Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Leon J. Kosek, OD

Individual provider Optometrist · NPI 1801834080

Dr. Leon J. Kosek, OD is an Optometrist in Frankfort, Illinois. Practices as a sole proprietor. Licensed in Illinois and Indiana.

Licensed in
IL, IN
In the registry since
2006
Specialties on file
2
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

21237 S Lagrange Rd
Frankfort, IL 60423-2046
Phone: (815) 469-8541
Fax: (815) 469-8126
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 046007472 (IL)
Optometrist Taxonomy 152W00000X · Licence 18001974A (IN)

Record details

NPI number1801834080
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorYes
NPI enumeratedJune 2, 2006
Last updated in NPPESJuly 6, 2011

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