Alexander Christakis, M.D.

Primary specialty

Anatomic Pathology & Clinical Pathology PhysicianTaxonomy code 207ZP0102X

License

278394 Issued in MA

Practice address

75 Francis St
Boston, MA 02115-6110

Phone

(617) 732-5500

NPI assigned

Jul 18, 2016

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in MA, RI, CT3 enrollments

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 3

Specialty

Pathology

Education

University of Massachusetts Medical School, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Connecticut Gi PLLCGroup PAC ID 9830110758, 243 clinicians

Metrowest Pathology AssociatesGroup PAC ID 4981745031, 6 clinicians

Gbgastro LLCGroup PAC ID 4587909288, 22 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Metrowest Medical Center Hospital, Framingham, MA, CCN 220175

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.

• Gbgastro LLC

  • Gastroenterology Physician
  • Framingham, MA
  • NPI 1033693023
  Medicare reassignment Care Compare group NPD
• Metrowest Pathology Associates

  • Anatomic Pathology & Clinical Pathology Physician
  • Framingham, MA
  • NPI 1790890077
  Medicare reassignment Care Compare group NPD
• Connecticut Gi PLLC

  • Gastroenterology Physician
  • Hartford, CT
  • NPI 1023124625

  Anatomic Pathology & Clinical Pathology

  Medicare reassignment Care Compare group NPD
• Brigham & Womens Physicians Organization Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1033535497

  Anatomic Pathology & Clinical Pathology

  Medicare reassignment NPD
• University Gastroenterology, LLC

  • Gastroenterology Physician
  • Providence, RI
  • NPI 1386952612
  Medicare reassignment NPD
• Litchfield County Gastroenterology Associates, LLC

  • Gastroenterology Physician
  • Torrington, CT
  • NPI 1871513283
  NPD (past)

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

• VHS Acquisition Subsidiary Number 9 Inc

  • General Acute Care Hospital
  • Framingham, MA
  • NPI 1740252592
  Care Compare affiliation

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

{
    "created_epoch": "1468800000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775088000000",
    "number": "1538512231",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "75 FRANCIS STREET",
            "address_2": "BRIGHAM AND WOMEN'S HOSPITAL",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "02115",
            "telephone_number": "617-732-7510"
        },
        {
            "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": "617-732-5500"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1290 Silas Deane Hwy Ste 101",
            "address_purpose": "LOCATION",
            "city": "Wethersfield",
            "state": "CT",
            "postal_code": "061094337",
            "country_code": "US",
            "telephone_number": "860-859-9061",
            "fax_number": "860-889-6200",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "110 Clock Tower Sq Ste 100",
            "address_purpose": "LOCATION",
            "city": "Portsmouth",
            "state": "RI",
            "postal_code": "028711396",
            "country_code": "US",
            "telephone_number": "401-293-5600",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CHRISTAKIS",
        "first_name": "ALEXANDER",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-07-18",
        "last_updated": "2026-04-02",
        "certification_date": "2026-04-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "MA",
            "license": "278394",
            "primary": true
        },
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "MA",
            "license": "267112",
            "primary": false
        },
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "RI",
            "license": "MD17375",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Guy Chowers, M.D.
• Edwin Choy, MD PHD
• Garry Choy, MD
• Ryan Dennis Edward Chrenek, MD
• Haley Anne Chrisos, PA-C
• Nicholas Alexander Christakis, MD PHD
• Neika Christalin
• Alaia Maria Moniquita Christensen, MD
• Allison Christensen
• Elizabeth Anne Christensen, DPT

• Anatomic Pathology & Clinical Pathology Physician in Boston, MA
• Providers in Boston, MA by specialty
• Anatomic Pathology & Clinical Pathology 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.