Mert Rusen Gulsen, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

3018538 Issued in MA

Practice address

330 Mount Auburn St
Cambridge, MA 02138-5597

Phone

(646) 591-3823

NPI assigned

Apr 28, 2025

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

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

Credentials

Doctor of Medicine

Interoperability endpoints

• Direct secure messaging: mgulsen567556@direct.bilh.masshiway.net

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

{
    "created_epoch": "1745798400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1745798400000",
    "number": "1255129649",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "620 W 170TH ST APT 2H",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100323530",
            "telephone_number": "646-591-3823"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "330 MOUNT AUBURN ST",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021385597",
            "telephone_number": "646-591-3823"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GULSEN",
        "first_name": "MERT RUSEN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-04-28",
        "last_updated": "2025-04-28",
        "certification_date": "2025-04-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "3018538",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Richard Guerriero, RPH
• Amy L Gui, LICSW
• Thomas Guiney, DMD
• Gulsun Gul, DDS,MBA,MPH,MS
• Sanjay Gulati, MD
• Bethany Gunnet
• Geetika Gupta, MD
• Gopal K Gupta, MD
• Laura Ann Gurevich, PH.D.
• Victor Gurewich, M.D.

• Internal Medicine Physician in Cambridge, MA
• Providers in Cambridge, 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 Apr 28, 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.