Karl S. Csiszer, O.D., P.C.
About this NPIWhat this record shows.
NPI 1740335058 is registered to Karl S. Csiszer, O.D., P.C., a healthcare organisation classified as "Optometrist" and located at 1112 E Railroad St, Suite 1 in Sandwich, Illinois. The organisation's authorised official is Karl Csiszer. The organisation has been enumerated in the NPI registry since 2007.
Your brand here.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Karl S. Csiszer, O.D., P.C. accepts. To confirm in-network status with your specific health plan, contact Karl S. Csiszer, O.D., P.C. directly at (815) 786-2020.
Frequently asked
Yes. NPI 1740335058 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Optometrist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (815) 786-2020.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Karl S. Csiszer, O.D., P.C. is a Type-2 organisational NPI.