RYAN K. ONISHI, O.D., AN OPTOMETRIC CORPORATION
NPI 1548435951
Clinic/Center - Health Service in San Juan Capistrano, CA
About Ryan K. Onishi, O.d., An Optometric Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
RYAN K. ONISHI, O.D., AN OPTOMETRIC CORPORATION (NPI 1548435951) is a healthcare organization registered as a health service in San Juan Capistrano, California and active in the NPI registry since April 2008. The organization lists Ryan K Onishi, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ryan K. Onishi, O.d., An Optometric Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Ryan K. Onishi, O.D., An Optometric Corporation, which bills Medicare for the services this clinician delivers.
Clinician (1)
San Juan Capistrano, CA 92675
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Ryan K. Onishi, O.D., An Optometric Corporation's NPI number?
The NPI number for Ryan K. Onishi, O.D., An Optometric Corporation is 1548435951. It was assigned to this organization in the NPPES registry on April 25, 2008.
Where is Ryan K. Onishi, O.D., An Optometric Corporation located?
Ryan K. Onishi, O.D., An Optometric Corporation is located at 31401 Rancho Viejo Rd Suite 103, San Juan Capistrano, CA 92675. The listed phone number is (949) 496-0552.
What is Ryan K. Onishi, O.D., An Optometric Corporation's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Health Service, with taxonomy code 261QH0100X.
Is Ryan K. Onishi, O.D., An Optometric Corporation enrolled in Medicare?
Yes. Ryan K. Onishi, O.D., An Optometric Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Ryan K. Onishi, O.D., An Optometric Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Optometry) reassigns their Medicare billing to Ryan K. Onishi, O.D., An Optometric Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Ryan K. Onishi, O.D., An Optometric Corporation was last updated on April 25, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years 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.
# Ryan K. Onishi, O.d., An Optometric Corporation · NPI 1548435951
Health Service organization in San Juan Capistrano, California. Organization record, active in the CMS NPPES registry since April 25, 2008.
## Identity
- **NPI:** 1548435951 (Entity type: Organization)
- **Enumerated:** April 25, 2008
- **Primary specialty:** Clinic/Center - Health Service · taxonomy 261QH0100X
- **Organization subpart:** No
- **Authorized official:** Ryan Onishi, PRESIDENT
## Practice location
- **Address:** 31401 RANCHO VIEJO RD, SUITE 103, San Juan Capistrano, CA 92675-1851
- **Phone:** (949) 496-0552
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Optometry) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 25, 2008
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Source: [NPI Profile](https://npiprofile.com/npi/1548435951) · Data from the CMS NPPES public registry.