NPIMap

Individual provider Active NPI

Nathan T Connell, MD, MPH

  • Hematology (Internal Medicine) Physician
  • Boston, MA
National Provider Identifier
1245432467
Registry record updated May 11, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hematology (Internal Medicine) PhysicianTaxonomy code 207RH0000X
License
258434 Issued in MA
Practice address
75 Francis St
Boston, MA 02115-6106
Phone
(617) 732-5190
Fax
(617) 732-5706
NPI assigned
Jun 1, 2007
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 11, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Hematology (Internal Medicine) Physician 207RH0000X 258434 MA Primary
Hematology & Oncology Physician 207RH0003X 258434 MA

Addresses

Primary practice location

75 Francis St
Boston, MA 02115-6106

Mailing address

75 Francis St
Boston, MA 02115-6106
Phone (617) 732-5190

Other practice location 1

55 Fruit St
Boston, MA 02114-2696
Phone (617) 732-5190

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20140822001113 MA Practitioner - Hematology 9638397201 Reassigns benefits to 5 organizations

Care Compare profile

Medicare Care Compare
Specialty
Hematology
Education
University of Miami, LM Miller School of Medicine, 2007
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

75 Francis St
Boston, MA 02115-6110
Phone (617) 732-5500

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Brigham and Women'S Hospital Current Accepting new patients
Dana-Farber Cancer Institute, Inc. CurrentSince Aug 1, 2014 Accepting new patients
Massachusetts General Physicians Organization Inc Internal Medicine CurrentSince Dec 29, 2025 Accepting new patients
Dana-Farber Cancer Institute, Inc. CurrentSince Aug 1, 2014 Accepting new patients
Dana-Farber Cancer Institute, Inc. CurrentSince Aug 1, 2014 Accepting new patients
The General Hospital Corporation CurrentSince Dec 11, 2025 Accepting new patients
Brigham and Womens Physicians Organization Inc Past Accepting new patients

Locations

221 Longwood Ave
Boston, MA 02115
Phone (617) 732-4918

75 Francis St
Boston, MA 02115

75 Francis St
Bldg Sr
Boston, MA 02115

55 Fruit St
Boston, MA 02114

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

450 Brookline Ave
Boston, MA 02215
Phone (508) 478-2061

1153 Centre St
#L1
Jamaica Plain, MA 02130

Interoperability endpoints

  • Direct secure messaging: connell.nathan.bwh@direct.partners.masshiway.net

Organizations & group practices 8

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 6

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": "1180656000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778457600000",
    "number": "1245432467",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156106",
            "telephone_number": "617-732-5190",
            "fax_number": "617-732-5706"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156106",
            "telephone_number": "617-732-5190",
            "fax_number": "617-732-5706"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "55 Fruit St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021142696",
            "country_code": "US",
            "telephone_number": "617-732-5190",
            "fax_number": "617-732-5706",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CONNELL",
        "first_name": "NATHAN",
        "middle_name": "T",
        "credential": "MD, MPH",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-06-01",
        "last_updated": "2026-05-11",
        "certification_date": "2026-05-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology",
            "state": "MA",
            "license": "258434",
            "primary": true
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "MA",
            "license": "258434",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.