Dianne Defreece, PSY.D.
NPI 1255431821 · Clinical Psychologist · Lancaster, CA
Dianne Defreece, PSY.D. is a Clinical Psychologist provider in Lancaster, CA (NPI 1255431821).
Provider details
- NPI number
- 1255431821
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY16949 (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
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
- 2006-09-24
- Last updated
- 2015-12-03
Frequently asked questions
- What is Dianne Defreece's NPI number?
- Dianne Defreece's National Provider Identifier (NPI) is 1255431821, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dianne Defreece's specialty?
- Dianne Defreece is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Dianne Defreece located?
- Dianne Defreece's practice location on file with NPPES is 1345 W Lancaster Blvd, Lancaster, CA 93534-2253.
- What is Dianne Defreece's phone number?
- The practice phone number listed in the NPPES registry for Dianne Defreece is (661) 948-7990.
- Is Dianne Defreece's NPI active?
- Yes — Dianne Defreece's NPI (1255431821) is active in the NPPES registry as of the last update on 2015-12-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.