Joanna Harris
NPI 1255037206 · Mental Health Counselor · Castro Valley, CA
Joanna Harris is a Mental Health Counselor provider in Castro Valley, CA (NPI 1255037206).
Provider details
- NPI number
- 1255037206
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
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
3 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2023-02-01
- Last updated
- 2023-02-01
- Certified
- 2023-02-01
Frequently asked questions
- What is Joanna Harris's NPI number?
- Joanna Harris's National Provider Identifier (NPI) is 1255037206, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Harris's specialty?
- Joanna Harris is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Joanna Harris located?
- Joanna Harris's practice location on file with NPPES is 4537 Edwards Ln, Castro Valley, CA 94546-4734.
- What is Joanna Harris's phone number?
- The practice phone number listed in the NPPES registry for Joanna Harris is (510) 690-1330.
- Is Joanna Harris's NPI active?
- Yes — Joanna Harris's NPI (1255037206) is active in the NPPES registry as of the last update on 2023-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.