Individual provider Active NPI

Gregory J Howarth, PA

  • Physician Assistant
  • Boston, MA
National Provider Identifier
1508114018
Registry record updated Dec 7, 2022
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
PA4465 Issued in MA
Practice address
1 Boston Medical Ctr PL FL Place1
Boston, MA 02118-2908
Phone
(617) 414-5481
NPI assigned
Aug 15, 2012
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 7, 2022

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Medical Physician Assistant 363AM0700X PA4465 MA
Physician Assistant 363A00000X PA4465 MA Primary

Addresses

Primary practice location

1 Boston Medical Ctr PL FL Place1
Boston, MA 02118-2908

Mailing address

801 Albany St FL Street1
Boston, MA 02119-2560
Phone (617) 414-5405

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20121108000422 MA Practitioner - Physician Assistant 8527219179 Reassigns benefits to 7 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2012
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

55 Fruit St
Boston, MA 02114-2696
Phone (617) 724-0287

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Martha'S Vineyard Hospital, Inc. Current Accepting new patients
Martha'S Vineyard Hospital, Inc. CurrentSince Sep 5, 2025 Accepting new patients
Massachusetts General Physicians Organization Inc CurrentSince Mar 23, 2023 Accepting new patients
General Hospital Corp Current Accepting new patients
Martha'S Vineyard Hospital, Inc. CurrentSince Sep 5, 2025 Accepting new patients

Locations

75 Francis St
Boston, MA 02115

55 Fruit St
Boston, MA 02114

55 Fruit St
#2
Boston, MA 02114
Phone (617) 726-2967

1 Hospital Rd
Oak Bluffs, MA 02557
Phone (508) 684-4500

Interoperability endpoints

  • Direct secure messaging: howarth.gregory.mgh@direct.partners.masshiway.net

Organizations & group practices 9

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.

Hospital & facility affiliations 2

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

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

{
    "created_epoch": "1344988800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1670371200000",
    "number": "1508114018",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "801 ALBANY ST FL STREET1",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021192560",
            "telephone_number": "617-414-5405"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 BOSTON MEDICAL CTR PL FL PLACE1",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021182908",
            "telephone_number": "617-414-5481"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOWARTH",
        "first_name": "GREGORY",
        "middle_name": "J",
        "credential": "PA",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2012-08-15",
        "last_updated": "2022-12-07",
        "certification_date": "2022-12-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363AM0700X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Medical",
            "state": "MA",
            "license": "PA4465",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MA",
            "license": "PA4465",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.