Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Hyosun Ahn

Individual provider Occupational Therapist · NPI 1255820478

Hyosun Ahn is registered under Occupational Therapist in Private Practice in Sunnyvale, California. Qualified in 2005, 21 years ago. Practices with Orthopaedic and Neurological Rehab Inc, a 417-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
21
Licensed in
CA
In the registry since
2018
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Practice location Address checks out

1039 E El Camino Real
Sunnyvale, CA 94087-7719
Phone: (408) 599-0088
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Occupational Therapist (primary) Taxonomy 225X00000X · Licence 8597 (CA)

Record details

NPI number1255820478
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedMay 3, 2018
Last updated in NPPESMay 3, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOCCUPATIONAL THERAPIST IN PRIVATE PRACTICE
Medical schoolOTHER
Graduated 2005 (21 years in practice)
Group practice Orthopaedic And Neurological Rehab Inc — 417 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients18
Services billed 511 a service is one billed item, such as a visit, a test or a procedure
Average patient age88

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Orthopaedic and Neurological Rehab Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 417 clinicians in the practice; 12 are shown here.

Other providers in Sunnyvale