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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

COURTNEY HATSUKO ONAGA
NPI 1003466970
Rehabilitation Practitioner in Costa Mesa, CA

Active since September 12, 2019
275 BAKER ST STE A, COSTA MESA, CA 92626(714) 361-6760 Get Directions Write a Review

NPPES record last updated: August 7, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Aug 7, 2026, Jun 20, 2025, Apr 3, 2025 and 4 more (7 updates tracked since 2019).

About Courtney Hatsuko Onaga NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

COURTNEY HATSUKO ONAGA (NPI 1003466970) is an individual rehabilitation practitioner in Costa Mesa, California and active in the NPI registry since September 2019. She maintains a secondary practice location in Irvine.

NPPES Registry Identity

NPI1003466970
Entity TypeIndividualFemale
Primary Taxonomy225400000X
Provider Legal NameCOURTNEY HATSUKO ONAGA
Location Address275 BAKER ST STE ACosta Mesa, CA 92626-4566
Mailing Address275 Baker St Ste ACosta Mesa, CA 92626-4566
Phone(714) 361-6760
Sole ProprietorNo
Enumeration DateSeptember 12, 2019
Last NPPES UpdateAugust 7, 20267 updates tracked since enumeration
NPPES CertifiedAugust 7, 2026
✔ NPI 1003466970 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRehabilitation PractitionerRespiratory, Developmental, Rehabilitative and Restorative Service Providers
Taxonomy Code225400000X
Definition
A health care practitioner who trains or retrains individuals disabled by disease or injury to help them attain their maximum functional capacity.
Also ListedCounselor · Mental HealthTaxonomy 101YM0800X
275 BAKER ST STE A, Costa Mesa, CA 92626
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Secondary Practice Location 1

Location 117782 Cowan Ste AIrvine, CA 92614-6041 · Phone (949) 722-7118

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ANTONIA PEREZ
Rehabilitation Practitioner
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 361-6760
HYOJIN BAE
Rehabilitation Practitioner
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 361-6706
KIMBERLY OCHOA ARZATE
Licensed Psychiatric Technician
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 361-6760
ALLISON JOY KILLOUGH
Counselor
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 361-6760
MEA PARKER
Counselor (Mental Health)
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 226-9888
MS. BROOK LYNN HUGHES
Counselor (Mental Health)
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 361-6760
MS. MELISSA ANN MIRANDO
Case Manager/Care Coordinator
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 361-6760
AMBAR SALMERON
Counselor (Mental Health)
275 BAKER ST STE A
COSTA MESA, CA 92626
Orange County (714) 361-6760

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Courtney Onaga's NPI number?

The NPI number for Courtney Onaga is 1003466970. It was assigned to this individual provider in the NPPES registry on September 12, 2019.

Where is Courtney Onaga located?

Courtney Onaga practices at 275 Baker St Ste A, Costa Mesa, CA 92626. The listed phone number is (714) 361-6760.

What is Courtney Onaga's specialty?

The primary specialty registered for this NPI is Rehabilitation Practitioner with taxonomy code 225400000X.

When was this NPI record last updated?

The NPPES record for Courtney Onaga was last updated on August 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.