Margaret Slaven, PSY.D.
NPI 1477628923 · Clinical Psychologist · Fullerton, CA
Margaret Slaven, PSY.D. is a Clinical Psychologist provider in Fullerton, CA (NPI 1477628923).
Provider details
- NPI number
- 1477628923
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- No
- License
- PSY19346 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
19 yrs 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
- 2006-11-21
- Last updated
- 2025-09-11
Frequently asked questions
- What is Margaret Slaven's NPI number?
- Margaret Slaven's National Provider Identifier (NPI) is 1477628923, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Slaven's specialty?
- Margaret Slaven is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Margaret Slaven located?
- Margaret Slaven's practice location on file with NPPES is 1400 N Harbor Blvd, Fullerton, CA 92835-4126.
- What is Margaret Slaven's phone number?
- The practice phone number listed in the NPPES registry for Margaret Slaven is (714) 681-9070.
- Is Margaret Slaven's NPI active?
- Yes — Margaret Slaven's NPI (1477628923) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.