Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Isabelle Marie Porter

Speech-Language Pathologist in Lexington, MA · enumerated 2023.

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

National Provider Identifier

1538853486

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Registry record

Entity type Individual (Type 1)

Name Isabelle Marie Porter

Sex Female

Practice address 110 Hartwell Ave Ste 350, Lexington, MA, 02421

Phone (781) 862-4500

Enumeration date Jun 5, 2023

Last updated in NPPES Jun 5, 2023

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers 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

What is the NPI number for Isabelle Porter?

The National Provider Identifier (NPI) for Isabelle Porter is 1538853486, a Type 1 (individual) record in the CMS NPPES registry.

Where does Isabelle Porter practice?

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

Other providers at this practice address

Browse all →

Leigh Anne White Speech-Language Pathologist · Lexington, MA NPI 1821655606 Kelly Stratford Speech-Language Pathologist · Lexington, MA NPI 1063068112

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-05.