Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Gregory John Hayes, O.D.
Optometrist in San Diego, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1598896102
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Registry record
Entity type Individual (Type 1)
Name Dr. Gregory John Hayes
Credential O.D.
Sex Male
Practice address 11717 Bernardo Plaza Ct, Suite 150, San Diego, CA, 92128
Phone (858) 487-5504
Fax (858) 487-3654
Enumeration date Mar 7, 2007
Last updated in NPPES Feb 26, 2016
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
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 is the NPI number for Gregory Hayes?
The National Provider Identifier (NPI) for Gregory Hayes is 1598896102, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gregory Hayes practice?
The practice location on file with NPPES is in San Diego, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-26.