Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Protocol 1 Rehab, LLC

Sports Physical Therapist in Naperville, IL · enumerated 2023 · authorized official William Bolster, Owner.

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

National Provider Identifier

1386321404

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Registry record

Entity type Organization (Type 2)

Legal business name Protocol 1 Rehab, LLC

Practice address 524 W 5th Ave, Naperville, IL, 60563

Phone (630) 362-6055

Enumeration date Jun 30, 2023

Last updated in NPPES Jun 30, 2023

Taxonomy & classification

2251S0007X Sports Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Primary

2251X0800X Orthopedic Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Secondary

Authorized official

Name William Bolster

Title Owner

Phone (630) 362-6055

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 Protocol 1 Rehab, LLC located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2023-06-30. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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William Bolster Chiropractor · Naperville, IL NPI 1861840464 Afferent Influence, LLC Chiropractor · Naperville, IL NPI 1427401447 Michael Szybilski Physical Therapist · Naperville, IL NPI 1205302148

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-30.