Quick answers
- Which hospitals does Tamsyn Withers work at?
- Medicare's official clinician data lists Tamsyn Withers at 2 hospitals: Massachusetts Eye and Ear Infirmary - and Signature Healthcare Brockton Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Tamsyn Withers see patients?
- Medicare's clinician data lists 2 practice locations, including Boston, MA and Brockton, MA. Call before your visit to confirm the address.
- What is Tamsyn Withers's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Tamsyn Withers accept Medicare assignment?
- Yes. Medicare's clinician data says Tamsyn Withers accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Tamsyn Withers?
- (617) 523-7900, as listed in official Medicare / NPI Registry data.
- What is Tamsyn Withers's NPI number?
- 1306645122. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Tamsyn Withers works
Medicare's Facility Affiliation Data lists Tamsyn Withers at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Massachusetts Eye and Ear Infirmary -Boston, MA · Acute Care Hospital · CCN 220075
- Signature Healthcare Brockton HospitalBrockton, MA · Acute Care Hospital · CCN 220052
Practice locations
Addresses where Tamsyn Withers is enrolled with Medicare (CMS data updated 2026-10-02).
- 243 Charles StBoston, MA 02114 (617) 523‑7900
- 680 Centre StBrockton, MA 02302 (508) 941‑7642
Group practices
Medicare enrollment lists Tamsyn Withers as a member of these groups (CMS data updated 2026-10-02).
- Massachusetts Eye and Ear Associates, Inc433 clinicians in the group
- Matrix Anesthesia PC52 clinicians in the group
Specialties
Find other Certified Registered Nurse Anesthetist (CRNA) doctors in Massachusetts →
Other nurse anesthetists in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2026 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306645122 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians