NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Gillis, OTR/L

Occupational Therapist in Monroe, MI · enumerated 2026.

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

National Provider Identifier

1316882087

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name William Gillis
Credential OTR/L
Sex Male
Practice address 700 Stewart Rd, Monroe, MI, 48162
Phone (734) 240-1820
Enumeration date Apr 21, 2026
Last updated in NPPES Apr 21, 2026

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 5201010107 (MI) Primary

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 does William Gillis practice?
The practice location on file with NPPES is in Monroe, MI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for William Gillis?
The National Provider Identifier (NPI) for William Gillis is 1316882087, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-21.