Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ashley Ngoc To, OTR/L
Occupational Therapist in Brea, CA · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598356834
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Registry record
Entity type Individual (Type 1)
Name Ashley Ngoc To
Credential OTR/L
Sex Female
Practice address 875 N Brea Blvd, Brea, CA, 92821
Phone (808) 234-8193
Enumeration date Jan 29, 2021
Last updated in NPPES Jan 29, 2021
Taxonomy & licenses
225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 22057 (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.
Frequently asked questions
What is the NPI number for Ashley To?
The National Provider Identifier (NPI) for Ashley To is 1598356834, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ashley To practice?
The practice location on file with NPPES is in Brea, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Chiangyuan Liau Dermatology Physician · Brea, CA NPI 1891721171 Thc - Orange County LLC Long Term Care Hospital · Brea, CA NPI 1780768416 Marjorie Delos Angeles Community Health Worker · Brea, CA NPI 1801920673 Adrian Bose Critical Care Medicine (Internal Medicine) Physician · Brea, CA NPI 1104032630 Thc - Orange County, LLC Skilled Nursing Facility · Brea, CA NPI 1629240577 Thc - Orange County, LLC General Practice Physician · Brea, CA NPI 1902038169 Jan Snavely Speech-Language Pathologist · Brea, CA NPI 1386971380 Knd Development 59, LLC Hospitalist Physician · Brea, CA NPI 1346579943
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-29.