Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Cynthia D Onder, MA CCCSLP

Speech-Language Pathologist in Bethesda, MD · enumerated 2006.

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

National Provider Identifier

1538254735

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Registry record

Entity type Individual (Type 1)

Name Mrs. Cynthia D Onder

Credential MA CCCSLP

Sex Female

Practice address 5100 Acacia Ave, Bethesda, MD, 20814

Phone (301) 897-0815

Fax (301) 897-0819

Enumeration date Oct 4, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 1052382 (MD) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 03872 (MD) 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 Cynthia Onder practice?

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

What is the NPI number for Cynthia Onder?

The National Provider Identifier (NPI) for Cynthia Onder is 1538254735, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Jill Healey Speech-Language Pathologist · Bethesda, MD NPI 1790870939 Morgan Mccloskey Speech-Language Pathologist · Bethesda, MD NPI 1730454398

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.