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

Tony Toan Nguyen

Marriage & Family Therapist in Tustin, CA · enumerated 2010.

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

National Provider Identifier

1588979504

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Registry record

Entity type Individual (Type 1)
Name Tony Toan Nguyen
Sex Male
Practice address Tustin, CA, 92780
Phone (714) 202-7334
Enumeration date Aug 13, 2010
Last updated in NPPES Nov 3, 2019

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

Taxonomy & licenses

225400000X Rehabilitation Practitioner Respiratory, Developmental, Rehabilitative and Restorative Service Providers Secondary
106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 107936 (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.

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Frequently asked questions

What is the NPI number for Tony Nguyen?
The National Provider Identifier (NPI) for Tony Nguyen is 1588979504, a Type 1 (individual) record in the CMS NPPES registry.
Where does Tony Nguyen practice?
The practice location on file with NPPES is in Tustin, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-11-03.