Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Crystal Mac Guire

School Counselor in Ontario, CA · enumerated 2024.

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

National Provider Identifier

1578390373

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Registry record

Entity type Individual (Type 1)

Name Crystal Mac Guire

Sex Female

Practice address 715 W Francis St, Ontario, CA, 91762

Phone (909) 984-1759

Enumeration date Sep 16, 2024

Last updated in NPPES Sep 16, 2024

Taxonomy & licenses

101YS0200X School Counselor Behavioral Health & Social Service Providers · License 220251655 (CA) 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

Is NPI 1578390373 active?

Yes, as of the latest NPPES snapshot, NPI 1578390373 is active (record last updated 2024-09-16).

How do I verify Crystal Mac Guire's NPI record?

Cross-check NPI 1578390373 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Danielle Johnson Community Health Worker · Ontario, CA NPI 1225990013 Claudia Scott Speech-Language Pathologist · Ontario, CA NPI 1225992381 Eunice Choi Speech-Language Pathologist · Ontario, CA NPI 1972462828 Jennifer Lopez Health & Wellness Coach · Ontario, CA NPI 1194674226 Josie Avila Health & Wellness Coach · Ontario, CA NPI 1720938111

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-16.