Individual provider Active NPI

Matthew W Davis

  • Psychiatric/Mental Health Nurse Practitioner
  • Chelsea, MA
National Provider Identifier
1821963661
Registry record updated Aug 26, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X
License
RN2341205 Issued in MA
Practice address
90 Everett Ave Ste 12
Chelsea, MA 02150-2317
Phone
(617) 307-4228
NPI assigned
Oct 10, 2025
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 26, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Psychiatric/Mental Health Nurse Practitioner 363LP0808X RN2341205 MA Primary

Addresses

Primary practice location

90 Everett Ave Ste 12
Chelsea, MA 02150-2317

Mailing address

90 Everett Ave Ste 12
Chelsea, MA 02150-2317

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

Practice roles

OrganizationSpecialtyStatusNew patients
Northeast Health Services, LLC PastSince Dec 1, 2024 Accepting new patients

Interoperability endpoints

  • FHIR API: https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/

Organizations & group practices 1

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

NPI Registry JSON

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

{
    "created_epoch": "1760054400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787702400000",
    "number": "1821963661",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "90 EVERETT AVE STE 12",
            "city": "CHELSEA",
            "state": "MA",
            "postal_code": "021502317"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "90 EVERETT AVE STE 12",
            "city": "CHELSEA",
            "state": "MA",
            "postal_code": "021502317",
            "telephone_number": "617-307-4228"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DAVIS",
        "first_name": "MATTHEW",
        "middle_name": "W",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-10-10",
        "last_updated": "2026-08-26",
        "certification_date": "2026-08-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "MA",
            "license": "RN2341205",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Chelsea, MA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 26, 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.