IndividualActive
Dianna Collier
NPI 1255514337 · Social Worker · Concord, CA
Dianna Collier is a Social Worker provider in Concord, CA (NPI 1255514337).
Provider details
- NPI number
- 1255514337
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral 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
2425 Bisso Ln
#280
Concord, CA 94520-4897
Phone: (925) 646-5122
Street-level locationGet directions
Mailing address
37201 Paseo Padre Pkwy
Fremont, CA 94536-2542
Registry dates
- Enumerated
- 2007-12-11
- Last updated
- 2007-12-11
Frequently asked questions
- What is Dianna Collier's NPI number?
- Dianna Collier's National Provider Identifier (NPI) is 1255514337, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dianna Collier's specialty?
- Dianna Collier is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Dianna Collier located?
- Dianna Collier's practice location on file with NPPES is 2425 Bisso Ln, Concord, CA 94520-4897.
- What is Dianna Collier's phone number?
- The practice phone number listed in the NPPES registry for Dianna Collier is (925) 646-5122.
- Is Dianna Collier's NPI active?
- Yes — Dianna Collier's NPI (1255514337) is active in the NPPES registry as of the last update on 2007-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.