Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Mecca Jr., LCSW

Addiction (Substance Use Disorder) Counselor in Westport, CT · enumerated 2006.

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

National Provider Identifier

1073565438

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Registry record

Entity type Individual (Type 1)

Name William Mecca Jr.

Credential LCSW

Sex Male

Practice address 4 Whitney Extention, Westport, CT, 06880

Phone (203) 257-3181

Fax (203) 375-1999

Enumeration date May 16, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 000574 (CT) Primary

104100000X Social Worker Behavioral Health & Social Service Providers · License 003871 (CT) Secondary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

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 William Mecca?

The National Provider Identifier (NPI) for William Mecca is 1073565438, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Mecca practice?

The practice location on file with NPPES is in Westport, CT. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.