Provider Profile
Caitlin O'Brien-Masonis, PsyD
Unclaimed ProfileAbout Dr. O'brien-Masonis
No biography has been added yet. Is this you? Claim this profile to add one.
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (805) 468-2000
- Email not available
Practice Locations
10333 EL CAMINO REAL
Atascadero, CA 93422
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other psychologists at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
What is Caitlin O'Brien-Masonis's specialty?
Caitlin O'Brien-Masonis is a psychologist in Atascadero, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychologist — Clinical”.
NPI registry
Where can I find Caitlin O'Brien-Masonis?
Caitlin O'Brien-Masonis is listed at 10333 El Camino Real, Atascadero, CA 93422. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Caitlin O'Brien-Masonis?
The number on file is (805) 468-2000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Caitlin O'Brien-Masonis's NPI number?
Caitlin O'Brien-Masonis's National Provider Identifier is 1508679846. 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
How long has Caitlin O'Brien-Masonis been practicing?
Caitlin O'Brien-Masonis has 1+ years experience. Registered with an NPI since 2025. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Caitlin O'Brien-Masonis confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Caitlin O'Brien-Masonis. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.