Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mr. Sebastien Michel Castelain

Individual provider Adult Psychiatric/Mental Health Registered Nurse · NPI 1407207038

Mr. Sebastien Michel Castelain is an Adult Psychiatric/Mental Health Registered Nurse in San Mateo, California. Licensed in California. Registered with an NPI since 2016.

Licensed in
CA
In the registry since
2016

Practice location Address checks out

1700 S Amphlett Blvd Ste 120
San Mateo, CA 94402-2711
Phone: (650) 683-0971
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Adult Psychiatric/Mental Health Registered Nurse (primary) Taxonomy 163WP0809X · Licence 95082750 (CA)

Record details

NPI number1407207038
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJune 24, 2016
Last updated in NPPESFebruary 18, 2026
Certification dateFebruary 18, 2026

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