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

Cathy Ryu, PT, DPT

Physical Therapist in Fullerton, CA · enumerated 2007 · practices at Fullerton Elementary School District.

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

National Provider Identifier

1013129949

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Registry record

Entity type Individual (Type 1)

Name Cathy Ryu

Credential PT, DPT

Sex Female

Practice address Fullerton, CA, 92833

Phone (714) 447-7400

Enumeration date May 4, 2007

Last updated in NPPES Aug 5, 2026

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

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 33458 (CA) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT credential

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 1013129949 active?

Yes, as of the latest NPPES snapshot, NPI 1013129949 is active (record last updated 2026-08-05).

How do I verify Cathy Ryu's NPI record?

Cross-check NPI 1013129949 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-08-05.