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MR. SEBASTIEN MICHEL CASTELAIN
NPI 1407207038
Registered Nurse - Psychiatric/Mental Health, Adult in San Mateo, CA

Active since June 24, 2016
1700 S AMPHLETT BLVD STE 120, SAN MATEO, CA 94402(650) 683-0971 Get Directions Write a Review

NPPES record last updated: February 18, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Mr. Sebastien Michel Castelain NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MR. SEBASTIEN MICHEL CASTELAIN (NPI 1407207038) is an individual psychiatric/mental health, adult provider in San Mateo, California, licensed in California (95082750) and active in the NPI registry since June 2016.

NPPES Registry Identity

NPI1407207038
Entity TypeIndividualMale
Primary Taxonomy163WP0809X
Provider Legal NameMR. SEBASTIEN MICHEL CASTELAIN
Location Address1700 S AMPHLETT BLVD STE 120San Mateo, CA 94402-2711
Mailing Address1700 S Amphlett Blvd Ste 120San Mateo, CA 94402-2711 · (650) 683-0971
Phone(650) 683-0971
Sole ProprietorNo
Enumeration DateJune 24, 2016
Last NPPES UpdateFebruary 18, 2026
NPPES CertifiedFebruary 18, 2026
✔ NPI 1407207038 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRegistered Nurse · Psychiatric/Mental Health, AdultNursing Service Providers
Taxonomy Code163WP0809X
License✔ Licensed in CA · 95082750
1700 S AMPHLETT BLVD STE 120, San Mateo, CA 94402
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HENRY ALLEN MORALES
Day Training/Habilitation Specialist
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (650) 683-2029
MS. ATHENA M. BURNSIDE
Clinic/Center (Adult Mental Health)
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (656) 683-2195
SARAH CHOE LMFT
Marriage & Family Therapist
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (650) 639-6848
MS. MARY CHRISTINA SHEHEE AMFT
Marriage & Family Therapist
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (650) 436-7756
JOSHUA CRAIG HERNANDEZ DAYA
Registered Nurse
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (650) 683-2196
ANNA SHARICE WILEY
Social Worker
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (650) 850-9453
SARAH C PENEGOR RN
Registered Nurse (Psychiatric/Mental Health)
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (650) 683-2422
REBECA ZARAGOZA
Social Worker (Clinical)
1700 S AMPHLETT BLVD STE 120
SAN MATEO, CA 94402
San Mateo County (650) 425-0513

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sebastien Castelain's NPI number?

The NPI number for Sebastien Castelain is 1407207038. It was assigned to this individual provider in the NPPES registry on June 24, 2016.

Where is Sebastien Castelain located?

Sebastien Castelain practices at 1700 S Amphlett Blvd Ste 120, San Mateo, CA 94402. The listed phone number is (650) 683-0971.

What is Sebastien Castelain's specialty?

The primary specialty registered for this NPI is Registered Nurse, specializing in Psychiatric/Mental Health, Adult, with taxonomy code 163WP0809X.

When was this NPI record last updated?

The NPPES record for Sebastien Castelain was last updated on February 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.