410 ILCS 210/1: Consent by minor.

The consent to the performance of a health care service by a physician licensed to practice medicine in all its branches, a chiropractic physician, a licensed optometrist, a licensed advanced practice registered nurse, or a licensed physician assistant executed by a married person who is a minor, by a parent who is a minor, by a pregnant woman who is a minor, or by any person 18 years of age or older, is not voidable because of such minority, and, for such purpose, a married person who is a minor, a parent who is a minor, a pregnant woman who is a minor, or any person 18 years of age or older, is deemed to have the same legal capacity to act and has the same powers and obligations as has a person of legal age.