Tamsyn Withers

Primary specialty

Certified Registered Nurse AnesthetistTaxonomy code 367500000X

License

RN2318517 Issued in MA

Practice address

55 Fruit St
Boston, MA 02114-2696

Phone

(617) 726-3030

NPI assigned

Mar 12, 2025

Last updated

Jun 28, 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 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Specialty

Certified Registered Nurse Anesthetist (Crna)

Education

Other, 2026

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

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

{
    "created_epoch": "1741737600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782604800000",
    "number": "1306645122",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "12 WATERFALL DR APT F",
            "city": "CANTON",
            "state": "MA",
            "postal_code": "020214161",
            "telephone_number": "508-298-2940"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 FRUIT ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021142696",
            "telephone_number": "617-726-3030"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-8210",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WITHERS",
        "first_name": "TAMSYN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2025-03-12",
        "last_updated": "2026-06-28",
        "certification_date": "2026-06-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "MA",
            "license": "RN2318517",
            "primary": false
        },
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MA",
            "license": "RN2318517",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Victoria Witczak, PA-C
• Margaret Embury Witek, CRNA
• Sara Witek, AU.D
• Lisa Witham, CRNA
• Thomas Patrick Witherby
• Withings Medical Group Ca PC
• Withings Medical Group KS PA
• Withings Medical Group NJ PA
• Withings Medical Group PA
• Susan M Witkie, M.D.

• Certified Registered Nurse Anesthetist in Boston, MA
• Providers in Boston, MA by specialty
• Certified Registered Nurse Anesthetist in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 28, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• 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.