Brett Hassan, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

238133 Issued in MA

Practice address

215 West St
Milford, MA 01757-2277

Phone

(508) 478-6366

Fax

(508) 473-2636

NPI assigned

Feb 27, 2007

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

Other identifiers 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

Specialty

Gastroenterology

Education

University of Massachusetts Medical School, 2006

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Milford Gastroenterology Associates IncGroup PAC ID 3870532476, 6 clinicians

Umass Memorial Medical Group IncGroup PAC ID 4284539891, 2,494 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Milford Regional Medical Center Hospital, Milford, MA, CCN 220090
• Umass Memorial Medical Center/University Campus Hospital, Worcester, MA, CCN 220163

Merit-based Incentive Payment System (MIPS)

Final score

75 of 100Reported as group

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Milford Gastroenterology Associates Inc.

  • Gastroenterology Physician
  • Milford, MA
  • NPI 1699885798
  Medicare reassignment Care Compare group NPD
• Umass Memorial Medical Group Inc

  • Internal Medicine Physician
  • Worcester, MA
  • NPI 1760445373
  Medicare reassignment Care Compare group NPD
• Umass Memorial Medical Group, Inc.

  • Urgent Care Clinic/Center
  • Oxford, MA
  • NPI 1982381018
  NPD
• River Valley Infectious Disease Specialists Inc.

  • Infectious Disease Physician
  • Newburyport, MA
  • NPI 1366712002
  NPD (past)

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

• Umass Memorial Health-Milford Regional Medical Center Inc

  • General Acute Care Hospital
  • Milford, MA
  • NPI 1477527497
  Care Compare affiliation
• Umass Memorial Medical Center, Inc.

  • General Acute Care Hospital
  • Worcester, MA
  • NPI 1831151455
  Care Compare affiliation

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

{
    "created_epoch": "1172534400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775088000000",
    "number": "1376679761",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "215 WEST ST",
            "city": "MILFORD",
            "state": "MA",
            "postal_code": "017572277",
            "telephone_number": "508-478-6363",
            "fax_number": "508-473-2636"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "215 WEST ST",
            "city": "MILFORD",
            "state": "MA",
            "postal_code": "017572277",
            "telephone_number": "508-478-6366",
            "fax_number": "508-473-2636"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "55 Lake Ave N",
            "address_purpose": "LOCATION",
            "city": "Worcester",
            "state": "MA",
            "postal_code": "016550002",
            "country_code": "US",
            "telephone_number": "508-334-3068",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "28 Newton St",
            "address_purpose": "LOCATION",
            "city": "Southborough",
            "state": "MA",
            "postal_code": "017721215",
            "country_code": "US",
            "telephone_number": "508-334-3068",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "21 Eastern Ave",
            "address_purpose": "LOCATION",
            "city": "Worcester",
            "state": "MA",
            "postal_code": "016053094",
            "country_code": "US",
            "telephone_number": "508-334-8419",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HASSAN",
        "first_name": "BRETT",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-02-27",
        "last_updated": "2026-04-02",
        "certification_date": "2026-04-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "MA",
            "license": "238133",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "110092623A",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Kate Marie Hartley, BCBA
• Barbara Esther Hartmann
• Colby David Harvey
• Madilyn Grace Harwood
• Kaplan Hasanoglu, PHD
• John F Hatch, MD
• Devi Hausman, M.S.
• Alexander Hawley, PA-C
• Jillian Hayes, LICSW
• Amanda Leigh Haynes

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 2, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.