Here's an excerpt that takes the first major step in precedent in IL law, opposite of that which you claim and even cast judgement upon:

(410 ILCS 50/3)
Sec. 3. The following rights are hereby established:
(a) The right of each patient to care consistent with sound nursing
and medical practices, to be informed of the name of the physician
responsible for coordinating his or her care, to receive information
concerning his or her condition and proposed treatment, to refuse any
treatment to the extent permitted by law, and to privacy and
confidentiality of records except as otherwise provided by law.

Good luck finding a panel of experts that will testify that allowing someone to leave a clinic in writhing and blinding pain is good medical practice. They're out there, but they're paid by counsel to say what's best for the defense, and any jury would not favor such a cold-hearted application of healthcare given the amount of compounds available to bring someone's pain under control.

No offense but you'd better brush up on your legal studies if your practice is to endure for any reasonable period of time.

Every state has statute to this wording and usually even stronger.