Darin Alexander
NPI 1225303845 · Addiction (Substance Use Disorder) Counselor · Fairfield, CA
Darin Alexander is a Addiction (Substance Use Disorder) Counselor provider in Fairfield, CA (NPI 1225303845).
Provider details
- NPI number
- 1225303845
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
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
14 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
- 2012-03-14
- Last updated
- 2012-03-14
Frequently asked questions
- What is Darin Alexander's NPI number?
- Darin Alexander's National Provider Identifier (NPI) is 1225303845, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darin Alexander's specialty?
- Darin Alexander is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Darin Alexander located?
- Darin Alexander's practice location on file with NPPES is 1735 Enterprise Dr, Fairfield, CA 94533-6822.
- What is Darin Alexander's phone number?
- The practice phone number listed in the NPPES registry for Darin Alexander is (707) 425-1799.
- Is Darin Alexander's NPI active?
- Yes — Darin Alexander's NPI (1225303845) is active in the NPPES registry as of the last update on 2012-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.