Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Deirdre Elizabeth Walsh, SLP

Speech-Language Pathologist in Belmont, MA · enumerated 2026.

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

National Provider Identifier

1417809435

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Registry record

Entity type Individual (Type 1)

Name Ms. Deirdre Elizabeth Walsh

Credential SLP

Sex Female

Practice address Belmont, MA, 02478

Phone (617) 943-5030

Enumeration date Feb 11, 2026

Last updated in NPPES Feb 11, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License SLP3933 (MA) Primary

SLP · Speech-Language Pathologist: A licensed clinician treating speech, language, and swallowing disorders. About the SLP credential

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 Deirdre Walsh practice?

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

What is the NPI number for Deirdre Walsh?

The National Provider Identifier (NPI) for Deirdre Walsh is 1417809435, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-11.