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Alison Nathan, PHD
NPI 1659478204 · Clinical Psychologist · Fullerton, CA
Alison Nathan, PHD is a Clinical Psychologist provider in Fullerton, CA (NPI 1659478204).
Provider details
- NPI number
- 1659478204
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY7777 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 index)
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
680 Langsdorf Dr
# 219
Fullerton, CA 92831-3702
Phone: (714) 871-9732
Fax: (714) 871-4561
Street-level locationGet directions
Mailing address
680 Langsdorf Dr
Fullerton, CA 92831-3702
Registry dates
- Enumerated
- 2006-09-17
- Last updated
- 2011-10-21
Frequently asked questions
- What is Alison Nathan's NPI number?
- Alison Nathan's National Provider Identifier (NPI) is 1659478204, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alison Nathan's specialty?
- Alison Nathan is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Alison Nathan located?
- Alison Nathan's practice location on file with NPPES is 680 Langsdorf Dr, Fullerton, CA 92831-3702.
- What is Alison Nathan's phone number?
- The practice phone number listed in the NPPES registry for Alison Nathan is (714) 871-9732.
- Is Alison Nathan's NPI active?
- Yes — Alison Nathan's NPI (1659478204) is active in the NPPES registry as of the last update on 2011-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.