Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1013129949 Individual Practitioner Female Practitioner

Dr. Cathy Ryu , PT, DPT

Physical Therapist • Fullerton, CA

Professional Overview & Biography Verified Profile Summary

Dr. Cathy Ryu, PT, DPT is a registered healthcare professional specializing in Physical Therapist in Fullerton, CA. Practice services are available at 1401 W VALENCIA DR under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

1401 W Valencia Dr

Fullerton, CA 928333998

Telephone 7144477400
Associated Practice Facility / Clinic

Specialty Benchmarks & Practice Insights

Comparative analytics for Physical Therapist in Fullerton, CA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 16.0 Yrs
State Avg: 16.1 Yrs
Regional Practice Density
60 Specialists

Practicing in Fullerton, CA (22820 Statewide)

Telehealth Adoption Rate
0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

CMS Verified: 2026-08-05
Physical Therapist Primary Specialty

NUCC Taxonomy Code: 225100000X

State License CA 33458

Physical therapists (PTs) are licensed health care professionals who diagnose and treat individuals of all ages, from newborns to the very oldest, who have medical problems or other health-related conditions that limit their abilities to move and perform functional activities in their daily lives. PTs examine each individual and develop a plan using treatment techniques to promote the ability to move, reduce pain, restore function, and prevent disability. In addition, PTs work with individuals to prevent the loss of mobility before it occurs by developing fitness- and wellness-oriented programs for healthier and more active lifestyles. PTs: 1.Diagnose and manage movement dysfunction and enhance physical and functional abilities. 2.Restore, maintain, and promote not only optimal physical function but optimal wellness and fitness and optimal quality of life as it relates to movement and health. 3.Prevent the onset, symptoms, and progression of impairments, functional limitations, and disabilities that may result from diseases, disorders, conditions, or injuries. 4.Treat conditions of the musculoskeletal, neuromuscular, cardiovascular, pulmonary, and/or integumentary systems. 5.Address the negative effects attributable to unique personal and environmental factors as they relate to human performance. 6.PTs provide care for people in a variety of settings, including hospitals, private practices, outpatient clinics, home health agencies, schools, sports and fitness facilities, work settings, and nursing homes. State licensure is required in each state in which a PT practices.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

5 Associated Practitioners
Candace Mercado

Psychologist - School

NPI 1124612635
Kathryn Whitaker

Psychologist - School

NPI 1568335834
Deborah Yi Hui Tan

Psychologist - School

NPI 1619858248
Kimberly Cung

Psychologist - School

NPI 1710850649
Quiriana Angeles

Psychologist - School

NPI 1972477099

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

9 Historical Events
📍
Updated Practice Location August 05, 2026

Registered at 1401 W VALENCIA DR, FULLERTON, CA 928333998 (Tel: 7144477400)

📍
Updated Business Mailing Address August 05, 2026

Registered at 595 S CHIPWOOD ST, ORANGE, CA 928695302 (Tel: 9493316989)

👤
Provider Name / Credentials Updated August 05, 2026

Recorded as CATHY RYU, PT, DPT

NPI Profile Active June 26, 2009

NPI status registered as active in NPPES database

📍
Updated Practice Location June 26, 2009

Registered at 24012 CALLE DE LA PLATA, SUITE 355, LAGUNA HILLS, CA 926533621 (Tel: 9499161654)

📍
Updated Business Mailing Address June 26, 2009

Registered at 808 ESTANCIA, IRVINE, CA 926021118

👤
Provider Name / Credentials Updated June 26, 2009

Recorded as CATHY PREMYSLER, PT, DPT

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 26, 2009

Physical Therapist (License #33458 in CA)

🟢
Initial NPI Registration & Enumeration May 04, 2007

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1013129949
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 04, 2007
Last Update: August 05, 2026
Sole Proprietor: Yes

Mailing Address

595 S Chipwood St

Orange, CA 928695302

Phone: 9493316989

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.