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Darrell Christian, PH.D.
NPI 1023031564 · Psychologist · Walnut Creek, CA
Darrell Christian, PH.D. is a Psychologist provider in Walnut Creek, CA (NPI 1023031564).
Provider details
- NPI number
- 1023031564
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY11699 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(91/100 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
2950 Camino Diablo
Suite 120
Walnut Creek, CA 94597-3978
Phone: (925) 935-8646
Fax: (925) 935-8646
Street-level locationGet directions
Mailing address
2950 Camino Diablo
Walnut Creek, CA 94597-3978
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2007-09-21
Frequently asked questions
- What is Darrell Christian's NPI number?
- Darrell Christian's National Provider Identifier (NPI) is 1023031564, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darrell Christian's specialty?
- Darrell Christian is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Darrell Christian located?
- Darrell Christian's practice location on file with NPPES is 2950 Camino Diablo, Walnut Creek, CA 94597-3978.
- What is Darrell Christian's phone number?
- The practice phone number listed in the NPPES registry for Darrell Christian is (925) 935-8646.
- Is Darrell Christian's NPI active?
- Yes — Darrell Christian's NPI (1023031564) is active in the NPPES registry as of the last update on 2007-09-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.