Marielle Johnson, LCSW
NPI 1821512260 · Clinical Social Worker · Hamden, CT
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marielle Johnson, LCSW is a Clinical Social Worker provider in Hamden, CT (NPI 1821512260).
Provider details
- NPI number
- 1821512260
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Social Worker104100000X
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
8 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
- 2017-07-27
- Last updated
- 2026-03-02
- Certified
- 2026-03-02
Frequently asked questions
- What is Marielle Johnson's NPI number?
- Marielle Johnson's National Provider Identifier (NPI) is 1821512260, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marielle Johnson's specialty?
- Marielle Johnson is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Marielle Johnson located?
- Marielle Johnson's practice location on file with NPPES is 375 Mather St Ste 1, Hamden, CT 06514-3101.
- What is Marielle Johnson's phone number?
- The practice phone number listed in the NPPES registry for Marielle Johnson is (203) 601-2775.
- Does Marielle Johnson accept Medicare?
- Marielle Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marielle Johnson's NPI active?
- Yes — Marielle Johnson's NPI (1821512260) is active in the NPPES registry as of the last update on 2026-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.