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Diahann Overall
NPI 1407054927 · Mental Health Counselor · San Leandro, CA
Diahann Overall is a Mental Health Counselor provider in San Leandro, CA (NPI 1407054927).
Provider details
- NPI number
- 1407054927
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(82/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
2500 Fairmont Dr
San Leandro, CA 94578-1006
Phone: (510) 667-3000
Street-level locationGet directions
Mailing address
12258 Terrace View Ln
Waterford, CA 95386-8901
Registry dates
- Enumerated
- 2007-07-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Diahann Overall's NPI number?
- Diahann Overall's National Provider Identifier (NPI) is 1407054927, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diahann Overall's specialty?
- Diahann Overall is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Diahann Overall located?
- Diahann Overall's practice location on file with NPPES is 2500 Fairmont Dr, San Leandro, CA 94578-1006.
- What is Diahann Overall's phone number?
- The practice phone number listed in the NPPES registry for Diahann Overall is (510) 667-3000.
- Is Diahann Overall's NPI active?
- Yes — Diahann Overall's NPI (1407054927) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.