Karen Johnston, PH.D.
NPI 1003044215 · Clinical Psychologist · Saint Louis, MO
Karen Johnston, PH.D. is a Clinical Psychologist provider in Saint Louis, MO (NPI 1003044215).
Provider details
- NPI number
- 1003044215
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 00 (MO)
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
16 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
- 2009-06-25
- Last updated
- 2009-06-25
Frequently asked questions
- What is Karen Johnston's NPI number?
- Karen Johnston's National Provider Identifier (NPI) is 1003044215, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Johnston's specialty?
- Karen Johnston is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Karen Johnston located?
- Karen Johnston's practice location on file with NPPES is 1 Jefferson Barracks Dr, Saint Louis, MO 63125-4181.
- What is Karen Johnston's phone number?
- The practice phone number listed in the NPPES registry for Karen Johnston is (314) 652-4100.
- Is Karen Johnston's NPI active?
- Yes — Karen Johnston's NPI (1003044215) is active in the NPPES registry as of the last update on 2009-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.