Individual provider Active NPI

Marion Joan Mansfield, MD

  • Pediatric Endocrinology Physician
  • Boston, MA
National Provider Identifier
1023054251
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pediatric Endocrinology PhysicianTaxonomy code 2080P0205X
License
44627 Issued in MA
Practice address
1 Joslin Place
Joslin Diabetes Center
Boston, MA 02215
Phone
(617) 732-2603
NPI assigned
Jun 22, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Pediatric Adolescent Medicine Physician 2080A0000X 44627 MA
Pediatric Endocrinology Physician 2080P0205X 44627 MA Primary

Addresses

Primary practice location

1 Joslin Place
Joslin Diabetes Center
Boston, MA 02215

Mailing address

12 Mackintosh LN
Lincoln, MA 01773-3204
Phone (781) 259-9863

Other identifiers 1

IdentifierTypeStateIssuer
6165508MedicaidMA

Other names 1

  • Dr. Joan Mansfield Other name

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)
Enrolled
Credentials
Doctor of Medicine

NPI Registry JSON

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

{
    "created_epoch": "1150934400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1023054251",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "12 MACKINTOSH LN",
            "city": "LINCOLN",
            "state": "MA",
            "postal_code": "017733204",
            "telephone_number": "781-259-9863",
            "fax_number": "617-732-2451"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 JOSLIN PLACE",
            "address_2": "JOSLIN DIABETES CENTER",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "02215",
            "telephone_number": "617-732-2603"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MANSFIELD",
        "first_name": "MARION",
        "middle_name": "JOAN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-06-22",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080A0000X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Adolescent Medicine",
            "state": "MA",
            "license": "44627",
            "primary": false
        },
        {
            "code": "2080P0205X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Endocrinology",
            "state": "MA",
            "license": "44627",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "6165508",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "JOAN",
            "last_name": "MANSFIELD",
            "prefix": "DR.",
            "credential": "MD",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

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 Sep 11, 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.