Geannie Johnston, RADT-1
NPI 1710865480 · Addiction (Substance Use Disorder) Counselor · Fairfield, CA
Geannie Johnston, RADT-1 is a Addiction (Substance Use Disorder) Counselor provider in Fairfield, CA (NPI 1710865480).
Provider details
- NPI number
- 1710865480
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- RADT-1
- Sex
- Female
- Sole proprietor
- Yes
- License
- R1623900725 (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
Under 1 yr in registry
- Profile completeness38% of score
100% 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
- 2025-08-21
- Last updated
- 2025-08-21
- Certified
- 2025-08-21
Frequently asked questions
- What is Geannie Johnston's NPI number?
- Geannie Johnston's National Provider Identifier (NPI) is 1710865480, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Geannie Johnston's specialty?
- Geannie Johnston is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Geannie Johnston located?
- Geannie Johnston's practice location on file with NPPES is 623 Great Jones St, Fairfield, CA 94533-6005.
- What is Geannie Johnston's phone number?
- The practice phone number listed in the NPPES registry for Geannie Johnston is (707) 429-8888.
- Is Geannie Johnston's NPI active?
- Yes — Geannie Johnston's NPI (1710865480) is active in the NPPES registry as of the last update on 2025-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.