NPIMap

Individual provider Active NPI

Mahmoud Fathi Mahmoud Abd Nassar, MD

  • Endocrinology, Diabetes & Metabolism Physician
  • Burlington, VT
National Provider Identifier
1548882137
Registry record updated Aug 8, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X
License
042.0018335 Issued in VT
Practice address
111 Colchester Ave
Burlington, VT 05401-1473
Phone
(802) 847-0000
NPI assigned
May 18, 2020
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 8, 2025

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

Specialties & licenses 5

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 334582-01 NY
Internal Medicine Physician 207R00000X 042.0018335 VT
Endocrinology, Diabetes & Metabolism Physician 207RE0101X 334582 NY
Student in an Organized Health Care Education/Training Program 390200000X
Endocrinology, Diabetes & Metabolism Physician 207RE0101X 042.0018335 VT Primary

Addresses

Primary practice location

111 Colchester Ave
Burlington, VT 05401-1473

Mailing address

111 Colchester Ave
Burlington, VT 05401-1473
Phone (802) 847-0000

Other practice location 1

705 Maple Rd.
Buffalo, NY 14221
Phone (716) 580-7300

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in VT
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
I20250624001973 VT Practitioner - Endocrinology 9032621255 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Endocrinology
Education
Other, 2007
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices

Practice addresses (Care Compare)

111 Colchester Ave
Burlington, VT 05401-1473
Phone (802) 847-0000

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
334582-01NYMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
University of Vermont Medical Center Inc Internal Medicine CurrentSince Jun 12, 2025 Accepting new patients

Locations

111 Colchester Ave
Burlington, VT 05401
Phone (802) 656-2415

1 S Prospect St
Burlington, VT 05401
Phone (802) 847-4531

62 Tilley Dr
Ste 202
South Burlington, VT 05403
Phone (802) 847-4576

Interoperability endpoints

  • Direct secure messaging: mnassar623416@direct.uvmhealth.org

Organizations & group practices 1

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 21

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

View all 21

NPI Registry JSON

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

{
    "created_epoch": "1589760000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754611200000",
    "number": "1548882137",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "111 COLCHESTER AVE",
            "city": "BURLINGTON",
            "state": "VT",
            "postal_code": "054011473",
            "telephone_number": "802-847-0000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "111 COLCHESTER AVE",
            "city": "BURLINGTON",
            "state": "VT",
            "postal_code": "054011473",
            "telephone_number": "802-847-0000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "705 Maple Rd.",
            "address_purpose": "LOCATION",
            "city": "Buffalo",
            "state": "NY",
            "postal_code": "14221",
            "country_code": "US",
            "telephone_number": "716-580-7300",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NASSAR",
        "first_name": "MAHMOUD",
        "middle_name": "FATHI MAHMOUD ABD",
        "name_prefix": "Mr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-05-18",
        "last_updated": "2025-08-08",
        "certification_date": "2025-08-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "334582-01",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "VT",
            "license": "042.0018335",
            "primary": false
        },
        {
            "code": "207RE0101X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": "NY",
            "license": "334582",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207RE0101X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": "VT",
            "license": "042.0018335",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Burlington, VT

Sources for this page

Verify at the official NPI Registry.