Justin Sean Gillis LLC
NPI 1023642253 · Clinical Social Worker · Belmont, MA
Justin Sean Gillis LLC is a Clinical Social Worker organization in Belmont, MA (NPI 1023642253).
Provider details
- NPI number
- 1023642253
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Justin Gillis, Owner(774) 273-0594
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 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
- 2020-02-26
- Last updated
- 2020-02-26
- Certified
- 2020-02-26
Frequently asked questions
- What is Justin Sean Gillis LLC's NPI number?
- Justin Sean Gillis LLC's National Provider Identifier (NPI) is 1023642253, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Justin Sean Gillis LLC?
- Justin Sean Gillis LLC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Justin Sean Gillis LLC located?
- Justin Sean Gillis LLC's practice location on file with NPPES is 115 Mill St, Belmont, MA 02478-1064.
- What is Justin Sean Gillis LLC's phone number?
- The practice phone number listed in the NPPES registry for Justin Sean Gillis LLC is (617) 855-2459.
- Who is the authorized official for Justin Sean Gillis LLC?
- The authorized official listed on Justin Sean Gillis LLC's NPPES record is Justin Gillis, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Justin Sean Gillis LLC's NPI active?
- Yes — Justin Sean Gillis LLC's NPI (1023642253) is active in the NPPES registry as of the last update on 2020-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.