Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Erick Esser, OD
Optometrist in Fullerton, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1790855062
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Registry record
Entity type Individual (Type 1)
Name Dr. John Erick Esser
Credential OD
Sex Male
Practice address 301 W Bastanchury Rd, Suite 10, Fullerton, CA, 92835
Phone (714) 879-7372
Fax (714) 879-4304
Enumeration date Nov 8, 2006
Last updated in NPPES Jul 8, 2007
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 |
|---|---|---|---|
| 11350T | Other | CA | STATE BOARD OF OPTOMETRY |
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 John Esser?
John Esser 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.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.