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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. John J Geiser, OD

Optometrist in Lacon, IL · enumerated 2006 · practices at John J Geiser O.D..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1578580189

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Registry record

Entity type Individual (Type 1)
Name Dr. John J Geiser
Credential OD
Sex Male
Practice address Lacon, IL, 61540
Phone (309) 246-8177
Fax (309) 246-3472
Enumeration date Jul 17, 2006
Last updated in NPPES Mar 10, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers Primary
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.

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Frequently asked questions

Where does John Geiser practice?
The practice location on file with NPPES is in Lacon, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Geiser?
The National Provider Identifier (NPI) for John Geiser is 1578580189, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-10.