Joy Johnson, PSYD
NPI 1962603928 · Clinical Psychologist · Castro Valley, CA
Joy Johnson, PSYD is a Clinical Psychologist provider in Castro Valley, CA (NPI 1962603928).
Provider details
- NPI number
- 1962603928
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Female
- Sole proprietor
- Yes
- License
- PSY28452 (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
2 documented practice locations
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
Additional practice locations (1)
- 20253 Redwood Rd Ste aCastro Valley, CA 94546-4331Phone: (510) 224-4377
Registry dates
- Enumerated
- 2007-05-29
- Last updated
- 2025-10-10
- Certified
- 2025-10-10
Frequently asked questions
- What is Joy Johnson's NPI number?
- Joy Johnson's National Provider Identifier (NPI) is 1962603928, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joy Johnson's specialty?
- Joy Johnson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Joy Johnson located?
- Joy Johnson's practice location on file with NPPES is 20212 Redwood Rd Ste 104, Castro Valley, CA 94546-4375.
- What is Joy Johnson's phone number?
- The practice phone number listed in the NPPES registry for Joy Johnson is (510) 470-3540.
- Is Joy Johnson's NPI active?
- Yes — Joy Johnson's NPI (1962603928) is active in the NPPES registry as of the last update on 2025-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.