Clare M Horkan, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

238712 Issued in MA

Practice address

75 Francis St
Boston, MA 02115-6106

Phone

(617) 732-5500

NPI assigned

Feb 4, 2009

Last updated

Oct 13, 2026By the provider in NPPES

Sex

Female

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

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

Internal MedicineAlso: Hospitalist

Education

Other, 1999

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: horkan.clare.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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Brigham & Womens Physicians Organization Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1033535497
  Medicare reassignment Care Compare group
• Brigham and Women's Hospital

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1093885816
  NPD
• Brigham & Womens Hospital, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1790717650
  NPD (past)
• Brigham and Women's Faulkner Hospital Inc

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1578677811
  NPD (past)

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

  • Psychiatric Hospital Unit
  • Boston, MA
  • NPI 1033121025
  Care Compare affiliation
• Brigham and Women's Faulkner Hospital Inc

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1578677811
  Care Compare affiliation

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

{
    "created_epoch": "1233705600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1791849600000",
    "number": "1982842514",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "65 GOODNOUGH RD",
            "city": "CHESTNUT HILL",
            "state": "MA",
            "postal_code": "024673140",
            "telephone_number": "617-667-7000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "75 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156106",
            "telephone_number": "617-732-5500"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "330 Brookline Ave",
            "address_purpose": "LOCATION",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022155400",
            "country_code": "US",
            "telephone_number": "617-667-7000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HORKAN",
        "first_name": "CLARE",
        "middle_name": "M",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2009-02-04",
        "last_updated": "2026-10-13",
        "certification_date": "2026-10-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "238712",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Arielle S Horenstein, PHD
• Edward Aloysius Horgan III, P.A.
• Maryellen Horgan, P.A.
• Anne Celeste Horigan
• Henry Matthew Horita, MD
• Maximilian Alexander Horlbeck
• Amanda Nicole Horn
• Dwan C Horn, RD, LDN, CNSC
• Thomas Dag Horn, MD
• Leigh Horne-Mebel, LICSW

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

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