210 ILCS 88/20

Bill information. If a hospital bills a patient for health care services, the hospital shall provide with its bill the following information:

(1) the date or dates that health care services were provided to the patient;

(2) a brief description of the hospital services;

(3) the amount owed for hospital services;

(4) hospital contact information for addressing billing inquiries;

(5) a statement regarding how an uninsured patient may apply for consideration under the hospital's financial assistance policy on or with each hospital bill sent to an uninsured patient; and

(6) notice that the patient may obtain an itemized bill upon request.

If a hospital bills a patient, then the hospital must provide an itemized statement of charges for the inpatient and outpatient services rendered by the hospital upon receiving a request from the patient.