Joseph Louis Poswinski, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

16795 Issued in CT

Practice address

268 Post Road
Suite 200
Fairfield, CT 06824-6220

Phone

(860) 406-3844

NPI assigned

Mar 31, 2025

Last updated

Aug 11, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other names 1

• Jay Poswinski Other name

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• S-Aderra Achievement, PLLC

  • Clinical Social Worker
  • Danbury, CT
  • NPI 1831013085
  Authorized official Same address or phone

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

{
    "created_epoch": "1743379200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786406400000",
    "number": "1548063084",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "268 POST ROAD",
            "address_2": "SUITE 200",
            "city": "FAIRFIELD",
            "state": "CT",
            "postal_code": "068246220",
            "telephone_number": "860-406-3844"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "268 POST ROAD",
            "address_2": "SUITE 200",
            "city": "FAIRFIELD",
            "state": "CT",
            "postal_code": "068246220",
            "telephone_number": "860-406-3844"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "POSWINSKI",
        "first_name": "JOSEPH",
        "middle_name": "LOUIS",
        "credential": "LCSW",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2025-03-31",
        "last_updated": "2026-08-11",
        "certification_date": "2026-08-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CT",
            "license": "16795",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "JAY",
            "last_name": "POSWINSKI",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Megan Leigh Poletto, PT, DPT
• Ari T Pollack, M.D.
• Lazaro N Pomeraniec, MD
• Kathryn Porri
• Deborah Lynne Portnay, LCSW
• David J Potucek, MSPT, CFMT
• Stephen Miguel Pou, DDS
• Dana J Power-Lewis, APRN, MSN, FNP-BC
• Clare Powers, LPC
• Jennifer Powers, DPT

• Clinical Social Worker in Fairfield, CT
• Providers in Fairfield, 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 Aug 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.