Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Alexandra Lee Guarnieri

Specialist in Staten Island, NY · enumerated 2023.

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

National Provider Identifier

1508638396

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Registry record

Entity type Individual (Type 1)

Name Mrs. Alexandra Lee Guarnieri

Sex Female

Practice address 271 Bryson Ave, Staten Island, NY, 10314

Phone (646) 431-8206

Enumeration date Oct 25, 2023

Last updated in NPPES Oct 25, 2023

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 1244928 (NY) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Alexandra Guarnieri?

The National Provider Identifier (NPI) for Alexandra Guarnieri is 1508638396, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alexandra Guarnieri practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-10-25.