Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Peak Performance

Physical Therapist in Western Springs, IL · enumerated 2018 · authorized official Jonathan Loos, Provider.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1871081158

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Peak Performance

Other name <Unavail>

Practice address 821 Burlington Ave Lowr Level, Western Springs, IL, 60558

Phone (708) 261-8458

Enumeration date Apr 23, 2018

Last updated in NPPES May 3, 2018

Taxonomy & classification

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 070020116 (IL) Primary

Authorized official

Name Jonathan Loos

Title Provider

Phone (630) 514-9199

Other identifiers

Identifier	Type	State	Issuer
1336573591	Other	IL	MEDICARE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Peak Performance located?

The practice location on file with NPPES is in Western Springs, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2018-05-03. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-03.