Tamsyn Withers
- Affiliated sites
- 2
- Medical groups
- 3
- State license
- 1
- Year NPI issued
- 2025
- Practice locations
- 2
- Practice address
- 148 Chestnut St, Needham, MA 02492
- Practice phone
- Call (781) 280-1500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mass General Physicians Organization - Needham
Primary care practice · Needham, Massachusetts
Find Tamsyn Withers' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Tamsyn Withers is a nurse anesthetist in Boston, Massachusetts
Tamsyn Withers practices at Mass General Physicians Organization - Needham in Needham, Massachusetts.
Tamsyn Withers' NPI, 1306645122, was assigned on March 12, 2025. Tamsyn Withers holds Massachusetts license RN2318517.
- NPI
- 1306645122NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496219461
- NPI enumeration date
- March 12, 2025
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (781) 280-1500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Tamsyn Withers practices in Needham and Boston
Tamsyn Withers' primary practice is Mass General Physicians Organization - Needham, at 148 Chestnut St, Needham, MA 02492. The practice phone is (781) 280-1500. The NPI Registry lists Tamsyn Withers' practice address as 55 Fruit St, Boston, MA 02114.
- Mass General Physicians Organization - NeedhamPrimary148 Chestnut St, Needham, MA 02492Phone(781) 280-1500
- NPI Registry address55 Fruit St, Boston, MA 02114Phone(617) 726-3030
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Tamsyn Withers is affiliated with 2 sites of care and 3 medical groups
Tamsyn Withers' primary practice is Mass General Physicians Organization - Needham in Needham, Massachusetts. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Tamsyn Withers to 2 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Tamsyn Withers' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tamsyn Withers practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mass General Physicians Organization - Needham | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Tamsyn Withers is one of 1,027 nurse anesthetists in Massachusetts
Nurse anesthetist, certified registered is Tamsyn Withers' primary specialty in the NPI Registry, under taxonomy code 367500000X. Tamsyn Withers is licensed in Massachusetts.
Specialties and state licenses
- Certified registered nurse anesthetist, MassachusettsPrimary
Nurse anesthetists near Tamsyn Withers
Counts of nurse anesthetists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
How Tamsyn Withers takes part in Medicare
Tamsyn Withers accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Tamsyn Withers's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Tamsyn Withers
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Tamsyn Withers' NPI number?
Tamsyn Withers' NPI number is 1306645122. It was assigned on March 12, 2025, and it is active in the NPI Registry.
What does Tamsyn Withers specialize in?
Tamsyn Withers is a nurse anesthetist in Boston, Massachusetts. The primary specialty in the NPI Registry is Certified Registered Nurse Anesthetist (taxonomy code 367500000X).
Where does Tamsyn Withers practice?
Tamsyn Withers practices at 148 Chestnut St, Needham, MA 02492. Tamsyn Withers also practices at 55 Fruit St, Boston, MA 02114. Tamsyn Withers' primary practice is Mass General Physicians Organization - Needham in Needham, Massachusetts. Dmand AI also links Tamsyn Withers to 2 medical groups and 1 group practice or clinic.
What is Tamsyn Withers' office phone number?
The practice phone on file for Tamsyn Withers is (781) 280-1500.
What is Tamsyn Withers' medical license number?
Tamsyn Withers holds Massachusetts license RN2318517.
What medical group is Tamsyn Withers part of?
Tamsyn Withers is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Tamsyn Withers to 2 more medical groups.
Does Tamsyn Withers accept Medicare?
Yes. CMS lists Tamsyn Withers as accepting Medicare assignment.
How long has Tamsyn Withers been practicing?
Tamsyn Withers' NPI was assigned in 2025.
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