Thomas James Hagan, D.C.

Primary specialty

ChiropractorTaxonomy code 111N00000X

License

2866 Issued in MA

Practice address

1718 Massachusetts Ave
Cambridge, MA 02138-1804

Phone

(617) 492-5438

Fax

(617) 868-4611

NPI assigned

Jul 1, 2005

Last updated

Jul 13, 2026By the provider in NPPES

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

Enrollment records 1

Specialty

Chiropractic

Education

New York Chiropractic College, 2003

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Khalsa Chiropractic Office P.C.Group PAC ID 1456416882, 4 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Khalsa Chiropractic Office P.C.

  • Chiropractor
  • Cambridge, MA
  • NPI 1952430589
  Medicare reassignment Care Compare group NPD
• Sports Group Physical Therapy

  • Physical Therapy Clinic/Center
  • Cambridge, MA
  • NPI 1316395361
  NPD (past) Authorized official
• Khalsa Chiropractic Back Bay, Inc

  • Chiropractor
  • Boston, MA
  • NPI 1003354978
  NPD

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

{
    "created_epoch": "1120176000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1245237569",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1718 MASSACHUSETTS AVE",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021381804",
            "telephone_number": "617-492-5438",
            "fax_number": "617-868-4611"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1718 MASSACHUSETTS AVE",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021381804",
            "telephone_number": "617-492-5438",
            "fax_number": "617-868-4611"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAGAN",
        "first_name": "THOMAS",
        "middle_name": "JAMES",
        "name_prefix": "Dr.",
        "credential": "D.C.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-01",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "111N00000X",
            "taxonomy_group": "",
            "desc": "Chiropractor",
            "state": "MA",
            "license": "2866",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sara Haddadi
• Karen Haessler, PA-C
• Rose Haferd
• Rachel Freda Haft, MD
• Gregory N Hagan, MD
• Ziakeya Haggerty
• Fanah Hagos
• Chelsea Hahm
• Meaza Hailemichael
• Frederick Haines, LMHC

• Chiropractor in Cambridge, MA
• Providers in Cambridge, MA by specialty
• Chiropractor in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.