Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alex Gieryna, O.D.
Optometrist in Greenwood, IN · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1154770204
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Registry record
Entity type Individual (Type 1)
Name Alex Gieryna
Credential O.D.
Sex Male
Practice address 1298 Us Highway 31 N, Greenwood, IN, 46142
Phone (317) 885-2020
Enumeration date Jun 9, 2016
Last updated in NPPES Jun 9, 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 Alex Gieryna?
The National Provider Identifier (NPI) for Alex Gieryna is 1154770204, a Type 1 (individual) record in the CMS NPPES registry.
Where does Alex Gieryna practice?
The practice location on file with NPPES is in Greenwood, IN. 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 2016-06-09.