Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Williams & Bassoli, LLP

Q: What is the NPI number for Williams & Bassoli, LLP?

The NPI for Williams & Bassoli, LLP is 1720555642, a Type 2 (organization) record in the CMS NPPES registry.

Clinical Social Worker in Southington, CT · enumerated 2018 · authorized official Katie Bassoli, Partner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1720555642

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Registry record

Entity type Organization (Type 2)

Legal business name Williams & Bassoli, LLP

Other name <Unavail>

Practice address 132 Main St Ste 2a, Southington, CT, 06489

Phone (860) 276-4459

Enumeration date Oct 29, 2018

Last updated in NPPES Jun 10, 2024

Taxonomy & classification

101YP2500X Professional Counselor Behavioral Health & Social Service Providers Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers Primary

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers Secondary

Authorized official

Name Katie Bassoli

Title Partner

Phone (860) 878-4367

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Williams & Bassoli, LLP?

The NPI for Williams & Bassoli, LLP is 1720555642, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Williams & Bassoli, LLP?

NPPES lists Katie Bassoli (Partner) as the authorized official for this organization.

Providers at this address

Browse all →

Kathryn Murray Professional Counselor · Southington, CT NPI 1215953989 Seiyefa Sikpi Marriage & Family Therapist · Southington, CT NPI 1376746966 Karen Daigle Destefano Addiction (Substance Use Disorder) Counselor · Southington, CT NPI 1679710164 Jennifer Finefrock Professional Counselor · Southington, CT NPI 1346521754 Michelle Williams Clinical Social Worker · Southington, CT NPI 1144504309 Katie Cushman Clinical Social Worker · Southington, CT NPI 1801132857 Joanna Jacovino Social Worker · Southington, CT NPI 1710422068

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-06-10.