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The IWCC will be closed on Thursday, June 19th, 2025, in observance of Juneteenth.

Assessments and self-insurance fees can now be paid electronically. Click here for instructions. 

Explanations of Benefits (EOB)

Pursuant to Commission Rules in 50 Ill. Adm. Code 9110.100(c), effective January 24, 2020: “A paper explanation of benefits or SPR must also prominently contain all information necessary to match the explanation of benefits with the associated Medical Bill. A list of any relevant data elements listed in subsection [9110.100(a)] that are required for the paper explanation of benefits or SPR is available at no cost via a link on the Commission's website.

Illinois Paper EOB Requirements

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Contact Information

Chicago: 312-814-6500

Springfield: 217-785-7087

Collinsville: 618-346-3484

Peoria: 312-814-6500

Rockford: 312-814-6500 If you intend to visit our Peoria or Rockford office, please call first to make sure the office is open.

TDD/TTY Support Line: 866-383-4370

Support: wcc.compfile@illinois.gov

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