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MARIELLE JOHNSON LCSW
NPI 1821512260
Social Worker - Clinical in Hamden, CT

Active since July 27, 2017PECOS EnrolledAccepts Medicare Assignment
375 MATHER ST STE 1, HAMDEN, CT 06514(203) 601-2775(203) 601-2775 Get Directions Write a Review

NPPES record last updated: March 2, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 2, 2026, May 19, 2025, Jul 27, 2017 (3 updates tracked since 2017).

About Marielle Johnson Lcsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARIELLE JOHNSON LCSW (NPI 1821512260) is an individual clinical provider in Hamden, Connecticut, licensed in Connecticut (010590) and active in the NPI registry since July 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1821512260
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMARIELLE JOHNSONCredential: LCSW
Location Address375 MATHER ST STE 1Hamden, CT 06514-3101
Mailing Address375 Mather St Ste 1Hamden, CT 06514-3101 · (203) 601-2775
Phone(203) 601-2775
Fax(203) 601-2775
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateJuly 27, 2017
Last NPPES UpdateMarch 2, 20263 updates tracked since enumeration
NPPES CertifiedMarch 2, 2026
✔ NPI 1821512260 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in CT · 010590
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
Also ListedSocial WorkerTaxonomy 104100000X
375 MATHER ST STE 1, Hamden, CT 06514
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Other Names 1

Former Name (1)Marielle Daddona Lcsw

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marielle Johnson Lcsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1557694353
PECOS Enrollment IDI20190611000816
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06514 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $60.82 – $183.10
Typical copayment $0.00 (range $15.20 – $45.77)
Most-billed visit code NA
Established Patient
$75.55 typical visit price
range $19.76 – $149.26
Typical copayment $18.88 (range $4.94 – $37.31)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marielle Johnson's NPI number?

The NPI number for Marielle Johnson is 1821512260. It was assigned to this individual provider in the NPPES registry on July 27, 2017. The provider is also known as Marielle Daddona Lcsw.

Where is Marielle Johnson located?

Marielle Johnson practices at 375 Mather St Ste 1, Hamden, CT 06514. The listed phone number is (203) 601-2775.

What is Marielle Johnson's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Marielle Johnson enrolled in Medicare?

Yes. Marielle Johnson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Marielle Johnson accept?

Health plans from Providence Health Plan list Marielle Johnson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Marielle Johnson was last updated on March 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.