Lena Lax NP, PLLC

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

Legal business name

LENA LAX NP, PLLC

Practice address

55 Davis SQ Ste 311
Somerville, MA 02144-2900

Phone

(617) 334-5155

NPI assigned

Oct 5, 2026

Last updated

Oct 5, 2026By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Lena Lax, NPNPI 1417406976

Title

Provider, Owner

Phone

(617) 334-5155

Specialties & licenses 2

Addresses

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Lena Lax, NP

  • Psychiatric/Mental Health Nurse Practitioner
  • Somerville, MA
  • NPI 1417406976

  Multi-Specialty

  NPD (past) Authorized official

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

{
    "created_epoch": "1791158400000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1791158400000",
    "number": "1205730017",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "55 DAVIS SQ STE 311",
            "city": "SOMERVILLE",
            "state": "MA",
            "postal_code": "021442900",
            "telephone_number": "617-334-5155"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 DAVIS SQ STE 311",
            "city": "SOMERVILLE",
            "state": "MA",
            "postal_code": "021442900",
            "telephone_number": "617-334-5155"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "LENA LAX NP, PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-10-05",
        "last_updated": "2026-10-05",
        "certification_date": "2026-10-05",
        "status": "A",
        "authorized_official_last_name": "LAX",
        "authorized_official_first_name": "LENA",
        "authorized_official_title_or_position": "PROVIDER, OWNER",
        "authorized_official_telephone_number": "617-334-5155",
        "authorized_official_credential": "NP"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Karen Lefkowitz, APRN
• Shani Leichter, LMHC
• Rosalie A. Leininger, CEIS
• Alison Ann Lemme, PA
• Katherine Lemons, PA-C, MS, CNS
• Henry M Leno, PHARMD
• Caitlin Leonard, PTA
• Sandra Ann Leonardi I, P.T.A.
• Patrick Leong, DO
• Philip S Leung, RPH

• Psychiatric/Mental Health Nurse Practitioner in Somerville, MA
• Providers in Somerville, MA by specialty
• Psychiatric/Mental Health Nurse Practitioner in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 5, 2026; 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.