Claire Sebastian, LCSW
NPI 1861927550 · Clinical Social Worker · Corte Madera, CA
Claire Sebastian, LCSW is a Clinical Social Worker provider in Corte Madera, CA (NPI 1861927550).
Provider details
- NPI number
- 1861927550
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- LCSW73493 (CA)
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
9 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
- 2017-05-01
- Last updated
- 2022-07-21
Frequently asked questions
- What is Claire Sebastian's NPI number?
- Claire Sebastian's National Provider Identifier (NPI) is 1861927550, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Claire Sebastian's specialty?
- Claire Sebastian is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Claire Sebastian located?
- Claire Sebastian's practice location on file with NPPES is 200 Tamal Plz Ste 130, Corte Madera, CA 94925-1195.
- What is Claire Sebastian's phone number?
- The practice phone number listed in the NPPES registry for Claire Sebastian is (415) 529-6560.
- Is Claire Sebastian's NPI active?
- Yes — Claire Sebastian's NPI (1861927550) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.