Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Ronald Yoneo Hayashida, O.D.
Corneal and Contact Management Optometrist in Yucca Valley, CA · enumerated 2005 · practices at Russell R Slaugh Od An Optometric Corporation.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1043294929
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| SD0045740 | Medicaid | CA | - |
| GSD004460 | Other | CA | MEDICAID GROUP NUMBER |
| FU077A | Other | CA | MEDICARE GROUP NUMBER |
| 1245517804 | Other | CA | GROUP NPI |
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.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-21.