Sandra Johnstone, SLP-A
NPI 1891449419 · Speech-Language Assistant · Concord, CA
Sandra Johnstone, SLP-A is a Speech-Language Assistant provider in Concord, CA (NPI 1891449419).
Provider details
- NPI number
- 1891449419
- Entity type
- Individual
- Primary specialty
- Speech-Language AssistantSpeech, Language and Hearing Service Providers
- Credential
- SLP-A
- Sex
- Female
- Sole proprietor
- Yes
- License
- 201681 (AR)
Specialties & taxonomies
Speech, Language and Hearing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES 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
- 2022-02-11
- Last updated
- 2022-02-11
- Certified
- 2022-02-11
Frequently asked questions
- What is Sandra Johnstone's NPI number?
- Sandra Johnstone's National Provider Identifier (NPI) is 1891449419, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sandra Johnstone's specialty?
- Sandra Johnstone is listed in the NPPES registry with a primary specialty of Speech-Language Assistant (Speech, Language and Hearing Service Providers).
- Where is Sandra Johnstone located?
- Sandra Johnstone's practice location on file with NPPES is 5290 S Montecito Dr, Concord, CA 94521-5502.
- What is Sandra Johnstone's phone number?
- The practice phone number listed in the NPPES registry for Sandra Johnstone is (949) 212-3268.
- Is Sandra Johnstone's NPI active?
- Yes — Sandra Johnstone's NPI (1891449419) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.