Sebastien Joseph, PA-S
NPI 1649120478 · Physician Assistant · Westfield, MA
Sebastien Joseph, PA-S is a Physician Assistant provider in Westfield, MA (NPI 1649120478).
Provider details
- NPI number
- 1649120478
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-S
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
83% 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
- 2026-01-31
- Last updated
- 2026-01-31
- Certified
- 2026-01-31
Frequently asked questions
- What is Sebastien Joseph's NPI number?
- Sebastien Joseph's National Provider Identifier (NPI) is 1649120478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sebastien Joseph's specialty?
- Sebastien Joseph is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sebastien Joseph located?
- Sebastien Joseph's practice location on file with NPPES is 577 Western Ave, Westfield, MA 01085-2580.
- What is Sebastien Joseph's phone number?
- The practice phone number listed in the NPPES registry for Sebastien Joseph is (413) 572-8149.
- Is Sebastien Joseph's NPI active?
- Yes — Sebastien Joseph's NPI (1649120478) is active in the NPPES registry as of the last update on 2026-01-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.