Sebastien Castelain
NPI 1407207038 · Adult Psychiatric/Mental Health Registered Nurse · San Mateo, CA
Sebastien Castelain is a Adult Psychiatric/Mental Health Registered Nurse provider in San Mateo, CA (NPI 1407207038).
Provider details
- NPI number
- 1407207038
- Entity type
- Individual
- Primary specialty
- Adult Psychiatric/Mental Health Registered NurseNursing Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 95082750 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 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
- 2016-06-24
- Last updated
- 2026-02-18
- Certified
- 2026-02-18
Frequently asked questions
- What is Sebastien Castelain's NPI number?
- Sebastien Castelain's National Provider Identifier (NPI) is 1407207038, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sebastien Castelain's specialty?
- Sebastien Castelain is listed in the NPPES registry with a primary specialty of Adult Psychiatric/Mental Health Registered Nurse (Nursing Service Providers).
- Where is Sebastien Castelain located?
- Sebastien Castelain's practice location on file with NPPES is 1700 S Amphlett Blvd Ste 120, San Mateo, CA 94402-2711.
- What is Sebastien Castelain's phone number?
- The practice phone number listed in the NPPES registry for Sebastien Castelain is (650) 683-0971.
- Is Sebastien Castelain's NPI active?
- Yes — Sebastien Castelain's NPI (1407207038) is active in the NPPES registry as of the last update on 2026-02-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.