Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William Payne Richardson, O.D.
Optometrist in Auburn, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588685044
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Registry record
Entity type Individual (Type 1)
Name Dr. William Payne Richardson
Credential O.D.
Sex Male
Practice address 12185 Alta Mesa Dr, Auburn, CA, 95603
Phone (530) 401-1063
Fax (530) 653-2045
Enumeration date Jul 21, 2006
Last updated in NPPES Oct 3, 2013
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| SD0055880 | Medicaid | CA | - |
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 specialty is William Richardson?
William Richardson is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-03.