S-Aderra Achievement, PLLC

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

Legal business name

S-ADERRA ACHIEVEMENT, PLLC

Practice address

44 Old Ridgebury Rd Ste P130
Danbury, CT 06810-5107

Phone

(860) 406-3844

NPI assigned

Aug 8, 2026

Organization subpart

No

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name

Joseph Louis Poswinski, LCSWNPI 1548063084

Title

Group Practice Owner / Clinician

Phone

(860) 406-3844

Specialties & licenses 1

Addresses

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Joseph Louis Poswinski, LCSW

  • Clinical Social Worker
  • Fairfield, CT
  • NPI 1548063084
  NPD (past) Authorized official

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1786147200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1789084800000",
    "number": "1831013085",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "44 OLD RIDGEBURY RD STE P130",
            "city": "DANBURY",
            "state": "CT",
            "postal_code": "068105107",
            "telephone_number": "860-406-3844"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "44 OLD RIDGEBURY RD STE P130",
            "city": "DANBURY",
            "state": "CT",
            "postal_code": "068105107",
            "telephone_number": "860-406-3844"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "S-ADERRA ACHIEVEMENT, PLLC",
        "organizational_subpart": "NO",
        "enumeration_date": "2026-08-08",
        "last_updated": "2026-09-11",
        "certification_date": "2026-09-11",
        "status": "A",
        "authorized_official_last_name": "POSWINSKI",
        "authorized_official_first_name": "JOSEPH",
        "authorized_official_middle_name": "LOUIS",
        "authorized_official_title_or_position": "GROUP PRACTICE OWNER / CLINICIAN",
        "authorized_official_telephone_number": "860-406-3844",
        "authorized_official_credential": "LCSW"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Social Worker, Clinical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Caitlyn Russo
• Ann Frances Ruvolo, DMD
• Emma Ryan, M.D.
• Jennifer M Ryan, NP
• Brooke Rynn, PA
• S.M.I.L.E Homecare Services LLC
• Melissa A Saad, DO
• Stephanie N Sabato, PA
• Kristen Marie Sadana, M.D.
• Ambereen Sadiq

• Clinical Social Worker in Danbury, CT
• Providers in Danbury, CT by specialty
• Clinical Social Worker in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.