820 ILCS 310/12
An employer requesting such an examination, of an employee residing within the State of Illinois, shall deliver to the employee with the notice of the time and place of examination sufficient money to defray the necessary expense of travel by the most convenient means to and from the place of examination, and the cost of meals necessary during the trip, and if the examination or travel to and from the place of examination causes any loss of working time on the part of the employee, the employer shall reimburse him for such loss of wages upon the basis of his average daily wage. Such examination shall be made in the presence of a duly qualified medical practitioner or surgeon provided and paid for by the employee, if such employee so desires.
In all cases where the examination is made by a physician or surgeon engaged by the employer, and the employee has no physician or surgeon present at such examination, it shall be the duty of the physician or surgeon making the examination at the instance of the employer to deliver to the employee, or his representative, a statement in writing of the examination and findings to the same extent that said physician or surgeon reports to the employer and the same shall be an exact copy of that furnished to the employer, said copy to be furnished the employee, or his representative as soon as practicable but not later than the time the case is set for hearing. Such delivery shall be made in person either to the employee or his representative, or by registered mail to either, and the receipt of either shall be proof of such delivery. If such physician or surgeon refuses to furnish the employee with such statement to the same extent as that furnished the employer said physician or surgeon shall not be permitted to testify at the hearing next following said examination.
If the employee refuses so to submit himself to examination or unnecessarily obstructs the same, his right to compensation payment shall be temporarily suspended until such examination shall have taken place, and no compensation shall be payable under this Act for such period.
It shall be the duty of physicians or surgeons treating an employee who is likely to die, and treating him at the instance of the employer, to have called in another physician or surgeon to be designated and paid for by either the employee or by the person or persons who would become his beneficiary or beneficiaries, to make an examination before the death of such employee.
In all cases where the examination is made by a physician or surgeon engaged by the employee, and the employer has no physician or surgeon present at such examination, it shall be the duty of the physician or surgeon making the examination at the instance of the employee, to deliver to the employer, or his representative, a statement in writing of the condition and extent of the examination and findings to the same extent that said physician or surgeon reports to the employee and the same shall be an exact copy of that furnished to the employee, said copy to be furnished the employer, or his representative, as soon as practicable but not later than the time the case is set for hearing. Such delivery shall be made in person either to the employer, or his representative, or by registered mail to either, and the receipt of either shall be proof of such delivery. If such physician or surgeon refuses to furnish the employer with such statement to the same extent as that furnished the employee, said physician or surgeon shall not be permitted to testify at the hearing next following said examination.
It shall be the duty of such pathologist to perform such autopsy as, in his best judgment, is required to ascertain the cause of death. Such pathologist shall make a complete written report of all his findings to the commission (including laboratory results described as such, if any). The said report of the pathologist shall contain his findings on post-mortem examination and said report shall not contain any conclusion of the said pathologist based upon the findings so reported.
Said report shall be placed on file with the commission, and shall be a public record. Said report, or a certified copy thereof, may be introduced by either party on any hearing as evidence of the findings therein stated, but shall not be conclusive evidence of such findings, and either party may rebut any part thereof.
Where an autopsy has been performed at any time with the express or implied consent of any interested party, and without some opposing party, if known or reasonably ascertainable, having reasonable notice of and reasonable opportunity of witnessing the same, all evidence obtained by such autopsy shall be barred upon objection at any hearing. This paragraph shall not apply to autopsies by a coroner's physician in the discharge of his official duties.
820 ILCS 310/12