Cem Simsek, MD

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

5001571 Issued in MA

Practice address

75 Francis St
Boston, MA 02115-6110

Phone

(857) 282-5142

NPI assigned

Dec 17, 2020

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

Not listed in the public Medicare enrollment file

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.

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1608163200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786665600000",
    "number": "1932795408",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "20 2ND AVE APT 319",
            "city": "BURLINGTON",
            "state": "MA",
            "postal_code": "018034456",
            "telephone_number": "443-467-5545"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156110",
            "telephone_number": "857-282-5142"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIMSEK",
        "first_name": "CEM",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-12-17",
        "last_updated": "2026-08-14",
        "certification_date": "2026-08-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "MA",
            "license": "5001571",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sarah E. Simpson, PA-C
• Fnu Simran, MD
• Alexandra Sims, FNP
• John R Sims, MD
• Katherine Bustin Sims, MD
• Erika Christian Simshauser, CNP
• Ekin Simwatachela, MBCHB
• Mallory Sin, LDN, RD
• Claire Elizabeth Sinai, DNP
• Ana Sinauridze

• Gastroenterology Physician in Boston, MA
• Providers in Boston, MA by specialty
• Gastroenterology Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 14, 2026; 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.