Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William Jay Cappello, D.M.D

General Practice Dentistry in Trumbull, CT · enumerated 2015.

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

National Provider Identifier

1518348093

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Registry record

Entity type Individual (Type 1)

Name Dr. William Jay Cappello

Credential D.M.D

Sex Male

Practice address Trumbull, CT, 06611

Phone (203) 816-5545

Fax (203) 816-5637

Enumeration date Jun 10, 2015

Last updated in NPPES Mar 2, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 11408 (CT) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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

Where does William Cappello practice?

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

What is the NPI number for William Cappello?

The National Provider Identifier (NPI) for William Cappello is 1518348093, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-02.