Provider Profile
Mariela M. Costello, PsyD is a psychologist — clinical practicing in Los Altos, CA. Mariela is also listed as specializing in psychologist. This provider record is associated with NPI 1801145727.
Factual summary compiled by Guide.md from public records; not written by this provider.
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
919 FREMONT AVE SUITE 202
Los Altos, CA 95020
Mariela M. Costello is a psychologist in Los Altos, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychologist — Clinical”.
NPI registry
Mariela M. Costello is listed at 919 Fremont Ave Suite 202, Los Altos, CA 95020. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
The number on file is (408) 220-3268. Contact the office directly to confirm availability and scheduling.
NPI registry
Mariela M. Costello's National Provider Identifier is 1801145727. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Mariela M. Costello has 14+ years experience. Registered with an NPI since 2012. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Not yet. This profile is built from public federal data and has not been confirmed by Mariela M. Costello. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.