1. Home
  2. Directory
  3. Virginia
  4. Herndon
  5. Speech Language Pathologist
  6. NPI Profile

MASSIS SPEECH & LANGUAGE PLLC
NPI 1457227670
Speech-Language Pathologist in Herndon, VA

Active since October 14, 2025
209 ELDEN ST STE 204, HERNDON, VA 20170(571) 329-2658 Get Directions Write a Review

NPPES record last updated: October 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Massis Speech & Language Pllc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MASSIS SPEECH & LANGUAGE PLLC (NPI 1457227670) is a healthcare organization registered as a speech-language pathologist in Herndon, Virginia and active in the NPI registry since October 2025. The organization lists Petra Massis, Owner, as its authorized official.

NPPES Registry Identity

NPI1457227670
Entity TypeOrganization
Primary Taxonomy235Z00000X
Legal Business NameMASSIS SPEECH & LANGUAGE PLLC
Location Address209 ELDEN ST STE 204Herndon, VA 20170-4846
Mailing Address450 Massachusetts Ave Nw Apt 904Washington, DC 20001-6220 · (571) 329-2658
Phone(571) 329-2658
Organization SubpartNo
Authorized OfficialPetra MassisOwner · (571) 329-2658
Enumeration DateOctober 14, 2025
NPPES CertifiedOctober 14, 2025
✔ NPI 1457227670 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
209 ELDEN ST STE 204, Herndon, VA 20170
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CLEARLY SPEAKING SPEECH AND LANGUAGE LLC
Speech-Language Pathologist
209 ELDEN ST STE 204
HERNDON, VA 20170
Fairfax County (703) 435-0488

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Massis Speech & Language PLLC's NPI number?

The NPI number for Massis Speech & Language PLLC is 1457227670. It was assigned to this organization in the NPPES registry on October 14, 2025.

Where is Massis Speech & Language PLLC located?

Massis Speech & Language PLLC is located at 209 Elden St Ste 204, Herndon, VA 20170. The listed phone number is (571) 329-2658.

What is Massis Speech & Language PLLC's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

When was this NPI record last updated?

The NPPES record for Massis Speech & Language PLLC was last updated on October 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.