Siobhan Baxter

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA100782 Issued in MA

Practice address

200 High St FL 5
Boston, MA 02110-3036

Phone

(617) 221-6909

NPI assigned

Apr 4, 2024

Last updated

Aug 10, 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: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Physician Assistant

Education

Other, 2024

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Pratt Surgical Associates IncGroup PAC ID 4486546082, 44 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Tufts Medical Center Hospital, Boston, MA, CCN 220116
• Melrosewakefield Healthcare Hospital, Melrose, MA, CCN 220070

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

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.

• Pratt Surgical Associates Inc

  dba Pratt Associates

  • Surgery Physician
  • Boston, MA
  • NPI 1912944182
  Medicare reassignment Care Compare group
• Hadlock Center for Facial Plastic Surgery PC

  • Facial Plastic Surgery Physician
  • Boston, MA
  • NPI 1104507854
  NPD

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

• Melrosewakefield Healthcare, Inc.

  • General Acute Care Hospital
  • Medford, MA
  • NPI 1841290467
  Care Compare affiliation
• Tufts Medical Center, Inc.

  dba Tufts Medical Center

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1730132515
  Care Compare affiliation

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

{
    "created_epoch": "1712188800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786320000000",
    "number": "1679325310",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2 MALLARD LN",
            "city": "NORTH READING",
            "state": "MA",
            "postal_code": "018642169",
            "telephone_number": "781-315-3008"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 HIGH ST FL 5",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021103036",
            "telephone_number": "617-221-6909"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BAXTER",
        "first_name": "SIOBHAN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-04-04",
        "last_updated": "2026-08-10",
        "certification_date": "2026-08-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "MA",
            "license": "PA100782",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Granville Lake Baxa, MD
• Sachin Niranjan Baxi, M.D.
• Abigail Lauren Baxter, PA-C
• Allyson Baxter, NP
• Ryan Scott Baxter, RN
• Bay Cove Human Services
• Bay Cove Human Services
• Bay Cove Human Services
• Bay Cove Human Services, Inc
• Bay Cove Human Services, Inc

• Physician Assistant in Boston, MA
• Providers in Boston, MA by specialty
• Physician Assistant in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 10, 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.