Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Margaret Gruber, OTR

Occupational Therapist in Oak Park, IL · enumerated 2017 · practices at M Street Pediatric Therapy Corp.

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

National Provider Identifier

1659890267

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Registry record

Entity type Individual (Type 1)

Name Margaret Gruber

Credential OTR

Sex Female

Practice address 719 N Marion St, Oak Park, IL, 60302

Phone (855) 678-7338

Enumeration date Sep 14, 2017

Last updated in NPPES Aug 26, 2025

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 056012115 (IL) 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.

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Frequently asked questions

Where does Margaret Gruber practice?

The practice location on file with NPPES is in Oak Park, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Margaret Gruber?

The National Provider Identifier (NPI) for Margaret Gruber is 1659890267, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Deisy Maldonado Pediatric Occupational Therapist · Oak Park, IL NPI 1154771863 Lindsay Hoffer Speech-Language Pathologist · Oak Park, IL NPI 1144771981 M Street Pediatric Therapy Corp Pediatric Physical Therapist · Oak Park, IL NPI 1588193593 Julie Kappas Pediatric Occupational Therapist · Oak Park, IL NPI 1164066940 Katelyn Kruszynski Occupational Therapist · Oak Park, IL NPI 1669017752 Allison Hutchinson Speech-Language Pathologist · Oak Park, IL NPI 1457979023 Stephanie Richardson Pediatric Physical Therapist · Oak Park, IL NPI 1164033494 Hannah Caldwell Speech-Language Assistant · Oak Park, IL NPI 1639752777

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-26.