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Karl S. Csiszer, O.D., P.C.

Optometrist in Sandwich, IL · enumerated 2007 · authorized official Karl Csiszer, President.

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

National Provider Identifier

1740335058

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Registry record

Entity type Organization (Type 2)
Legal business name Karl S. Csiszer, O.D., P.C.
Practice address 1112 E Railroad St, Suite 1, Sandwich, IL, 60548
Phone (815) 786-2020
Fax (815) 786-6306
Enumeration date Jan 24, 2007
Last updated in NPPES Mar 18, 2010

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License 046-006611 (IL) Primary

Authorized official

Name Karl Csiszer
Title President
Phone (815) 786-2020

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

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Karl S. Csiszer, O.D., P.C.?
Karl S. Csiszer, O.D., P.C. is registered in NPPES as a Optometrist (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-18.