Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Donald J Guido
Optometrist in La Verne, CA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1275526279
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Registry record
Entity type Individual (Type 1)
Name Donald J Guido
Sex Male
Practice address 2248 D St, La Verne, CA, 91750
Phone (909) 593-3519
Fax (909) 593-3521
Enumeration date Aug 24, 2005
Last updated in NPPES Apr 22, 2009
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| SD0072050 | 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
Where does Donald Guido practice?
The practice location on file with NPPES is in La Verne, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Donald Guido?
The National Provider Identifier (NPI) for Donald Guido is 1275526279, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-22.