NPIMap

Individual provider Active NPI

Warren David Backman, MBBS

  • Geriatric Medicine (Internal Medicine) Physician
  • Boston, MA
National Provider Identifier
1174910574
Registry record updated Jun 26, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Geriatric Medicine (Internal Medicine) PhysicianTaxonomy code 207RG0300X
License
282027 Issued in MA
Practice address
55 Fruit St
Boston, MA 02114-2621
Phone
(617) 726-4600
NPI assigned
Apr 23, 2015
Last updated
Jun 26, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 26, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Geriatric Medicine (Internal Medicine) Physician 207RG0300X 282027 MA Primary

Addresses

Primary practice location

55 Fruit St
Boston, MA 02114-2621

Mailing address

165 Cambridge St
Boston, MA 02114-2783

Other practice location 1

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

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
I20200818003893 MA Practitioner - Geriatric MedicinePractitioner - Internal Medicine 9234463878 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Geriatric MedicineAlso: Internal Medicine
Education
Other, 2013
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
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
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
The General Hospital Corporation CurrentSince Jul 13, 2020 Accepting new patients
General Hospital Corp Current Accepting new patients
Massachusetts General Physicians Organization Inc CurrentSince Jul 13, 2020 Accepting new patients
MGH Senior Health PastSince Jul 27, 2020 Accepting new patients

Locations

165 Cambridge St
Boston, MA 02114
Phone (617) 726-4600

55 Fruit St
Boston, MA 02114

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

Interoperability endpoints

  • Direct secure messaging: backman.warren.mgh@direct.partners.masshiway.net

Organizations & group practices 4

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

Hospital & facility affiliations 8

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": "1429747200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782432000000",
    "number": "1174910574",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "165 CAMBRIDGE ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142783"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 FRUIT ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142621",
            "telephone_number": "617-726-4600"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-5500",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BACKMAN",
        "first_name": "WARREN",
        "middle_name": "DAVID",
        "name_prefix": "Dr.",
        "credential": "MBBS",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-04-23",
        "last_updated": "2026-06-26",
        "certification_date": "2026-06-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "MA",
            "license": "282027",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.