Massis Speech & Language PLLC

Primary specialty

Speech-Language PathologistTaxonomy code 235Z00000X

Legal business name

MASSIS SPEECH & LANGUAGE PLLC

Practice address

209 Elden St Ste 204
Herndon, VA 20170-4846

Phone

(571) 329-2658

NPI assigned

Oct 14, 2025

Organization subpart

No

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name

Petra Massis, M.A., CCC-SLPNPI 1073255618

Title

Owner

Phone

(571) 329-2658

Specialties & licenses 1

Addresses

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Petra Massis, CCC-SLP

  • Speech-Language Pathologist
  • Herndon, VA
  • NPI 1073255618
  NPD Authorized official

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1760400000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1760400000000",
    "number": "1457227670",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "450 MASSACHUSETTS AVE NW APT 904",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200016220",
            "telephone_number": "571-329-2658"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "209 ELDEN ST STE 204",
            "city": "HERNDON",
            "state": "VA",
            "postal_code": "201704846",
            "telephone_number": "571-329-2658"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MASSIS SPEECH & LANGUAGE PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-10-14",
        "last_updated": "2025-10-14",
        "certification_date": "2025-10-14",
        "status": "A",
        "authorized_official_last_name": "MASSIS",
        "authorized_official_first_name": "PETRA",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "571-329-2658",
        "authorized_official_credential": "M.A., CCC-SLP"
    },
    "taxonomies": [
        {
            "code": "235Z00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Speech-Language Pathologist",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Leslie Marie Martin, LCSW, CSAC
• Adrienne Nicole Martinez
• Daniel F Martino, LPC, CSAC
• Sofia Marzo
• Jason Leo Maslow, PA
• Maher Massis
• Petra Massis, CCC-SLP
• Deepika Mathialagan
• Hunter Daniel Mathias, DPT, PT, ATC, AEMT
• Mavens DME Care Supply LLC

• Speech-Language Pathologist in Herndon, VA
• Providers in Herndon, VA by specialty
• Speech-Language Pathologist in Virginia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 14, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.