Organization Active NPI

Theresa Guanci

  • Dentist
  • Boston, MA
National Provider Identifier
1013887066
Registry record updated Nov 6, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
DentistTaxonomy code 122300000X
Legal business name
THERESA GUANCI
Practice address
400 Commonwealth Ave # 104B
Boston, MA 02215-2813
Phone
(617) 536-4620
Fax
(617) 536-3872
NPI assigned
Nov 6, 2025
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Nov 6, 2025

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

Authorized official

Name
Dr. Theresa L. Guanci, DMDNPI 1487067799
Title
Dentist
Phone
(617) 536-4620

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
DentistGroup: 193400000X SINGLE SPECIALTY GROUP 122300000X Primary

Addresses

Primary practice location

400 Commonwealth Ave # 104B
Boston, MA 02215-2813

Mailing address

400 Commonwealth Ave
Boston, MA 02215-2813
Phone (617) 536-4620

National Provider Directory

National Provider Directory

Locations

400 Commonwealth Ave
#104B
Boston, MA 02215
Phone (617) 536-4620

Practitioners & affiliated clinicians

Practitioners 2

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

NPI Registry JSON

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

{
    "created_epoch": "1762387200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1762387200000",
    "number": "1013887066",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "400 COMMONWEALTH AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022152813",
            "telephone_number": "617-536-4620",
            "fax_number": "617-536-3872"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "400 COMMONWEALTH AVE # 104B",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022152813",
            "telephone_number": "617-536-4620",
            "fax_number": "617-536-3872"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "THERESA GUANCI",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-11-06",
        "last_updated": "2025-11-06",
        "certification_date": "2025-11-06",
        "status": "A",
        "authorized_official_last_name": "GUANCI",
        "authorized_official_first_name": "THERESA",
        "authorized_official_middle_name": "L.",
        "authorized_official_title_or_position": "DENTIST",
        "authorized_official_telephone_number": "617-536-4620",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "DMD"
    },
    "taxonomies": [
        {
            "code": "122300000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Dentist",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 6, 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.