Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Oak Leyden Developmental Services

Speech-Language Pathologist in Oak Park, IL · enumerated 2007 · authorized official Melissa Ehmann, Director of Children Services.

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

National Provider Identifier

1033254347

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Registry record

Entity type Organization (Type 2)

Legal business name Oak Leyden Developmental Services

Practice address 411 Chicago Ave, Oak Park, IL, 60302

Phone (708) 524-1050

Fax (708) 524-2469

Enumeration date Feb 21, 2007

Last updated in NPPES Jan 27, 2025

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Secondary

222Q00000X Developmental Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers Secondary

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 070002012 (IL) Secondary

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 070004000 (IL) Secondary

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 070011242 (IL) Secondary

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 070008117 (IL) Secondary

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 056003098 (IL) Secondary

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 056001573 (IL) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 146003481 (IL) Primary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 146005747 (IL) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 146008122 (IL) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 146008222 (IL) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 146008395 (IL) Secondary

Authorized official

Name Melissa Ehmann

Title Director of Children Services

Phone (708) 524-1050

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-01-27. Verify at npiregistry.cms.hhs.gov.

Where is Oak Leyden Developmental Services located?

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

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-27.