Sebastian Mcwilliams, MD
NPI 1467740050 · Diagnostic Radiology Physician · Boston, MA
Enrolled with Medicare as Order and Referring Only - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sebastian Mcwilliams, MD is a Diagnostic Radiology Physician provider in Boston, MA (NPI 1467740050).
Provider details
- NPI number
- 1467740050
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2016006387 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-07-15
- Last updated
- 2017-08-02
Frequently asked questions
- What is Sebastian Mcwilliams's NPI number?
- Sebastian Mcwilliams's National Provider Identifier (NPI) is 1467740050, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sebastian Mcwilliams's specialty?
- Sebastian Mcwilliams is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Sebastian Mcwilliams located?
- Sebastian Mcwilliams's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Sebastian Mcwilliams's phone number?
- The practice phone number listed in the NPPES registry for Sebastian Mcwilliams is (617) 724-5246.
- Does Sebastian Mcwilliams accept Medicare?
- Sebastian Mcwilliams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sebastian Mcwilliams's NPI active?
- Yes — Sebastian Mcwilliams's NPI (1467740050) is active in the NPPES registry as of the last update on 2017-08-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.