Caitlin O'Brien-Masonis, PSY.D
NPI 1508679846 · Clinical Psychologist · Atascadero, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caitlin O'Brien-Masonis, PSY.D is a Clinical Psychologist provider in Atascadero, CA (NPI 1508679846).
Provider details
- NPI number
- 1508679846
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D
- Sex
- Female
- Sole proprietor
- No
- License
- PSY35616 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr 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
- 2025-01-30
- Last updated
- 2025-02-05
- Certified
- 2025-02-05
Frequently asked questions
- What is Caitlin O'Brien-Masonis's NPI number?
- Caitlin O'Brien-Masonis's National Provider Identifier (NPI) is 1508679846, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caitlin O'Brien-Masonis's specialty?
- Caitlin O'Brien-Masonis is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Caitlin O'Brien-Masonis located?
- Caitlin O'Brien-Masonis's practice location on file with NPPES is 10333 El Camino Real, Atascadero, CA 93422-5808.
- What is Caitlin O'Brien-Masonis's phone number?
- The practice phone number listed in the NPPES registry for Caitlin O'Brien-Masonis is (805) 468-2000.
- Does Caitlin O'Brien-Masonis accept Medicare?
- Caitlin O'Brien-Masonis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caitlin O'Brien-Masonis's NPI active?
- Yes — Caitlin O'Brien-Masonis's NPI (1508679846) is active in the NPPES registry as of the last update on 2025-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.