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

Leonard Joseph Hertko, MD

Individual provider Internal Medicine Physician · NPI 1407090491

Leonard Joseph Hertko, MD is an Internal Medicine Physician in Orland Park, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2009
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

13561 Ishnala Dr
Orland Park, IL 60462-1885
Phone: (708) 349-7112
Fax: (866) 253-5694
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036038642 (IL)

Record details

NPI number1407090491
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 22, 2009
Last updated in NPPESApril 22, 2009

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