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Justin Siena High School

Local Education Agency (LEA) in Napa, CA · enumerated 2013 · authorized official Grace Manzo, Billing Specialist.

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

National Provider Identifier

1588003693

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Registry record

Entity type Organization (Type 2)
Legal business name Justin Siena High School
Parent organization Loyd Wolfe Juvenile Justice Network
Practice address 2310 1st St, Napa, CA, 94559
Phone (707) 255-1855
Fax (707) 255-5621
Enumeration date Jun 21, 2013
Last updated in NPPES Jun 21, 2013

Taxonomy & classification

251300000X Local Education Agency (LEA) Agencies Primary

Authorized official

Name Grace Manzo
Title Billing Specialist
Phone (707) 255-1855

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

Who is the authorized official for Justin Siena High School?
NPPES lists Grace Manzo (Billing Specialist) as the authorized official for this organization.
What is the NPI number for Justin Siena High School?
The NPI for Justin Siena High School is 1588003693, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-21.