Sarah Elizabeth Shannahan, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

259668 Issued in MA

Practice address

330 Brookline Ave
Boston, MA 02215-5400

Phone

(617) 667-7000

NPI assigned

Jun 2, 2014

Last updated

Feb 24, 2025By 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 2

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

GastroenterologyAlso: Internal Medicine

Education

University of Massachusetts Medical School, 2014

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Gbgastro LLCGroup PAC ID 4587909288, 22 clinicians

Greater Boston GastroenterologyGroup PAC ID 5991789802, 20 clinicians

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

Practice addresses (Care Compare)

Hospital & facility affiliations

• Metrowest Medical Center Hospital, Framingham, MA, CCN 220175
• Brigham and Women's Hospital Hospital, Boston, MA, CCN 220110
• Newton-Wellesley Hospital Hospital, Newton, MA, CCN 220101
• Umass Memorial Medical Center/University Campus Hospital, Worcester, MA, CCN 220163
• Milford Regional Medical Center Hospital, Milford, MA, CCN 220090

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: sarahshannahan@gbg.allscriptsdirect.net
• Direct secure messaging: shannahan.sarah.bwh@direct.partners.masshiway.net
• Direct secure messaging: sshannahan451151@direct.bilh.masshiway.net
• Direct secure messaging: sshannahan89353@tuftsmedicine.direct-ci.com

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 NPD
• Gbgastro LLC

  • Gastroenterology Physician
  • Framingham, MA
  • NPI 1033693023
  Medicare reassignment Care Compare group NPD
• Greater Boston Gastroenterology

  • Gastroenterology Physician
  • Framingham, MA
  • NPI 1164498796
  Medicare reassignment Care Compare group NPD
• Associated Physicians of Harvard Medical Faculty Physicians at Beth Is

  dba Medicine - APHMFP at BIDMC Inc.

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1497151773
  Medicare reassignment NPD
• Beth Israel Deaconess Medical Center, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1548202641
  Medicare reassignment NPD
• Cambridge Public Health Commission

  dba Cambridge Health Alliance

  • General Acute Care Hospital
  • Cambridge, MA
  • NPI 1932313228
  Medicare reassignment NPD
• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1194765438
  Medicare reassignment NPD
• Associated Physicians of Harvard Medical Faculty Physicians at Beth Is

  dba Associated Physicians of HMFP

  • Multi-Specialty Clinic/Center
  • Boston, MA
  • NPI 1861216038
  NPD
• Beth Israel Deaconess Medical Center, Inc.

  • Ambulance
  • Boston, MA
  • NPI 1518600501
  NPD
• Brigham and Women's Hospital

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1093885816
  NPD
• Cambridge Public Health Commission

  dba Cambridge Health Alliance

  • General Acute Care Hospital
  • Cambridge, MA
  • NPI 1487603585
  NPD
• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

  dba Emergency Medicine - HMFP at BIDMC

  • Emergency Medicine Physician
  • Boston, MA
  • NPI 1316987993
  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
• Newton-Wellesley Hospital

  • General Acute Care Hospital
  • Newton, MA
  • NPI 1992737761
  Care Compare affiliation
• 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
• VHS Acquisition Subsidiary Number 9 Inc

  dba MetroWest Medical Center

  • 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": "1401667200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1740355200000",
    "number": "1528470143",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "330 BROOKLINE AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022155400",
            "telephone_number": "617-667-7000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "330 BROOKLINE AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022155400",
            "telephone_number": "617-667-7000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SHANNAHAN",
        "first_name": "SARAH",
        "middle_name": "ELIZABETH",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-06-02",
        "last_updated": "2025-02-24",
        "certification_date": "2025-02-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "259668",
            "primary": true
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "MA",
            "license": "269875",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ganesh M Shankar, MD, PHD
• Kalpana N. Shankar, MD
• Puja Shankar
• Sravya Bharathi Shankara, MD
• Vignesh Shanmugam, M.D.
• Emily Kathryn Shanno, PA-C
• Shannon Lynch Psychotherapy
• Shannon Psychiatry
• Chelsea Lee Shannon, MD
• David Michael Shannon, 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 Feb 24, 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.