME Part B · Physical/Occupational Therapy Group in Private PracticeDue dateMarch 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

501

Medicare enrollment records show 501 clinicians reassign Medicare billing to Ati Physical Therapy, which bills Medicare for the services they deliver. Of these, 17 practice at this address and 83 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 2

Physical Therapist in Private Practice455
Occupational Therapist in Private Practice46

Nearest to this location (20)

See all 501
Physical Therapist in Private Practice
NPI 1164258091
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Occupational Therapist in Private Practice
NPI 1700381944
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1598095564
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Occupational Therapist in Private Practice
NPI 1710836556
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Occupational Therapist in Private Practice
NPI 1376355776
9645 S WESTERN AVE
Chicago, IL 60643
(773) 302-1940
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1154858421
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1801329727
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1922722156
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Occupational Therapist in Private Practice
NPI 1508096041
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Occupational Therapist in Private Practice
NPI 1790796985
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1669921797
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-9645
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1861942351
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1215764139
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Occupational Therapist in Private Practice
NPI 1386907640
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Occupational Therapist in Private Practice
NPI 1235241506
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1912509977
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1164779609
9645 S WESTERN AVE
Chicago, IL 60643
(773) 239-2734
✔ Accepts MedicareSame address
Physical Therapist in Private Practice
NPI 1518450709
10801 S WESTERN AVE
Chicago, IL 60643
(773) 596-3700
✔ Accepts Medicare1.4 mi
Physical Therapist in Private Practice
NPI 1528614583
4061 W 95TH ST
Oak Lawn, IL 60453
(847) 841-2811
✔ Accepts Medicare2.2 mi
Physical Therapist in Private Practice
NPI 1548246580
4220 W 95TH ST STE 100
Oak Lawn, IL 60453
(708) 226-4431
✔ Accepts Medicare2.4 mi
See all 501 clinicians

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 Athletic & Therapeutic Institute Of Naperville, LLC's NPI number?

The NPI number for Athletic & Therapeutic Institute Of Naperville, LLC is 1396939104. It was assigned to this organization in the NPPES registry on September 5, 2007. The provider is doing business as Ati Physical Therapy.

Where is Athletic & Therapeutic Institute Of Naperville, LLC located?

Athletic & Therapeutic Institute Of Naperville, LLC is located at 9645 S Western Ave, Chicago, IL 60643. The listed phone number is (773) 239-2734.

What is Athletic & Therapeutic Institute Of Naperville, LLC's specialty?

The primary specialty registered for this NPI is Physical Therapist with taxonomy code 225100000X.

Is Athletic & Therapeutic Institute Of Naperville, LLC enrolled in Medicare?

Yes. Athletic & Therapeutic Institute Of Naperville, LLC is registered in the Medicare PECOS enrollment system.

When is Athletic & Therapeutic Institute Of Naperville, LLC's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Illinois, Physical/Occupational Therapy Group in Private Practice) is due for revalidation by March 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Athletic & Therapeutic Institute Of Naperville, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 501 clinicians in 2 Medicare specialties reassign their Medicare billing to Athletic & Therapeutic Institute Of Naperville, LLC. 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. The largest specialties are Physical Therapist in Private Practice (455) and Occupational Therapist in Private Practice (46). Of these, 17 practice at this address and 83 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Athletic & Therapeutic Institute Of Naperville, LLC was last updated on April 6, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.