Mayssam El Najjar

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

289754 Issued in MA

Practice address

736 Cambridge St
Boston, MA 02135-2907

Phone

(617) 789-3000

NPI assigned

Aug 20, 2021

Sex

Female

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Other identifiers 1

Electronic endpoints 1

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Interoperability endpoints

• Direct secure messaging: melnajjar1372724@direct.hopkinsmedicine.org

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

{
    "created_epoch": "1629417600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750809600000",
    "number": "1821764622",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "707 PRESIDENT ST APT 1614",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212024553"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "736 CAMBRIDGE ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021352907",
            "telephone_number": "617-789-3000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4940 Eastern Ave",
            "address_purpose": "LOCATION",
            "city": "Baltimore",
            "state": "MD",
            "postal_code": "212242735",
            "country_code": "US",
            "telephone_number": "410-550-0100",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "EL NAJJAR",
        "first_name": "MAYSSAM",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2021-08-20",
        "last_updated": "2025-06-25",
        "certification_date": "2025-06-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "MA",
            "license": "289754",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "289754",
            "primary": true
        },
        {
            "code": "101Y00000X",
            "taxonomy_group": "",
            "desc": "Counselor",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "236",
            "state": "MA"
        }
    ],
    "endpoints": [
        {
            "endpointType": "CONNECT",
            "endpointTypeDescription": "CONNECT URL",
            "endpoint": "mysteward.org",
            "affiliation": "N",
            "address_1": "736 Cambridge St",
            "city": "Boston",
            "state": "MA",
            "country_code": "US",
            "postal_code": "021352907",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Rachelle El Helou, MD
• Joseph El Khalil, MD
• Kristen El Khattabi, LICSW
• Tracy El Khoury, MD
• Aimen El Manafi, M.D.
• Hala Emile El Rami, MD
• Nuha A El Sayed, M.D.
• Nicola El Tom
• Ahmed Y El-Araby, MD
• Amr El-Bokl

• Internal Medicine Physician in Boston, MA
• Providers in Boston, MA by specialty
• Internal Medicine Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 25, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.