Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William Baxter Harris, OD OPTOMETRIST
Optometrist in Yucca Valley, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1528112091
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Registry record
Entity type Individual (Type 1)
Name William Baxter Harris
Credential OD OPTOMETRIST
Sex Male
Practice address 57990 29 Palms Highway, Suite 2b, Yucca Valley, CA, 92284
Phone (760) 365-6868
Fax (760) 365-7632
Enumeration date Jan 22, 2007
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 4923T | Other | CA | STATE OF CALIFORNIA |
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
Is NPI 1528112091 active?
Yes, as of the latest NPPES snapshot, NPI 1528112091 is active (record last updated 2007-07-08).
How do I verify William Harris's NPI record?
Cross-check NPI 1528112091 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.