Claire Brennan, LCSW
NPI 1154600666 · Clinical Social Worker · Newton, MA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Claire Brennan, LCSW is a Clinical Social Worker provider in Newton, MA (NPI 1154600666).
Provider details
- NPI number
- 1154600666
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Clinical Social Worker1041C0700X
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
14 yrs in NPPES 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
- 2011-08-15
- Last updated
- 2023-06-01
- Certified
- 2023-06-01
Frequently asked questions
- What is Claire Brennan's NPI number?
- Claire Brennan's National Provider Identifier (NPI) is 1154600666, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Claire Brennan's specialty?
- Claire Brennan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Claire Brennan located?
- Claire Brennan's practice location on file with NPPES is 64 Eldredge Street, Newton, MA 02458.
- What is Claire Brennan's phone number?
- The practice phone number listed in the NPPES registry for Claire Brennan is (617) 969-4925.
- Does Claire Brennan accept Medicare?
- Claire Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Claire Brennan's NPI active?
- Yes — Claire Brennan's NPI (1154600666) is active in the NPPES registry as of the last update on 2023-06-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.