Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. William Arthur Lazzaro

Addiction (Substance Use Disorder) Counselor in Lemon Grove, CA · enumerated 2007.

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

National Provider Identifier

1699985663

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Registry record

Entity type Individual (Type 1)

Name Mr. William Arthur Lazzaro

Sex Male

Practice address 2049 Skyline Dr, Lemon Grove, CA, 91945

Phone (619) 465-7303

Enumeration date May 22, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

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

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.

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Frequently asked questions

Where does William Lazzaro practice?

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

What is the NPI number for William Lazzaro?

The National Provider Identifier (NPI) for William Lazzaro is 1699985663, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.