725 ILCS 5/115-13

In a prosecution for violation of Section 11-1.20, 11-1.30, 11-1.40, 11-1.50, 11-1.60, 12-13, 12-14, 12-14.1, 12-15 or 12-16 of the Criminal Code of 1961 or the Criminal Code of 2012, statements made by the victim to medical personnel for purposes of medical diagnosis or treatment including descriptions of the cause of symptom, pain or sensations, or the inception or general character of the cause or external source thereof insofar as reasonably pertinent to diagnosis or treatment shall be admitted as an exception to the hearsay rule.