Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stephanie Mastri

Speech-Language Pathologist in Warrenton, VA · enumerated 2018.

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

National Provider Identifier

1114416633

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Registry record

Entity type Individual (Type 1)

Name Stephanie Mastri

Sex Female

Practice address 6176 Dumfries Rd, Warrenton, VA, 20187

Phone (540) 422-7670

Fax (540) 422-7689

Enumeration date May 10, 2018

Last updated in NPPES May 10, 2018

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

Where does Stephanie Mastri practice?

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

What is the NPI number for Stephanie Mastri?

The National Provider Identifier (NPI) for Stephanie Mastri is 1114416633, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-10.