Luke Michael Messac, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

291239 Issued in MA

Practice address

75 Francis St
Boston, MA 02115-6110

Phone

(617) 732-5500

NPI assigned

May 31, 2018

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in MA, TX2 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 2

Specialty

Emergency Medicine

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Brigham and Womens Physicians Organization IncGroup PAC ID 3870405988, 2,931 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Brigham and Women's Hospital Hospital, Boston, MA, CCN 220110
• Brigham and Women Faulkner Hospital Hospital, Jamaica Plain, MA, CCN 220119
• Fort Defiance Indian Hospital Hospital, Ft. Defiance, AZ, CCN 030071

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: messac.luke.bwh@direct.partners.masshiway.net

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.

• Brigham & Womens Physicians Organization Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1033535497

  Single Specialty

  Medicare reassignment Care Compare group NPD
• Mass General Brigham Medical Group Western Massachusetts Inc

  • Family Medicine Physician
  • Northampton, MA
  • NPI 1295787919

  Single Specialty

  Medicare reassignment NPD
• The Fort Defiance Indian Hospital Board, Incorporation

  dba Fort Defiance Indian Hospital

  • General Acute Care Hospital
  • Fort Defiance, AZ
  • NPI 1477876639

  Single Specialty, TX

  Medicare reassignment NPD
• Brigham and Women's Hospital

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1093885816
  NPD

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

• Brigham & Womens Hospital, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1790717650
  Care Compare affiliation
• Brigham and Women's Faulkner Hospital, Inc

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1578677811
  Care Compare affiliation
• Brigham and Women's Faulkner Hospital, Inc.

  • Psychiatric Hospital Unit
  • Boston, MA
  • NPI 1033121025
  Care Compare affiliation

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

{
    "created_epoch": "1527724800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1743465600000",
    "number": "1679065197",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156110",
            "telephone_number": "617-732-5500"
        },
        {
            "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": "Corner of Route N12 and N7",
            "address_purpose": "LOCATION",
            "city": "Fort Defiance",
            "state": "AZ",
            "postal_code": "865040649",
            "country_code": "US",
            "telephone_number": "928-729-8000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MESSAC",
        "first_name": "LUKE",
        "middle_name": "MICHAEL",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2018-05-31",
        "last_updated": "2025-04-01",
        "certification_date": "2025-03-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Emergency Medicine",
            "state": "RI",
            "license": "LP04303",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "MA",
            "license": "291239",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Sarah Meskal, MD
• Judy Mesle, LICSW
• Kira Mesman-Hallman, PA-C
• Linda Mesnik
• Mary Louise Mesquita, PH.D.
• Evangelos Messaris, M.D., PH.D
• Kristin P Messer, N.P.
• Brandon Henry Messick, DO
• Justin R Messina, DMD
• Chelsea Jordan Messinger, MD, PHD

• Emergency Medicine Physician in Boston, MA
• Providers in Boston, MA by specialty
• Emergency Medicine Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 1, 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.
• 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.